Join

Compare · MRK vs SLS

MRK vs SLS

Side-by-side comparison of Merck & Company Inc. (MRK) and SELLAS Life Sciences Group Inc. (SLS): market cap, price performance, sector, and recent activity on the wire.

Summary

  • Both MRK and SLS operate in Biotechnology: Pharmaceutical Preparations (Health Care), so they compete in similar markets.
  • MRK is the larger of the two at $298.33B, about 194.9x SLS ($1.53B).
  • Over the past year, MRK is up 51.3% and SLS is up 421.0% - SLS leads by 369.7 points.
  • MRK has been more active in the news (26 items in the past 4 weeks vs 1 for SLS).
  • MRK has more recent analyst coverage (25 ratings vs 1 for SLS).
PerformanceMRK+51.31%SLS+421.02%
2025-06-09+0.00%2026-06-08
MetricMRKSLS
Company
Merck & Company Inc.
SELLAS Life Sciences Group Inc.
Price
$119.99-0.74%
$8.18-0.49%
Market cap
$298.33B
$1.53B
1M return
+6.83%
+65.59%
1Y return
+51.31%
+421.02%
Industry
Biotechnology: Pharmaceutical Preparations
Biotechnology: Pharmaceutical Preparations
Exchange
NYSE
NASDAQ
IPO
News (4w)
26
1
Recent ratings
25
1
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.

SLS

SELLAS Life Sciences Group Inc.

SELLAS Life Sciences Group, Inc., a late-stage biopharmaceutical company, focuses on the development of novel cancer immunotherapies for various cancer indications in the United States. The company's lead product candidate is galinpepimut-S (GPS), a wilms tumor 1 targeting peptide-based cancer immunotherapeutic agent, which is in Phase III clinical trials for the treatment of acute myeloid leukemia; and in Phase 1/2 clinical trials for the treatment for ovarian cancer. It also develops nelipepimut-S, a cancer immunotherapy that is in Phase 2b clinical trials for the treatment of early stage breast cancer. The company has strategic collaboration with Merck & Co., Inc. to evaluate GPS as it is administered in combination with PD1 blocker pembrolizumab in a Phase 1/2 clinical trial enrolling patients in up to five cancer indications, including hematologic malignancies and solid tumors. SELLAS Life Sciences Group, Inc. was founded in 2012 and is headquartered in New York, New York.