Merck & Co., Inc. (MRK)

US — Healthcare Sector
Peers: ABBV  PFE  LLY  BMY  AMGN  GILD  JNJ 

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Key Metrics & Ratings

  • symbol MRK
  • Rev/Share 25.2556
  • Book/Share 19.1229
  • PB 4.1399
  • Debt/Equity 0.7209
  • CurrentRatio 1.4103
  • ROIC 0.2167

 

  • MktCap 198522031800.0
  • FreeCF/Share 6.7321
  • PFCF 11.651
  • PE 11.4776
  • Debt/Assets 0.3027
  • DivYield 0.0405
  • ROE 0.3816

 

  • Rating A-
  • Score 4
  • Recommendation Buy
  • P/E Score 2
  • DCF Score 5
  • P/B Score 2
  • D/E Score 1

Recent Analyst Ratings

Type Ticker Analyst Firm Previous Rating Current Rating Previous Price Target Current Price Target Date
Downgrade MRK Citigroup Buy Neutral -- $84 May 14, 2025
Initiation MRK Cantor Fitzgerald -- Neutral -- $85 April 22, 2025
Downgrade MRK Deutsche Bank Buy Hold $128 $105 Feb. 18, 2025
Downgrade MRK TD Cowen Buy Hold $121 $100 Feb. 10, 2025
Downgrade MRK Truist Buy Hold -- $110 Jan. 8, 2025
Downgrade MRK BMO Capital Markets Outperform Market Perform $136 $105 Dec. 20, 2024
Resumed MRK BofA Securities -- Buy -- $121 Dec. 10, 2024
Upgrade MRK HSBC Securities Hold Buy -- $130 Dec. 4, 2024
Initiation MRK Bernstein -- Market Perform -- $115 Oct. 17, 2024

News

ROSEN, A LEADING LAW FIRM, Encourages Merck & Co., Inc. Investors to Secure Counsel Before Important Deadline in Securities Class Action - MRK
MRK
Published: March 21, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK CITY, NY / ACCESS Newswire / March 21, 2025 / WHY: Rosen Law Firm, a global investor rights law firm, reminds purchasers of securities of Merck & Co., Inc. (NYSE:MRK) between February 3, 2022 and February 3, 2025, both dates inclusive (the "Class Period"), of the important April 14, 2025 lead plaintiff deadline. SO WHAT: If you purchased Merck securities during the Class Period you may be entitled to compensation without payment of any out of pocket fees or costs through a contingency fee arrangement.

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image for news ROSEN, A LEADING LAW FIRM, Encourages Merck & Co., Inc. Investors to Secure Counsel Before Important Deadline in Securities Class Action - MRK
Lost Money on Merck & Co., Inc.(MRK)? Join Class Action Suit Seeking Recovery - Contact Levi & Korsinsky
MRK
Published: March 21, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 21, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=137829&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Lost Money on Merck & Co., Inc.(MRK)? Join Class Action Suit Seeking Recovery - Contact Levi & Korsinsky
INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Merck & Co., Inc. of Class Action Lawsuit and Upcoming Deadlines - MRK
MRK
Published: March 21, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK CITY, NY / ACCESS Newswire / March 21, 2025 / Pomerantz LLP announces that a class action lawsuit has been filed against Merck & Co., Inc. ("Merck" or the "Company") (NYSE:MRK). Such investors are advised to contact Danielle Peyton at newaction@pomlaw.com or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext.

Read More
image for news INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Merck & Co., Inc. of Class Action Lawsuit and Upcoming Deadlines - MRK
The Gross Law Firm Reminds Merck Investors of the Pending Class Action Lawsuit with a Lead Plaintiff Deadline of April 14, 2025 – MRK
MRK
Published: March 20, 2025 by: GlobeNewsWire
Sentiment: Neutral

NEW YORK, March 20, 2025 (GLOBE NEWSWIRE) -- The Gross Law Firm issues the following notice to shareholders of Merck & Co., Inc. (NYSE: MRK).

