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2,406 filed that day · 5 that mattered · Source: SEC EDGAR

The day in numbers

2,406filings
1738-Ks
753insider filings

Top stories

  • 5 new activist stakes (Schedule 13D) filed on Sep 17.

    How we counted

    SC 13D and SCHEDULE 13D filings, not amendments, accepted on 2026-09-17 (Eastern time). Shown when the count is at least 3.

New activist stakes (13D) (5)

Ranked by importance; times are when EDGAR accepted the filing, Eastern Time.

  1. Orasure Technologies OSUR Schedule 13D

    Islet Management reports a stake in Orasure Technologies

    Schedule 13D on EDGAR
  2. Vulcan Infrastructure & Power VIP Schedule 13D

    George Ted Rogers III reports a stake in Vulcan Infrastructure & Power

    Schedule 13D on EDGAR
  3. Tessera Defense & Homeland Security HLSQ Schedule 13D

    Mayers Ventures reports a stake in Tessera Defense & Homeland Security

    Schedule 13D on EDGAR
  4. FibroBiologics FBLG Schedule 13D

    Hamid Khoja reports a stake in FibroBiologics

    Schedule 13D on EDGAR
  5. 111 YI Schedule 13D

    Yu Gang reports a stake in 111

    Schedule 13D on EDGAR

Picked by fixed rules from filings SEC Tracker has read: MAJOR filings, offerings, listing notices, new going-concern warnings, red-flag 8-K items (3.01 listing notices, 4.01 auditor changes and 4.02 restatements first, then 1.03, 2.04, 2.06, and 5.02 when the CEO or CFO leaves with no successor named) and new Schedule 13Ds. Each line is the filing's summary headline or fact line. Counts in the top stories are computed from stored data; no model writes them. Not affiliated with the U.S. SEC. Not investment advice.