BLAIR WILLIAM & CO/IL

Overview

• HeadquartersDE¹

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Corporate structure

BLAIR WILLIAM & CO/IL sits at the top of its group. 4 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from major holders from Schedules 13D and 13G; stakes of 5% or more it reported on Schedules 13D and 13G (3 companies). Each entity in the chart links to its source.

Filings

23 filings to the SEC since October 2021: 23 other. The latest 20:

1. Aug 27, 2026N-PX EDGAR
2. Aug 11, 202613F-HR EDGAR
3. May 8, 202613F-HR EDGAR
4. Feb 17, 202613F-HR EDGAR
5. Nov 12, 202513F-HR EDGAR
6. Aug 13, 2025N-PX EDGAR
7. Jul 24, 202513F-HR EDGAR
8. May 9, 202513F-HR EDGAR
9. Feb 12, 202513F-HR EDGAR
10. Nov 12, 202413F-HR EDGAR
11. Aug 16, 2024N-PX EDGAR
12. Aug 12, 202413F-HR EDGAR
13. May 9, 202413F-HR EDGAR
14. Feb 12, 202413F-HR EDGAR
15. Nov 9, 202313F-HR EDGAR
16. Aug 11, 202313F-HR EDGAR
17. May 12, 202313F-HR EDGAR
18. Feb 10, 202313F-HR EDGAR
19. Nov 9, 202213F-HR EDGAR
20. Aug 10, 202213F-HR EDGAR

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Stakes it holds

BLAIR WILLIAM & CO/IL has told the SEC it owns more than 5% of 3 companies, latest first (Schedules 13D and 13G).

• AIRGAIN INCSCHEDULE 13G/A Feb 11, 2022 to Nov 14, 2025²
• Harte HanksSC 13G/A Feb 11, 2022 to Feb 12, 2024³
• OptimizeRx CorpSC 13G/A Feb 11, 2022⁴