Read More
image for news The Gross Law Firm Reminds Merck Investors of the Pending Class Action Lawsuit with a Lead Plaintiff Deadline of April 14, 2025 – MRK
INVESTOR ALERT: Faruqi & Faruqi, LLP Investigates Claims on Behalf of Investors of Merck & Co.
MRK
Published: March 20, 2025 by: Accesswire
Sentiment: Neutral

Faruqi & Faruqi, LLP Securities Litigation Partner James (Josh) Wilson Encourages Investors Who Suffered Losses In Merck To Contact Him Directly To Discuss Their Options NEW YORK CITY, NY / ACCESS Newswire / March 20, 2025 / If you purchased or acquired securities in Merck between February 3, 2022 and February 3, 2025 and would like to discuss your legal rights, call Faruqi & Faruqi partner Josh Wilson directly at 877-247-4292 or 212-983-9330 (Ext. 1310). [You may also click here for additional information] Faruqi & Faruqi, LLP, a leading national securities law firm, is investigating potential claims against Merck & …

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image for news INVESTOR ALERT: Faruqi & Faruqi, LLP Investigates Claims on Behalf of Investors of Merck & Co.
MRK SHAREHOLDER ALERT: Bronstein, Gewirtz and Grossman, LLC Announces that Merck & Co., Inc. Stockholders with Substantial Losses Have Opportunity to Lead Class Action Lawsuit!
MRK
Published: March 20, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 20, 2025 / Bronstein, Gewirtz & Grossman, LLC, a nationally recognized law firm, notifies investors that a class action lawsuit has been filed against Merck & Co., Inc. ("Merck" or "the Company") (NYSE:MRK) and certain of its officers. Class Definition This lawsuit seeks to recover damages against Defendants for alleged violations of the federal securities laws on behalf of all persons and entities that purchased or otherwise acquired Merck securities between February 3, 2022 and February 3, 2025, both dates inclusive (the "Class Period").

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image for news MRK SHAREHOLDER ALERT: Bronstein, Gewirtz and Grossman, LLC Announces that Merck & Co., Inc. Stockholders with Substantial Losses Have Opportunity to Lead Class Action Lawsuit!
Shareholders of Merck & Co., Inc. Should Contact The Gross Law Firm Before April 14, 2025 to Discuss Your Rights - MRK
MRK
Published: March 20, 2025 by: PRNewsWire
Sentiment: Neutral

NEW YORK , March 20, 2025 /PRNewswire/ -- The Gross Law Firm issues the following notice to shareholders of Merck & Co., Inc. (NYSE: MRK). Shareholders who purchased shares of MRK during the class period listed are encouraged to contact the firm regarding possible lead plaintiff appointment.

Read More
image for news Shareholders of Merck & Co., Inc. Should Contact The Gross Law Firm Before April 14, 2025 to Discuss Your Rights - MRK
Levi & Korsinsky Notifies Merck & Co., Inc. Investors of a Class Action Lawsuit and Upcoming Deadline - MRK
MRK
Published: March 19, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 19, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=137281&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Levi & Korsinsky Notifies Merck & Co., Inc. Investors of a Class Action Lawsuit and Upcoming Deadline - MRK
Merck & Co (MRK) Investors Who Lost Money Have Opportunity to Lead Securities Fraud Lawsuit
MRK
Published: March 19, 2025 by: PRNewsWire
Sentiment: Neutral

LOS ANGELES , March 19, 2025 /PRNewswire/ -- The Law Offices of Frank R. Cruz announces that investors with losses related to Merck & Co ("Merck" or the "Company") (NYSE: MRK) have opportunity to lead the securities fraud class action lawsuit.

