Company · HMH · CIK 2021880

HMH Holding Inc (HMH) SEC filings and CIK.

HMH’s SEC Central Index Key (CIK) is 0002021880, or 2021880 without leading zeros. The SEC’s ticker file lists it as HMH Holding Inc.

Ticker: HMH
CIK: 0002021880
Other tickers: None
Insider transactions, Q3 2026: 21

Insider trading

In Q3 2026, insiders at HMH Holding Inc reported 21 non-derivative transactions on 14 Forms 3, 4 and 5, including 0 open-market purchases and 0 sales. See every HMH 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 HMH SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=2021880&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/2021880" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/2021880?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · HMH Holding Inc on SEC.gov

Questions

What is HMH’s CIK number?

HMH’s SEC Central Index Key (CIK) is 0002021880, or 2021880 without leading zeros. The SEC’s ticker file lists it as HMH Holding Inc.

How do I find HMH Holding Inc’s 10-K?

Request /api/v1/filings?cik=2021880&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/hmh.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.