For the fiscal year ended December 31, 2016.

For the transition period from                      to                     .

None 

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ý  No  ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  ý

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ý    No  ¨

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ý    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ¨    No  ý

As of February 20, 2017, the registrant had 558,221,985 shares of Common Stock outstanding.

We are a diversified healthcare company that seeks to establish industry-leading positions in large and rapidly growing medical markets. Our diagnostics business includes Bio-Reference Laboratories (“Bio-Reference”), the nation’s third-largest clinical laboratory with a core genetic testing business and a 400-person sales and marketing team to drive growth and leverage new products, including the 4Kscore prostate cancer test and the Claros 1 in-office immunoassay platform (in development). Our pharmaceutical business features Rayaldee, an FDA-approved treatment for secondary hyperparathyroidism (“SHPT”) in adults with stage 3 or 4 chronic kidney disease (“CKD”) and vitamin D insufficiency (launched in November 2016), and VARUBI™ for chemotherapy-induced nausea and vomiting (oral formulation launched by partner TESARO in November 2015 and pending approval for IV formulation), TT401, a once or twice weekly oxyntomodulin for type 2 diabetes and obesity which is a clinically advanced drug candidate among the new class of GLP-1 glucagon receptor dual agonists, and TT701, an androgen receptor modulator for androgen deficiency indications which we intend to study for benign prostate hypertrophy (BPH). Our pharmaceutical business also features hGH-CTP, a once-weekly human growth hormone injection (in Phase 3 for growth hormone deficiency and partnered with Pfizer), and a long-acting Factor VIIa drug for hemophilia (Phase 2a). In addition to our pharmaceutical and diagnostic development programs, we own established pharmaceutical platforms in Ireland, Chile, Spain and Mexico which generate revenue and which we expect to facilitate future market entry for our products currently in development. We have a development and commercial supply pharmaceutical company, as well as a global supply chain operation and holding company in Ireland, which we expect will play an important role in the development, manufacturing, distribution and approval of a wide variety of drugs with an emphasis on high potency products. We also own a specialty active pharmaceutical ingredients (“APIs”) manufacturer in Israel, which we expect will facilitate the development of our pipeline of molecules and compounds for our proprietary molecular diagnostic and therapeutic products.

We launched our first pharmaceutical product, Rayaldee, in the U.S. market in the fourth quarter of 2016. We have under development a broad and diversified portfolio of diagnostic tests, small molecules, and biologics targeting a broad range of unmet medical needs. We also operate the third largest full service clinical laboratory in the U.S. We intend to continue to leverage our proprietary technology and our strengths in all phases of research and development to further develop and commercialize our portfolio of proprietary pharmaceutical and diagnostic products. In support of our strategy, we intend to:

In addition, we expect to leverage the Bio-Reference business and infrastructure to drive rapid and widespread uptake of our diagnostic products, including the 4Kscore test and the Claros 1 in-office immunoassay platform. We also intend to

Bio-Reference provides us with a significant diagnostics commercial infrastructure for marketing and sales that reached more than 11 million patients in 2016. In addition, its large team of managed care experts complement our efforts to ensure that payors recognize the value of our diagnostic and laboratory tests for reimbursement purposes. We continue to leverage the national marketing, sales and distribution resources of Bio-Reference, along with its 400-person sales and marketing team, to enhance sales of and reimbursement for our 4Kscore test, a laboratory developed blood test that provides a personalized risk score for aggressive prostate cancer. We plan to continue to leverage the Bio-Reference commercial infrastructure and capabilities, as well as its extensive relationships with payers, to commercialize OPKO’s other diagnostic products under development, including the Claros 1.

We offer the 4Kscore test through our Bio-Reference laboratory located in Elmwood Park, New Jersey. We began selling the 4Kscore test in the U.S. in March 2014 and in Europe and Mexico in September 2014 and January 2015, respectively. The 4Kscore test is a laboratory developed test that measures the blood plasma levels of four different prostate-derived kallikrein proteins: Total PSA, Free PSA, Intact PSA and Human Kallikrein-2 (“hK2”). These biomarkers are then combined with a patient’s age, DRE status (nodule / no nodule), and prior negative biopsy status (yes / no) using a proprietary algorithm to calculate the risk (probability) of finding a Gleason Score 7 or higher prostate cancer. The four kallikrein panel of biomarkers utilized in the 4Kscore test is based on decades of research conducted by scientists at Memorial Sloan-Kettering Cancer Center and leading European institutions. Investigators at the Lund University, Sweden, University of Turku, Finland and Memorial Sloan Kettering Cancer Center, New York, have also demonstrated that the 4Kscore test can predict the 20-year risk for development of prostate metastases in men who present at age 50 or 60 years old with an elevated PSA.

The 4Kscore test was developed by OPKO and validated in 2014 in a prospective, blinded study of 1,012 men in collaboration with 26 urology centers across the U.S. Results showed that the 4Kscore test was highly accurate for predicting the presence of high-grade cancer (Gleason score 7 or higher) prior to prostate biopsy. The full data from the blinded, prospective U.S. clinical validation study were published in European Urology (Eur Urol. 2015 Sep;68(3):464-70. doi: 10.1016/j.eururo.2014.10.021. Epub 2014 Oct 27.).