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image for news Merck & Co (MRK) Investors Who Lost Money Have Opportunity to Lead Securities Fraud Lawsuit
Merck & Co., Inc. Class Action: Levi & Korsinsky Reminds Merck Investors of the Pending Class Action Lawsuit with a Lead Plaintiff Deadline of April 14, 2025 - MRK
MRK
Published: March 19, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 19, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=137199&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Merck & Co., Inc. Class Action: Levi & Korsinsky Reminds Merck Investors of the Pending Class Action Lawsuit with a Lead Plaintiff Deadline of April 14, 2025 - MRK
Merck Loses Almost $52B in 6 Months: How to Play MRK Stock
MRK
Published: March 19, 2025 by: Zacks Investment Research
Sentiment: Neutral

We believe investors with a long-term horizon should stay invested in MRK stock, while short-term investors should consider selling the same.

Read More
image for news Merck Loses Almost $52B in 6 Months: How to Play MRK Stock
Levi & Korsinsky Reminds Merck Investors of the Pending Class Action Lawsuit with a Lead Plaintiff Deadline of April 14, 2025 - MRK
MRK
Published: March 19, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 19, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=137178&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Levi & Korsinsky Reminds Merck Investors of the Pending Class Action Lawsuit with a Lead Plaintiff Deadline of April 14, 2025 - MRK
INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Merck & Co., Inc. of Class Action Lawsuit and Upcoming Deadlines - MRK
MRK
Published: March 19, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK CITY, NY / ACCESS Newswire / March 19, 2025 / Pomerantz LLP announces that a class action lawsuit has been filed against Merck & Co., Inc. ("Merck" or the "Company") (NYSE:MRK). Such investors are advised to contact Danielle Peyton at newaction@pomlaw.com or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext.

Read More
image for news INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Merck & Co., Inc. of Class Action Lawsuit and Upcoming Deadlines - MRK
Levi & Korsinsky Reminds Shareholders of a Lead Plaintiff Deadline of April 14, 2025 in Merck Lawsuit - MRK
MRK
Published: March 18, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 18, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=136914&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Levi & Korsinsky Reminds Shareholders of a Lead Plaintiff Deadline of April 14, 2025 in Merck Lawsuit - MRK
ROSEN, GLOBAL INVESTOR COUNSEL, Encourages Merck & Co., Inc. Investors to Secure Counsel Before Important Deadline in Securities Class Action - MRK
MRK
Published: March 18, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK CITY, NY / ACCESS Newswire / March 18, 2025 / WHY: New York, N.Y., March 18, 2025.

Read More
image for news ROSEN, GLOBAL INVESTOR COUNSEL, Encourages Merck & Co., Inc. Investors to Secure Counsel Before Important Deadline in Securities Class Action - MRK
Class Action Filed Against Merck & Co., Inc. (MRK) - April 14, 2025 Deadline to Join – Contact Levi & Korsinsky
MRK
Published: March 18, 2025 by: GlobeNewsWire
Sentiment: Neutral

NEW YORK, March 18, 2025 (GLOBE NEWSWIRE) -- Levi & Korsinsky, LLP notifies investors in Merck & Co., Inc. ("Merck" or the "Company") (NYSE: MRK) of a class action securities lawsuit.

Read More
image for news Class Action Filed Against Merck & Co., Inc. (MRK) - April 14, 2025 Deadline to Join – Contact Levi & Korsinsky
Class Action Filed Against Merck & Co., Inc. (MRK) Seeking Recovery for Investors - Contact Levi & Korsinsky
MRK
Published: March 18, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 18, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=136879&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Class Action Filed Against Merck & Co., Inc. (MRK) Seeking Recovery for Investors - Contact Levi & Korsinsky
Levi & Korsinsky Notifies Shareholders of Merck & Co., Inc. (MRK) of a Class Action Lawsuit and an Upcoming Deadline
MRK
Published: March 17, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 17, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=136677&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Levi & Korsinsky Notifies Shareholders of Merck & Co., Inc. (MRK) of a Class Action Lawsuit and an Upcoming Deadline
Shareholders that lost money on Merck & Co., Inc.(MRK) Urged to Join Class Action – Contact The Gross Law Firm to Learn More
MRK
Published: March 17, 2025 by: GlobeNewsWire
Sentiment: Neutral

NEW YORK, March 17, 2025 (GLOBE NEWSWIRE) -- The Gross Law Firm issues the following notice to shareholders of Merck & Co., Inc. (NYSE: MRK).

