Heidrick & Struggles International Inc
HSIIDelisted Dec 10, 2025- Industry
- Services-Employment Agencies
- SEC CIK
- 0001066605
Heidrick & Struggles International Inc was delisted on Dec 10, 2025; its insiders filed their last Form 4 on Dec 10, 2025; 213 institutions reported holding it in 13F filings for Q3 2025, worth $979.9M in total; no superinvestor held it.
Holders of 5% or more of HSII
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Heidrick & Struggles International Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 15.80%3.22M shares | – | Apr 30, 20251 filing | Apr 30, 2025 | SEC |
| Mak Capital One LLC | 13D | 5.80%1.21M shares | +0.53 ppfrom 5.27% | Apr 7, 20252 filings | Nov 5, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
6 Schedule 13D and 13G filings on Heidrick & Struggles International Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Feb 12, 20262:14 PM ET | Renaissance Technologies LLCand 1 other | 13G/A | 0.00%0 shares | –Below 5% | Dec 31, 2025 | SEC |
| Jan 21, 20261:21 PM ET | Dimensional Fund Advisors LP | 13G/A | 0.00%0 shares | −5.40 ppfrom 5.40%Below 5% | Dec 31, 2025 | SEC |
| Nov 5, 20255:24 PM ET | Mak Capital One LLCand 2 others | 13D | 5.80%1.21M shares | +0.53 ppfrom 5.27% | Oct 27, 2025 | SEC |
| Oct 9, 20251:48 PM ET | Dimensional Fund Advisors LP | 13G/A | 5.40%1.12M shares | – | Sep 30, 2025 | SEC |
| Apr 30, 202510:03 AM ET | BlackRock, Inc. | 13G/A | 15.80%3.22M shares | – | Mar 31, 2025 | SEC |
| Apr 7, 20254:36 PM ET | Mak Capital One LLCand 2 others | 13G | 5.27%1.08M shares | New | Apr 3, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Heidrick & Struggles International Inc shares.
No Form 144 notices for Heidrick & Struggles International Inc are on file.