The clinical data demonstrated the ability of the 4Kscore test to discriminate between men with high-grade, aggressive prostate cancer and those men who had no findings of cancer or had low-grade or indolent form of the disease. The discrimination, measured by Area Under the Curve (“AUC”) analysis, was 0.82 and was significantly higher than previously developed tests. Furthermore, the 4Kscore test demonstrated excellent risk calibration, indicating the accuracy of the result for

an individual patient. The high value of AUC and the excellent risk calibration make the 4Kscore test result valuable information for the shared decision-making between the urologist and patient on whether or not to perform a prostate biopsy.

A separate clinical study indicated that the 4Kscore test led to 64.6% fewer biopsies. The study, “The 4Kscore® Test Reduces Prostate Biopsy Rates in Community and Academic Urology Practices”, published in the January 2016 edition of Reviews in Urology, which included 611 patients seen by 35 academic and community urologists across the U.S., evaluated the influence of the 4Kscore test on urologist-patient decisions about whether to perform a biopsy in men who had an abnormal PSA and or DRE result. Test results for patients were stratified into low risk (< 7.5%), intermediate risk (7.5%-19.9%) and high risk (≥20%) for developing aggressive prostate cancer. Nearly half (49.3%) of the men were categorized as low risk; 25.7% and 25.0% fell into the intermediate-risk and high-risk categories, respectively. Notably, the 4Kscore test results influenced biopsy decisions in 88.7% of the men. In the three risk groups, a biopsy was avoided in 94.0%, 52.9%, and 19.0% of men in the low, intermediate, and high-risk categories, respectively.

The value of the 4Kscore test has been demonstrated in 12 peer-reviewed clinical studies involving more than 22,000 patients and we have been granted a Category I CPT code by the AMA for our 4Kscore test, which was published in August 2016 and effective January 1, 2017. CPT codes are used by insurance companies and government payers to describe health care services and procedures, and having a Category I CPT code is critical to facilitate reimbursement in government programs such as Medicare and Medicaid, as well as private insurance programs. We believe having the Category I CPT code will help facilitate obtaining broader coverage from payers for the 4Kscore test and allow greater access to the test for a broader group of patients across the U.S.

The National Comprehensive Cancer Network (“NCCN”) included the 4Kscore test as a recommended test in their 2015 and 2016 Guidelines for Prostate Cancer Early Detection. The panel making this recommendation concluded that the 4Kscore test is indicated for use prior to a first prostate biopsy, or after a negative biopsy, to assist patients and physicians in further defining the probability of high-grade cancer. In addition, the European Association of Urology (EAU) Prostate Cancer Guidelines Panel included the 4Kscore test in the 2016 EAU Guidelines for Prostate Cancer, concluding that the 4Kscore, as a blood test with greater specificity over the PSA test, is indicated for use prior to a first prostate biopsy or after a negative biopsy to assist patients and physicians in further defining the probability of high-grade cancer.

We have and will continue to commit substantial efforts to obtaining broad reimbursement coverage for the 4Kscore test. We have obtained a positive coverage decision from at least one national private payer and pricing agreements from several regional payers. Novitas Solutions, the local Medicare Administrative Contractor, or MAC, for our laboratory in New Jersey, has been and continues to pay for the majority of our 4Kscore Medicare submissions. Although Novitas initially issued a positive draft local coverage determination (LCD) in May 2016, the coverage determination was retired due to a conflicting LCD issued by Palmetto, another MAC. We are working diligently to address concerns raised by Palmetto pertaining primarily to clinical utility and believe we have supplied sufficient scientific and clinical data to support a positive coverage determination by any Medicare contractor. We expect to significantly expand our efforts to obtain broad reimbursement for the 4Kscore test throughout 2017 and beyond.

We commenced a multi-center clinical trial for the PSA test in January 2017 and expect to submit our application to the FDA for a pre-marketing authorization (“PMA”) for the PSA test upon completion of the trial. We also intend to commence a clinical trial of a testosterone diagnostic test for our point-of-care system. We expect to fully leverage Bio-Reference’s marketing, sales and distribution resources for the launch of the Claros 1 system and associated diagnostic tests in the U.S after FDA clearance or approval.

We launched Rayaldee, our lead renal product, in the U.S. market in November 2016. In June 2016, the FDA approved Rayaldee extended release capsules for the treatment of secondary hyperparathyroidism (SHPT) in adults with stage 3 or 4 chronic kidney disease (CKD) and serum total 25-hydroxyvitamin D levels less than 30 ng/mL. Rayaldee is a patented extended release product containing 30 mcg of a prohormone called calcifediol (25-hydroxyvitamin D₃).

We have a 50-person highly specialized sales and marketing team dedicated to the launch and commercialization of Rayaldee, and we expect to increase our sales and marketing efforts in the second half of 2017. Efforts are underway to obtain broad commercial and Part D insurance coverage for Rayaldee. The Company has contracted for commercial and Part D coverage for more than sixty percent (60%) of U.S. covered lives and expects that number to reach seventy percent (70%) by mid-2017.

In connection with the launch of Rayaldee, the Company has also engaged in a comprehensive ongoing market education campaign highlighting the unmet need in treating SHPT, including by leveraging key opinion leaders in community outreach programs such as speakers' bureaus and patient advocacy programs.

