Simpson Manufacturing Co., Inc.
SSD- Exchange
- NYSE
- Industry
- Cutlery, Handtools & General Hardware
- SEC CIK
- 0000920371
In the last 90 days, Simpson Manufacturing Co., Inc. insiders filed 0 open-market purchases and 2 sales; 488 institutions reported holding it in 13F filings for Q2 2026, worth $8.59B in total; ValueAct Capital is the only superinvestor holding it.
Holders of 5% or more of SSD
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Simpson Manufacturing Co., Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Kayne Anderson Rudnick Investment Management LLC | 13G/A | 9.70%4.02M shares | – | Feb 13, 20261 filing | Feb 13, 2026 | SEC |
| FMR LLC | 13G | 5.10%2.11M shares | New | Nov 5, 20251 filing | 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
3 Schedule 13D and 13G filings on Simpson Manufacturing Co., Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 27, 20261:02 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 13, 20264:05 PM ET | Kayne Anderson Rudnick Investment Management LLC | 13G/A | 9.70%4.02M shares | – | Dec 31, 2025 | SEC |
| Nov 5, 202511:44 AM ET | FMR LLCand 1 other | 13G | 5.10%2.11M shares | New | Sep 30, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Simpson Manufacturing Co., Inc. shares.
No Form 144 notices for Simpson Manufacturing Co., Inc. are on file.