Company · MRK · CIK 310158

Merck & Co., Inc. (MRK) SEC filings and CIK.

MRK’s SEC Central Index Key (CIK) is 0000310158, or 310158 without leading zeros. The SEC’s ticker file lists it as Merck & Co., Inc..

Ticker: MRK
CIK: 0000310158
Other tickers: None
Insider transactions, Q3 2026: 25

Insider trading

In Q3 2026, insiders at Merck & Co., Inc. reported 25 non-derivative transactions on 11 Forms 3, 4 and 5, including 0 open-market purchases and 17 sales. See every MRK insider transaction →

Recent filings we observed

No filings for this CIK appear in our current observation window. The full history is available from the filings endpoint below and on SEC.gov.

Get MRK SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=310158&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/310158" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/310158?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · Merck & Co., Inc. on SEC.gov

Questions

What is MRK’s CIK number?

MRK’s SEC Central Index Key (CIK) is 0000310158, or 310158 without leading zeros. The SEC’s ticker file lists it as Merck & Co., Inc..

How do I find Merck & Co., Inc.’s 10-K?

Request /api/v1/filings?cik=310158&form=10-K, or open the company’s EDGAR page and filter by 10-K. Foreign issuers file 20-F or 40-F instead.

Ticker and CIK: SEC company_tickers.json, cached 2026-11-02. Tickers can move between entities; the CIK identifies the filer.

Plain-text version for agents and LLMs: /companies/mrk.md

Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.