In May 2016, we entered into a collaboration with Vifor Fresenius Medical Care Renal Pharma (VFMCRP) for the development and commercialization of Rayaldee in Europe, Canada, Mexico, Australia, South Korea and certain other international markets for the treatment of SHPT in patients with stage 3 or 4 CKD and vitamin D insufficiency. Under the terms of the agreement, OPKO received an upfront payment of $50 million, and will receive up to $232 million in regulatory and sales based milestones. In addition, VFMCRP will pay OPKO tiered, double digit royalties on sales of the product. OPKO and VFMCRP will also collaborate to develop and commercialize a new dosage form of Rayaldee for the treatment of SHPT in hemodialysis patients. OPKO granted VFMCRP an option to acquire rights to this dosage form for the U.S. market; if exercised, OPKO will receive up to $555 million in additional milestones and double digit royalties.

The FDA approval for Rayaldee was supported by successful top-line results from two pivotal phase 3 trials of Rayaldee that were identical randomized, double-blind, placebo-controlled, multi-site studies which established the safety and efficacy of Rayaldee as a new treatment for SHPT in adults with stage 3 or 4 CKD and vitamin D insufficiency.

The completed pivotal trials for Rayaldee successfully met all primary efficacy and safety endpoints. The primary efficacy endpoint was a responder analysis in which “responder” was defined as any treated subject who demonstrated an average 30% decrease in PTH from pre-treatment baseline during the last six weeks of the 26-week treatment period. A significantly higher response rate was observed with Rayaldee which steadily increased with treatment duration. The response rate with Rayaldee was similar in CKD stages 3 and 4. Safety and tolerability data were comparable in both treatment groups. Patients completing the two pivotal trials were treated, at their election, for an additional six months with Rayaldee during an open-label extension study. Data from the extension study indicated that the PTH lowering response rates steadily increased with duration of Rayaldee treatment without deterioration in safety profile. In addition to SHPT in CKD patients, we also are developing Rayaldee for other indications, including for SHPT in patients with vitamin D insufficiency and stage 5 CKD requiring regular hemodialysis. A phase 2 study is expected to commence in 2017 in hemodialysis patients. In August 2014, we also announced the submission of an IND to the FDA to evaluate Rayaldee as an adjunctive therapy for the prevention of skeletal-related events in patients with bone metastases undergoing anti-resorptive therapy. We commenced a phase 1 dose escalation study in the fourth quarter of 2014 in breast and prostate cancer patients with bone metastases who are receiving anti-resorptive therapy. The study is evaluating safety, markers of vitamin D and mineral metabolism and tumor progression.  We are currently evaluating interim data from the study.

Our second most advanced renal product, Alpharen (Fermagate Tablets), is a new and potent non-absorbed phosphate binder to treat hyperphosphatemia in Stage 5 CKD patients requiring regular hemodialysis. Alpharen (Fermagate Tablets) has been shown to be safe and effective in treating hyperphosphatemia in phase 2 and 3 trials in stage 5 CKD patients undergoing

We believe the CKD patient population is large and growing as a result of obesity, hypertension and diabetes; therefore this patient population represents a significant market opportunity. According to the National Kidney Foundation, CKD afflicts over 26 million people in the U.S., including more than 20 million patients with stage 3 or 4 CKD. In stage 5 CKD, kidney function is minimal to absent and most patients require regular dialysis or a kidney transplant for survival. An estimated 71-97% of CKD patients have vitamin D insufficiency which can lead to SHPT and its debilitating consequences. CKD continues to be associated with poor outcomes, reflecting the inadequacies of the current standard of care. Vitamin D insufficiency, hyperphosphatemia and SHPT, when inadequately treated, are major contributors to poor CKD outcomes. We intend to develop and commercialize Rayaldee and Alpharen to constitute part of the foundation for a new and markedly improved standard of care for CKD patients having SHPT and/or hyperphosphatemia.

•The active group had a mean change in trunk fat mass of -0.4kg and placebo group was 0;

•There was no statistically significant difference (≤ 0.05 (p value)) between the active and placebo group;

•97% of hGH-CTP vs 6% of placebo group showed IGF-1 normalization; and

•The safety profile of hGH-CTP is consistent with that observed with those treated with daily growth hormone

OPKO CURNA, LLC (“CURNA”), previously CURNA Inc., is engaged in the discovery of new drugs for the treatment of a wide variety of illnesses, including cancer, heart disease, metabolic disorders and a range of genetic anomalies. CURNA’s broad platform technology utilizes a short, single strand oligonucleotide and is based on the up-regulation of protein production through interference with non-coding RNA’s, or natural antisense. This strategy contrasts with established approaches which down-regulate protein production. CURNA has designed a novel type of therapeutic modality, termed AntagoNAT, and has initially demonstrated this approach for up-regulation of several therapeutically relevant proteins in in vitro and animal models. We believe that this short, single strand oligonucleotide can be delivered intravenously or subcutaneously without the drug delivery or cell penetration complications typically associated with double stranded siRNA therapeutics. CURNA has identified and developed compounds which increase the production of over 80 key proteins involved in a large number of individual diseases. We have ongoing pre-clinical studies for several of these compounds, with an initial focus on orphan diseases including Dravet Syndrome, Rett Syndrome and MPS-1.

