Company · HKHC · CIK 88000

Horizon Kinetics Holding Corp (HKHC) SEC filings and CIK.

HKHC’s SEC Central Index Key (CIK) is 0000088000, or 88000 without leading zeros. The SEC’s ticker file lists it as Horizon Kinetics Holding Corp.

Ticker: HKHC
CIK: 0000088000
Other tickers: None
Insider transactions, Q3 2026: 10

Insider trading

In Q3 2026, insiders at Horizon Kinetics Holding Corp reported 10 non-derivative transactions on 9 Forms 3, 4 and 5, including 10 open-market purchases and 0 sales. See every HKHC 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 HKHC SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=88000&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/88000" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/88000?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · Horizon Kinetics Holding Corp on SEC.gov

Questions

What is HKHC’s CIK number?

HKHC’s SEC Central Index Key (CIK) is 0000088000, or 88000 without leading zeros. The SEC’s ticker file lists it as Horizon Kinetics Holding Corp.

How do I find Horizon Kinetics Holding Corp’s 10-K?

Request /api/v1/filings?cik=88000&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/hkhc.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.