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Compare · MRK vs RYTM

MRK vs RYTM

Side-by-side comparison of Merck & Company Inc. (MRK) and Rhythm Pharmaceuticals Inc. (RYTM): market cap, price performance, sector, and recent activity on the wire.

Summary

  • Both MRK and RYTM operate in Biotechnology: Pharmaceutical Preparations (Health Care), so they compete in similar markets.
  • MRK is the larger of the two at $295.19B, about 50.1x RYTM ($5.89B).
  • Over the past year, MRK is up 50.7% and RYTM is up 28.8% - MRK leads by 21.9 points.
  • MRK has been more active in the news (27 items in the past 4 weeks vs 6 for RYTM).
  • Both have 25 recent analyst ratings on file.
PerformanceMRK+50.70%RYTM+28.82%
2025-06-09+0.00%2026-06-08
MetricMRKRYTM
Company
Merck & Company Inc.
Rhythm Pharmaceuticals Inc.
Price
$119.49-1.15%
$86.03-0.47%
Market cap
$295.19B
$5.89B
1M return
+6.40%
-10.65%
1Y return
+50.70%
+28.82%
Industry
Biotechnology: Pharmaceutical Preparations
Biotechnology: Pharmaceutical Preparations
Exchange
NYSE
NASDAQ
IPO
2017
News (4w)
27
6
Recent ratings
25
25
MRK

Merck & Company Inc.

Merck & Co., Inc. operates as a healthcare company worldwide. It operates through two segments, Pharmaceutical and Animal Health segments. The Pharmaceutical segment offers human health pharmaceutical products in the areas of oncology, hospital acute care, immunology, neuroscience, virology, cardiovascular, diabetes, and women's health, as well as vaccine products. The Animal Health segment provides discovers, develops, manufactures, and markets a range of veterinary pharmaceuticals, vaccines, and health management solutions and services, as well as a suite of digitally connected identification, traceability, and monitoring products. The company has collaborations with AstraZeneca PLC; Bayer AG; Eisai Co., Ltd.; and Ridgeback Biotherapeutics. 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 collaboration agreement with Gilead Sciences, Inc. to co-develop and co-commercialize long-acting investigational treatment combinations of Lenacapavir and Islatravir in HIV; Amathus Therapeutics to develop treatments for neurodegenerative diseases; and Linnaeus Therapeutics, Inc. to evaluate LNS8801 in combination with KEYTRUDA for patients with advanced cancer. It also has a collaboration with Biomed X Gmbh for building on ongoing research projects in the fields of oncology (DNA damage response and RNA splicing) and autoimmunity (intestinal epithelial barrier in autoimmune diseases); and a collaboration agreement with NGM Biopharmaceuticals, Inc. to focus primarily on the development of novel medicines for unmet patient needs in retinal and CVM diseases, including heart failure. Merck & Co., Inc. was founded in 1891 and is headquartered in Kenilworth, New Jersey.

RYTM

Rhythm Pharmaceuticals Inc.

Rhythm Pharmaceuticals, Inc., a commercial-stage biopharmaceutical company, focuses on the development and commercialization of therapeutics for the treatment of rare genetic diseases of obesity. The company's lead product candidate is IMCIVREE, a potent melanocortin-4 receptor for the treatment of pro-opiomelanocortin (POMC), proprotein convertase subtilisin/kexin type 1, leptin receptor (LEPR) deficiency obesity, and Bardet-Biedl and Alström syndrome. It is also developing setmelanotide, which is in Phase II clinical trials for treating POMC or LEPR heterozygous deficiency obesities, steroid receptor coactivator 1 deficiency obesity, SH2B1 deficiency obesity, MC4 receptor deficiency obesity, Smith-Magenis syndrome obesity, POMC epigenetic disorders, and other MC4R disorders. Rhythm Pharmaceuticals, Inc. has a collaborative research agreement with the Clinical Registry Investigating Bardet-Biedl Syndrome. The company was formerly known as Rhythm Metabolic, Inc. and changed its name to Rhythm Pharmaceuticals, Inc. in October 2015. Rhythm Pharmaceuticals, Inc. was founded in 2008 and is headquartered in Boston, Massachusetts.

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