To complement our portfolio of respiratory products, we acquired Inspiro Medical Ltd., a medical device firm developing a new platform to deliver small molecule drugs like corticosteroids and beta agonists or larger molecules to treat respiratory disease. Inspiro’s Inspiromatic is a “smart” easy-to-use dry powder inhaler with several advantages over existing devices. In a First In Man double blinded clinical study conducted in 30 asthmatic children comparing Inspiromatic to a market leading dry powder inhaler, Inspiromatic demonstrated superior pulmonary delivery of the active drug.

During the years ended December 31, 2016, 2015, and 2014, we incurred $111.2 million, $99.5 million, and $83.6 million, respectively, of research and development expenses related to our various product candidates. During the years ended December 31, 2016, 2015 and 2014, our research and development expenses primarily consisted of OPKO Biologics and OPKO Renal development programs including, expenses related to the development of hGH-CTP and phase 3 clinical trials for Rayaldee.

We have multiple U.S. patent families relating to Rayaldee. These patents are also filed in multiple countries worldwide. One patent family claims a sustained release oral dosage formulation and a method of treating 25-hydroxy vitamin D insufficiency or deficiency and will not expire until at least February 2027. A second patent family claims a method of administering 25-hydroxy vitamin D₃ by controlled release, a formulation for controlled release of a vitamin D compound, a controlled release oral dosage formulation of a vitamin D compound and a method of treatment, and will not expire until at least April 2028. We also have additional patent applications pending relating to the sustained release formulation and its use which will expire in 2034 and have licensed patents covering the capsule shell. The patents issued in the U.S. covering Rayaldee are listed in the Approved Drug Products with Therapeutic Equivalents Evaluations, or the Orange Book.

Our strategy is to develop a portfolio of product candidates through a combination of internal development, acquisition, and external partnerships. Collaborations are key to our strategy and we continue to build relationships and forge partnerships in various areas where unmet medical need and commercial opportunities exist. In May 2016, we entered into a license and collaboration with VFMCRP for the development and commercialization of Rayaldee in Europe, Canada, Mexico, Australia, South Korea and certain other international markets for the treatment of SHPT in adults with CKD and vitamin D insufficiency. In December 2014, we entered into an exclusive agreement with Pfizer for the development and commercialization of our long-acting hGH-CTP for the treatment of GHD in adults and children, as well as for the treatment of growth failure in children born small for gestational age. Previously, we (or entities we have acquired) have completed strategic licensing transactions with the University of Texas Southwestern Medical Center at Dallas, the President and Fellows of Harvard College, Academia Sinica, The Scripps Research Institute, TESARO, INEOS Healthcare, and Arctic Partners, among others.

We are seeking to commercialize our 4Kscore product in the U.S., Europe and Mexico in a laboratory setting and to capitalize on near-term commercialization opportunities for our proprietary diagnostic point-of-care system by transitioning laboratory-based tests, including the 4Kscore, PSA, testosterone and other tests to our point-of-care system. We expect to leverage Bio-Reference’s national marketing, sales and distribution resources, along with its 400-person sales and marketing team to support commercialization of the 4Kscore and Claros 1 products. Competitors to our diagnostics business are many and include major diagnostic companies, molecular diagnostic firms, universities, and research institutions.

Other than Rayaldee, none of our pharmaceutical products under development have been approved for marketing in the U.S. or elsewhere. We may not be able to obtain regulatory approval for any such products under development in a timely manner, if at all. Failure to obtain requisite governmental approvals or failure to obtain approvals of the scope requested will delay or preclude us, or our licensees or marketing partners, from marketing our products, or limit the commercial use of our products, and thereby would have a material adverse effect on our business, financial condition, and results of operations. See “Risk Factors — The results of pre-clinical trials and previous clinical trials for our products may not be predictive of future results, and our current and planned clinical trials may not satisfy the requirements of the FDA or other non-U.S. regulatory authorities.”

Sunshine Act

With the launch of Rayaldee, we are now subject to the federal Physician Payments Sunshine Act under the Affordable Care Act, and its implementing regulations (the “Sunshine Act”). The Sunshine Act requires manufacturers of drugs, devices, biological and medical supplies covered by Medicare, Medicaid or the Children’s Health Insurance Program, to report information related to certain payments or other transfers of value made or distributed to physicians and teaching hospitals, or to entities or individuals at the request of, or designated on behalf of, the physicians and teaching hospitals. Manufacturers must also report, on an annual basis, certain ownership and investment interests held by physicians and their immediate family members and payments or other “transfers of value” made to such physician owners. A failure to report each payment, other transfer of value, or ownership/investment interest in a timely, accurate, and complete manner may result in civil monetary penalties of up to $150,000 annually. Further, the “knowing” failure to report each payment, other transfer of value, or ownership/investment interest may result in a one million dollar annual penalty. Several other states and a number of countries worldwide have adopted or are considering the adoption of similar transparency laws. Any failure by us to implement proper procedures to track and report on a timely basis transfers of value to physicians and teaching hospitals could result in substantial penalties.