Read More
image for news Shareholders that lost money on Merck & Co., Inc.(MRK) Urged to Join Class Action – Contact The Gross Law Firm to Learn More
INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Merck & Co., Inc. of Class Action Lawsuit and Upcoming Deadlines - MRK
MRK
Published: March 17, 2025 by: PRNewsWire
Sentiment: Neutral

NEW YORK , March 17, 2025 /PRNewswire/ -- Pomerantz LLP announces that a class action lawsuit has been filed against Merck & Co., Inc. ("Merck" or the "Company") (NYSE: MRK). Such investors are advised to contact Danielle Peyton at newaction@pomlaw.com or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext.

Read More
image for news INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Merck & Co., Inc. of Class Action Lawsuit and Upcoming Deadlines - MRK
Levi & Korsinsky Announces the Filing of a Securities Class Action on Behalf of Merck & Co., Inc. (MRK) Shareholders
MRK
Published: March 17, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 17, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=136640&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Levi & Korsinsky Announces the Filing of a Securities Class Action on Behalf of Merck & Co., Inc. (MRK) Shareholders
Class Action Filed Against Merck & Co., Inc. (MRK) - April 14, 2025 Deadline to Join - Contact Levi & Korsinsky
MRK
Published: March 14, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 14, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=136097&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Class Action Filed Against Merck & Co., Inc. (MRK) - April 14, 2025 Deadline to Join - Contact Levi & Korsinsky
Contact Levi & Korsinsky by April 14, 2025 Deadline to Join Class Action Against Merck & Co., Inc. (MRK)
MRK
Published: March 13, 2025 by: GlobeNewsWire
Sentiment: Neutral

NEW YORK, March 13, 2025 (GLOBE NEWSWIRE) -- Levi & Korsinsky, LLP notifies investors in Merck & Co., Inc. ("Merck" or the "Company") (NYSE: MRK) of a class action securities lawsuit.

Read More
image for news Contact Levi & Korsinsky by April 14, 2025 Deadline to Join Class Action Against Merck & Co., Inc. (MRK)
Merck & Co., Inc. Securities Fraud Class Action Lawsuit Pending: Contact Levi & Korsinsky Before April 14, 2025 to Discuss Your Rights - MRK
MRK
Published: March 13, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 13, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=135772&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Merck & Co., Inc. Securities Fraud Class Action Lawsuit Pending: Contact Levi & Korsinsky Before April 14, 2025 to Discuss Your Rights - MRK
Merck (MRK) Is Considered a Good Investment by Brokers: Is That True?
MRK
Published: March 13, 2025 by: Zacks Investment Research
Sentiment: Positive

When deciding whether to buy, sell, or hold a stock, investors often rely on analyst recommendations. Media reports about rating changes by these brokerage-firm-employed (or sell-side) analysts often influence a stock's price, but are they really important?

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image for news Merck (MRK) Is Considered a Good Investment by Brokers: Is That True?
Merck & Co., Inc. Sued for Securities Law Violations - Contact Levi & Korsinsky Before April 14, 2025 to Discuss Your Rights - MRK
MRK
Published: March 12, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 12, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=135567&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Merck & Co., Inc. Sued for Securities Law Violations - Contact Levi & Korsinsky Before April 14, 2025 to Discuss Your Rights - MRK
Merck Announces Positive Data from Phase 3 Trials that Show the Investigational, Once-Daily, Oral, Two-Drug Regimen of Doravirine/Islatravir (DOR/ISL) Maintained HIV-1 Viral Suppression at Week 48
MRK
Published: March 12, 2025 by: Business Wire
Sentiment: Neutral

RAHWAY, N.J.--(BUSINESS WIRE)---- $MRK #MRK--Merck Announces Data from Phase 3 Trials that Show Once-Daily, Oral, Two-Drug Regimen of Doravirine/Islatravir Maintained HIV-1 Viral Suppression.