Our diagnostics business includes Bio-Reference’s 400-person sales and marketing team in the U.S. to drive growth and leverage new products, including the 4Kscore prostate cancer test and the Claros 1 in-office immunoassay platform. We have a highly specialized, field based 50-person sales and marketing team in the U.S. dedicated to the launch and commercialization of Rayaldee. We also have limited sales and marketing personnel in Ireland, Chile, Spain, Mexico and Israel.

As of December 31, 2016, we had 6,041 full-time employees worldwide. None of our employees are represented by a collective bargaining agreement.

We are not profitable and have incurred losses since our inception. We may not generate substantial revenue from the sale of proprietary pharmaceutical products or certain of our diagnostic products for some time and we have generated only limited revenue from our pharmaceutical operations in the United States, Chile, Mexico, Israel, Spain, and Ireland, and from sale of the 4Kscore test. We may not successfully leverage the national marketing, sales and distribution resources of Bio-Reference to enhance sales of, and reimbursement for, our 4Kscore test and our other diagnostic products under development, which would adversely impact our ability to generate substantial revenue from the sale of these products for some time. Rayaldee is our only pharmaceutical product that has been approved for marketing, other than those products sold by our Chilean, Mexican, Israeli, Spanish, and Irish subsidiaries. We continue to incur substantial research and development and general and administrative expenses related to our operations and, to date, we have devoted most of our financial resources to research and development, including our pre-clinical development activities and clinical trials. We may incur losses from our operations for the foreseeable future and these losses could increase as we continue our research activities and conduct development of, and seek regulatory approvals and clearances for, our product candidates, and prepare for and begin to commercialize any approved or cleared products, particularly if we are unable to generate profits and cash flow from Bio‑Reference and our other commercial businesses. If we are unable to generate profits and cash flow from Bio-Reference and our other commercial businesses, our product candidates fail in clinical trials or do not gain regulatory approval or clearance, or if our approved products and product candidates do not achieve market acceptance, we may never become profitable. In particular, if we are unable to successfully commercialize Rayaldee, we may never generate substantial revenues from Rayaldee or achieve profitability. In addition, if we are required by the U.S. Food and Drug Administration (“FDA”), to perform studies in addition to those we currently anticipate, our expenses will increase beyond current expectations and the timing of any potential product approval may be delayed. Even if we achieve profitability in the future, we may not be able to sustain profitability in subsequent periods.

As of December 31, 2016, we have cash and cash equivalents of $168.7 million. We believe we have sufficient cash and cash equivalents on hand or available to us from operations or through lines of credit to meet our anticipated cash requirements for operations and debt service beyond the next 12 months. We have based this estimate on assumptions that may prove to be wrong or subject to change, and we may be required to use our available capital resources sooner than we currently expect or curtail aspects of our operations in order to preserve our capital. Because of the numerous risks and uncertainties associated with the development and commercialization of our products and product candidates, the success of our relationship with Pfizer and VFMCRP and the success of our integration of Bio-Reference and Transition Therapeutics, we are unable to estimate the amounts of increased capital outlays and operating expenditures associated with our current and anticipated clinical trials and our expanded commercial operations. Our future capital requirements will depend on a number of factors, including the successful commercialization of Rayaldee, our relationship with Pfizer and VFMCRP, cash flow generated by Bio-Reference and costs associated with the integration of the Bio-Reference and Transition Therapeutics operations, the continued progress of our research and development of product candidates, the timing and outcome of clinical trials and regulatory approvals, the costs involved in preparing, filing, prosecuting, maintaining, defending, and enforcing patent claims and other intellectual property rights, the status of competitive products, the availability of financing, and our success in developing markets for our products and product candidates.

In June 2016, the FDA approved the Company’s New Drug Application for Rayaldee (calcifediol) extended release capsules for the treatment of secondary hyperparathyroidism (SHPT) in adults with stage 3 or 4 chronic kidney disease (CKD) and serum total 25-hydroxyvitamin D levels less than 30 ng/mL. The commercial launch for Rayaldee began in November 2016. Rayaldee is our only pharmaceutical product approved for marketing in the U.S. and our ability to generate revenue from product sales and achieve profitability is substantially dependent on our ability to effectively commercialize Rayaldee. Our failure to successfully commercialize Rayaldee would have a material adverse effect on our business, financial condition, cash flows and results of operations.

Additionally, the market perception and reputation of Rayaldee and its safety and efficacy are important to our business and the continued acceptance of our product candidates and products. Any negative publicity about Rayaldee, such as the discovery of safety issues, adverse events, or even public rumors about such events, could have a material adverse effect on our business. Levels of market acceptance for Rayaldee could be impacted by several factors, some of which are not within our control, including but not limited to the:

If Rayaldee fails to gain, or loses, market acceptance, our revenues would be adversely impacted and we may be required to take material impairment charges, all of which could have a material adverse effect on our business, financial condition, cash flows and results of operations.

Our business is dependent on our ability to successfully commercialize the 4Kscore test and other diagnostic products, including the Claros 1. We are committing significant resources to the development and commercialization of these products, and there is no guarantee that we will be able to successfully commercialize these tests. We have limited experience in developing, manufacturing, selling, marketing and distributing diagnostic tests. If we fail to leverage the national marketing, sales and distribution resources of Bio-Reference to enhance sale of, and reimbursement for, the 4Kscore test and other diagnostic products including the Claros 1, our ability to generate substantial revenue from the sale of these products will be adversely impacted. If we are not able to successfully develop, market or sell diagnostic tests we develop for any reason, including the failure to obtain any required regulatory approvals, obtain reimbursement for, or successfully integrate Bio-Reference, we will not generate any meaningful revenue from the sale of such tests. Even if we are able to develop effective diagnostic tests for sale in the marketplace, a number of factors could impact our ability to sell such tests or generate any significant revenue from the sale of such tests, including without limitation:

Other than our 50 person specialized sales and marketing team dedicated to Rayaldee, we currently have no pharmaceutical marketing, sales or distribution capabilities in the U.S. Any failure or inability to maintain adequate sales, marketing, and distribution capabilities would adversely impact the commercialization of Rayaldee or our other pharmaceutical products or candidates. If we are not successful in commercializing our existing and future pharmaceutical products and product candidates, either on our own or through collaborations with one or more third parties, our product revenue will suffer and we may incur significant additional losses.

Our operations depend, in part, on the continued performance of our information technology systems. Our information technology systems are potentially vulnerable to physical or electronic break-ins, computer viruses and similar disruptions. In

The research, testing, manufacturing, labeling, approval, selling, marketing, and distribution of drug products, diagnostic products, or medical devices are subject to extensive regulation by the FDA and other non-U.S. regulatory authorities, which regulations differ from country to country. In general, we are not permitted to market our product candidates in the U.S. until we receive approval of a Biologics License Application (BLA), an approval of a NDA, a clearance letter under the premarket notification process, or 510(k) process, or an approval of a PMA from the FDA. To date, we have only submitted one NDA which was approved in June 2016. We have not received marketing approval or clearance for any of our diagnostic product candidates, other than a CE Mark for our point-of-care PSA test and a CE Mark for our 4Kscore test. Obtaining approval of a NDA or PMA can be a lengthy, expensive, and uncertain process. With respect to medical devices, while the FDA reviews and clears a premarket notification in as little as three months, there is no guarantee that our products will qualify for this more expeditious regulatory process, which is reserved for Class I and II devices, nor is there any assurance that even if a device is reviewed under the 510(k) process that the FDA will review it expeditiously or determine that the device is substantially equivalent to a lawfully marketed non-PMA device. If the FDA fails to make this finding, then we cannot market the device. In lieu of acting on a premarket notification, the FDA may seek additional information or additional data which would further delay our ability to market the product. Furthermore, we are not permitted to make changes to a device approved through the PMA or 510(k) which affects the safety or efficacy of the device without first submitting a supplement application to the PMA and obtaining FDA approval or cleared premarket notification for that supplement. In some cases, the FDA may require

We have a large amount of goodwill and other intangible assets and we are required to perform an annual, or in certain situations a more frequent, assessment for possible impairment for accounting purposes. At December 31, 2016, we have goodwill and other intangible assets of $2.1 billion, or approximately 76% of our total assets. If we do not achieve our planned operating results, we may be required to incur a non-cash impairment charge. Any impairment charges in the future will adversely affect our results of operations. A significant write down of goodwill and/or other intangible assets would have a material adverse effect on our reported results of operations and net worth.

The table below summarizes certain information as to our significant physical properties as of December 31, 2016:

The following table sets forth for the periods indicated the high and low sales prices per share of our Common Stock during each of the quarters set forth below as reported on the NASDAQ or NYSE, as applicable: 

As of February 20, 2017, there were approximately 595 holders of record of our Common Stock.

We are a diversified healthcare company that seeks to establish industry-leading positions in large and rapidly growing medical markets. Our diagnostics business includes Bio-Reference Laboratories (“Bio-Reference”), the nation’s third-largest clinical laboratory with a core genetic testing business and a 400-person sales and marketing team to drive growth and leverage new products, including the 4Kscore prostate cancer test and the Claros 1 in-office immunoassay platform (in development). Our pharmaceutical business features Rayaldee, an FDA-approved treatment for secondary hyperparathyroidism (“SHPT”) in adults with stage 3 or 4 chronic kidney disease (“CKD”) and vitamin D insufficiency (launched in November 2016), and VARUBI™ for chemotherapy-induced nausea and vomiting (oral formulation launched by partner TESARO in November 2015 and pending approval for IV formulation), TT401, a once or twice weekly oxyntomodulin for type 2 diabetes and obesity which is a clinically advanced drug candidate among the new class of GLP-1 glucagon receptor dual agonists (Phase 2b) , and TT701, an androgen receptor modulator for androgen deficiency indications. Our pharmaceutical business also features hGH-CTP, a once-weekly human growth hormone injection (in Phase 3 and partnered with Pfizer), a once-daily Factor VIIa drug for hemophilia (Phase 2a), and long-acting oxyntomodulin (“OXM”) for diabetes and obesity (Phase 1).