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image for news Merck Announces Positive Data from Phase 3 Trials that Show the Investigational, Once-Daily, Oral, Two-Drug Regimen of Doravirine/Islatravir (DOR/ISL) Maintained HIV-1 Viral Suppression at Week 48
Merck & Co., Inc. Sued for Securities Law Violations - Investors Should Contact Levi & Korsinsky for More Information - MRK
MRK
Published: March 11, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 11, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=135313&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Merck & Co., Inc. Sued for Securities Law Violations - Investors Should Contact Levi & Korsinsky for More Information - MRK
INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Merck & Co., Inc. of Class Action Lawsuit and Upcoming Deadlines - MRK
MRK
Published: March 11, 2025 by: PRNewsWire
Sentiment: Neutral

NEW YORK , March 11, 2025 /PRNewswire/ -- Pomerantz LLP announces that a class action lawsuit has been filed against Merck & Co., Inc. ("Merck" or the "Company") (NYSE: MRK). Such investors are advised to contact Danielle Peyton at newaction@pomlaw.com or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext.

Read More
image for news INVESTOR ALERT: Pomerantz Law Firm Reminds Investors with Losses on their Investment in Merck & Co., Inc. of Class Action Lawsuit and Upcoming Deadlines - MRK
Levi & Korsinsky Reminds Merck Investors of the Pending Class Action Lawsuit with a Lead Plaintiff Deadline of April 14, 2025 - MRK
MRK
Published: March 11, 2025 by: Accesswire
Sentiment: Neutral

NEW YORK, NY / ACCESS Newswire / March 11, 2025 / If you suffered a loss on your Merck & Co., Inc. (NYSE:MRK) investment and want to learn about a potential recovery under the federal securities laws, follow the link below for more information: https://zlk.com/pslra-1/merck-co-inc-lawsuit-submission-form?prid=135253&wire=1 or contact Joseph E. Levi, Esq.

Read More
image for news Levi & Korsinsky Reminds Merck Investors of the Pending Class Action Lawsuit with a Lead Plaintiff Deadline of April 14, 2025 - MRK

About Merck & Co., Inc. (MRK)

  • IPO Date 1978-01-13
  • Website https://www.merck.com
  • Industry Drug Manufacturers - General
  • CEO Mr. Robert M. Davis J.D.
  • Employees 73000

Merck & Co., Inc. operates as a healthcare company worldwide. It operates through two segments, Pharmaceutical and Animal Health. The Pharmaceutical segment offers human health pharmaceutical products in the areas of oncology, hospital acute care, immunology, neuroscience, virology, cardiovascular, and diabetes, as well as vaccine products, such as preventive pediatric, adolescent, and adult vaccines. The Animal Health segment discovers, develops, manufactures, and markets veterinary pharmaceuticals, vaccines, and health management solutions and services, as well as digitally connected identification, traceability, and monitoring products. It serves drug wholesalers and retailers, hospitals, and government agencies; managed health care providers, such as health maintenance organizations, pharmacy benefit managers, and other institutions; and physicians and physician distributors, veterinarians, and animal producers. The company has collaborations with AstraZeneca PLC; Bayer AG; Eisai Co., Ltd.; Ridgeback Biotherapeutics; and Gilead Sciences, Inc. to jointly develop and commercialize long-acting treatments in HIV. Merck & Co., Inc. was founded in 1891 and is headquartered in Kenilworth, New Jersey.