In November 2016, we launched commercial sales for Rayaldee in the U.S. market. The FDA approved Rayaldee extended release capsules in June 2016 for the treatment of secondary hyperparathyroidism (SHPT) in adults with stage 3 or 4 chronic kidney disease (CKD) and serum total 25-hydroxyvitamin D levels less than 30 ng/mL. We have a highly specialized sales and marketing team dedicated to the launch and commercialization of Rayaldee, and we expect to increase the sales and marketing team in the second half of 2017.

Revenues. Revenues for the year ended December 31, 2016 increased $729.9 million compared to the prior year. Revenues for the years ended December 31, 2016 and 2015 were as follows:

The increase in Revenue from services is attributable to the acquisition of Bio-Reference in August 2015. The increase in Revenue from products principally reflects an increase in revenue from EirGen, which we acquired in May 2015, and an increase in revenue from OPKO Chile. Revenue from transfer of intellectual property for the year ended December 31, 2016 principally reflects $50.0 million of revenue from the initial payment in the VFMCRP Agreement and $70.6 million of revenue from the transfer of intellectual property related to the Pfizer Transaction. Revenue from transfer of intellectual property for the year ended December 31, 2015 principally reflects $65.5 million of revenue from the transfer of intellectual property related to the Pfizer Transaction and $15.0 million of revenue from a milestone payment from our licensee, TESARO, in the fourth quarter of 2015. We are recognizing the non-refundable $295.0 million upfront payments received in the Pfizer Transaction on a straight-line basis over the expected performance period. The performance period is expected to continue through 2019, when we anticipate completing the various research and development services that are specified in the Pfizer Transaction.

Costs of revenue. Costs of revenue for the year ended December 31, 2016 increased $376.2 million compared to the prior year. Our acquisition of Bio-Reference in August 2015 accounted for $375.9 million of the increase in cost of service revenue. The increase in cost of product revenue is attributable to an increase in cost of revenue from EirGen and OPKO Chile, which was partially offset by the deconsolidation of SciVac Therapeutics Inc. (“STI”) in July 2015. Cost of revenue for the years ended December 31, 2016 and 2015 were as follows:

Selling, general and administrative expenses. Selling, general and administrative expenses for the years ended December 31, 2016 and 2015 were $490.9 million and $196.6 million, respectively. The increase in selling, general and administrative expenses for the year ended December 31, 2016 was primarily due to the acquisition of Bio-Reference in August 2015, which accounted for $382.4 million of selling, general and administrative expenses in the 2016 period compared to $118.1 million for the comparable period of 2015. In addition, the year ended December 31, 2016 included costs related to the launch of Rayaldee. Included in selling, general and administrative expenses for the year ended December 31, 2016 are $17.9 million of severance costs for certain Bio-Reference executives.

Selling, general and administrative expenses during the years ended December 31, 2016 and 2015, include equity-based compensation expense of $33.4 million and $17.4 million, respectively. The increase in equity-based compensation expense is due to additional options grants made in 2016 and $8.9 million of expense related to the acceleration of stock option vesting for certain Bio-Reference executives.

Research and development expenses. Research and development expenses for the years ended December 31, 2016 and 2015 were $111.2 million and $99.5 million, respectively. Research and development costs include external and internal expenses, partially offset by third-party grants and funding arising from collaboration agreements. External expenses include clinical and non-clinical activities performed by contract research organizations, lab services, purchases of drug and diagnostic product materials and manufacturing development costs. We track external research and development expenses by individual program for phase 3 clinical trials for drug approval and PMA’s (pre-market approval) for diagnostics tests, if any. Internal expenses include employee-related expenses including salaries, benefits and stock-based compensation expense. Other internal research and development expenses are incurred to support overall research and development activities and include expenses related to general overhead and facilities.

The following table summarizes the components of our research and development expenses:

The increase in research and development expenses during the year ended December 31, 2016, is due to an increase in research and development expenses related to hGH-CTP, a long acting human growth hormone which was outlicensed to Pfizer in 2015, and to an increase in research and development expenses for Factor VIIa-CTP. Research and development expenses for the year ended December 31, 2016 also include $8.8 million from the acquisitions of Bio-Reference and EirGen in August 2015 and May 2015, respectively, compared to $4.1 million for the comparable period of 2015. This was partially offset by decreased expenses incurred by OPKO Renal related to the development of Rayaldee. In addition, during the years ended December 31, 2016 and 2015, we recorded, as an offset to research and development expenses, $2.7 million and $2.3 million, respectively, related to research and development grants received from our collaboration and funding agreements. Research and development expenses for the year ended December 31, 2016 and 2015 include equity-based compensation expenses of $7.5 million and $7.9 million, respectively. We expect our research and development expenses to increase as we continue to expand our research and development of potential future products.

Contingent consideration. Contingent consideration expense for the years ended December 31, 2016 and 2015, were $17.0 million and $5.1 million, respectively. The increase in contingent consideration is attributable to OPKO Renal resulting from an increase in the fair value of our contingent obligations due to changes in assumptions regarding the timing of successful achievement of future milestones driven by the FDA approval of Rayaldee in June 2016. The contingent consideration liabilities at December 31, 2016 relate to potential amounts payable to former stockholders of CURNA, OPKO Diagnostics, OPKO Health Europe and OPKO Renal pursuant to our acquisition agreements in January 2011, October 2011, August 2012 and March 2013, respectively.

Amortization of intangible assets. Amortization of intangible assets was $64.4 million and $28.0 million, respectively, for the years ended December 31, 2016 and 2015. Amortization expense reflects the amortization of acquired intangible assets with defined useful lives. Amortization of intangible assets for the year ended December 31, 2016 also includes $8.0 million of amortization expense related to intangible assets for Rayaldee. Upon the FDA’s approval of Rayaldee in June 2016, we reclassified $187.6 million of IPR&D related to Rayaldee from In-process research and development to Intangible assets, net in our Consolidated Balance Sheet and began to amortize that asset. Amortization of intangible assets for the year ended December 31, 2016 includes $43.2 million and $2.5 million from Bio-Reference and EirGen which we acquired in August 2015 and May 2015, respectively, compared to $14.6 million and $1.7 million, respectively, for the comparable period of 2015. Our IPR&D assets will not be amortized until the underlying development programs are completed. Upon obtaining regulatory approval by the U.S. FDA, the IPR&D assets will be accounted for as a finite-lived intangible asset and amortized on a straight-line basis over its estimated useful life.

Grant repayment. During the year ended December 31, 2015, we made a payment of $25.9 million to the Office of the Chief Scientist of the Israeli Ministry of Economy (“OCS”) in connection with repayment obligations resulting from grants previously made by the OCS to OPKO Biologics to support development of hGH-CTP and the outlicense of the technology outside of Israel. We did not have any such activity for the year ended December 31, 2016.

Interest income. Interest income for the years ended December 31, 2016 and 2015, was not significant as our cash investment strategy emphasizes the security of the principal invested and fulfillment of liquidity needs.

Interest expense. Interest expense for the years ended December 31, 2016 and 2015, was $7.4 million and $8.4 million, respectively. Interest expense is principally related to interest incurred on the 2033 Senior Notes including amortization of related deferred financing costs and to the interest incurred on Bio-Reference's outstanding debt under its credit facility. The decrease in interest expense for the year ended December 31, 2016 is due to a decrease in the average principal amount of the 2033 Senior Notes outstanding in 2016 compared to 2015. Interest expense for the year ended December 31, 2015 also reflects

a non-cash write-off of deferred financing costs of $1.0 million as interest expense related to the exchange of $55.4 million principal of 2033 Senior Notes in 2015. This was partially offset by interest incurred on Bio-Reference’s outstanding debt under its credit facility for the year ended December 31, 2016.

Fair value changes of derivative instruments, net. Fair value changes of derivative instruments, net for the years ended December 31, 2016 and 2015, were $2.8 million of income and $39.1 million of expense, respectively. Fair value changes of derivative instruments, net related to non-cash income (expense) reflects the changes in the fair value of the embedded derivatives in the 2033 Senior Notes of $7.0 million and $(36.6) million for the years ended December 31, 2016 and 2015, respectively. Fair value changes of derivative instruments, net for the year ended December 31, 2016 also reflects $4.2 million of expense related to the change in the fair value of warrants and options to purchase additional shares of Neovasc, Cocrystal Pharma, Inc., ARNO Therapeutics, Inc. and MabVax Therapeutics Holdings, Inc.

Other income and (expense), net. Other income and (expense), net for the years ended December 31, 2016 and 2015, were $3.9 million and $7.7 million of income, respectively. Other income (expense), net for the year ended December 31, 2016 primarily consists of a $2.5 million gain recognized in connection with the merger of STI and VBI Vaccines Inc., a $5.0 million gain recognized in connection with the settlement of a legal matter and foreign currency transaction gains recognized during the period, which was partially offset by a $4.8 million other-than-temporary impairment charge to write our investments in Xenetic, ARNO and RXi down to their respective fair values. Other income (expense), net for the year ended December 31, 2015 primarily consists of a $15.9 million gain recognized on the deconsolidation of STI in 2015 which was partially offset by a $7.3 million other-than-temporary impairment charge to write our investment in RXi Pharmaceuticals Corporation down to its fair value.

Income tax benefit (provision). Our income tax benefit for the years ended December 31, 2016 and 2015 was $56.1 million, and $113.7 million, respectively. The change in income taxes is primarily due to a $93.4 million release of OPKO’s valuation allowance in 2015 on our U.S. deferred tax assets as a result of the merger with Bio-Reference and to changes in the geographic mix of revenues and expenses. In addition, income taxes in 2016 benefited from a favorable corporate tax rate reduction in Israel.

Loss from investments in investees. We have made investments in other early stage companies that we perceive to have valuable proprietary technology and significant potential to create value for us as a shareholder or member. We account for these investments under the equity method of accounting, resulting in the recording of our proportionate share of their losses until our share of their loss exceeds our investment. Until the investees’ technologies are commercialized, if ever, we anticipate they will continue to report a net loss. Loss from investments in investees was $7.7 million and $7.1 million for the years ended December 31, 2016 and 2015, respectively.

Revenues. Revenues for the year ended December 31, 2015 increased $400.6 million compared to the prior year. Our acquisition of Bio-Reference in August 2015 accounted for $321.9 million of the year-over-year revenue growth. Revenues for the years ended December 31, 2015 and 2014 were as follows: