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 1 sale; 493 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 | 8.70%3.57M shares | −1.00 ppfrom 9.70% | Feb 11, 20217 filings | Aug 13, 2026 | SEC |
| FMR LLC | 13G/A | 7.20%2.96M shares | −1.70 ppfrom 8.90% | Nov 5, 20254 filings | Nov 5, 2026 | SEC |
| Vanguard Capital Management LLC | 13G | 5.29%2.18M shares | New | Apr 30, 20261 filing | Apr 30, 2026 | 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
25 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 |
|---|---|---|---|---|---|---|
| Nov 5, 20261:24 PM ET | FMR LLCand 1 other | 13G/A | 7.20%2.96M shares | −1.70 ppfrom 8.90% | Sep 30, 2026 | SEC |
| Aug 13, 20264:05 PM ET | Kayne Anderson Rudnick Investment Management LLC | 13G/A | 8.70%3.57M shares | −1.00 ppfrom 9.70% | Jun 30, 2026 | SEC |
| Aug 6, 202610:41 AM ET | FMR LLCand 1 other | 13G/A | 8.90%3.67M shares | +2.50 ppfrom 6.40% | Jun 30, 2026 | SEC |
| May 6, 202611:35 AM ET | FMR LLCand 1 other | 13G/A | 6.40%2.65M shares | +1.30 ppfrom 5.10% | Mar 31, 2026 | SEC |
| Apr 30, 20261:06 PM ET | Vanguard Capital Management LLC | 13G | 5.29%2.18M shares | New | Mar 31, 2026 | SEC |
| 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 |
| Nov 8, 2024 | BlackRock, Inc. | 13G/AOld format | – | – | – | SEC |
| Oct 21, 2024 | BlackRock, Inc. | 13G/AOld format | – | – | – | SEC |
| Mar 11, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Kayne Anderson Rudnick Investment Management LLC | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 23, 20244:13 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Kayne Anderson Rudnick Investment Management LLC | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 23, 20233:52 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Dec 9, 2022 | Kayne Anderson Rudnick Investment Management LLC | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Kayne Anderson Rudnick Investment Management LLC | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 27, 20221:59 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 25, 20226:45 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Kayne Anderson Rudnick Investment Management LLC | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 26, 20216:54 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
40 notices from officers, directors and other affiliates planning to sell Simpson Manufacturing Co., Inc. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Sep 10, 20263:31 PM ET | Olosky MichaelOfficer · Director | 3.50K | $605.3K | Sep 10, 2026 | Fidelity Brokerage Services LLC | SEC |
| Aug 4, 20262:05 PM ET | Andrasick James SDirector | 800 | $156.5K | Aug 4, 2026 | Fidelity Brokerage Services LLC | SEC |
| Dec 12, 20253:16 PM ET | Donaldson Philip EDirector | 2.38K | $399.4K | Dec 12, 2025 | Fidelity Brokerage Services LLC | SEC |
| Nov 12, 20257:41 AM ET | Andrasick James SDirector | 600 | $102.0K | Nov 11, 2025 | Fidelity Brokerage Services LLC | SEC |
| Aug 25, 20252:05 PM ET | Andersen MichaelOfficer | 1.00K | $196.1K | Aug 25, 2025 | Fidelity Brokerage Services LLC | SEC |
| Aug 1, 20251:56 PM ET | Gilstrap JeremyOfficer | 2.50K | $445.7K | Aug 1, 2025 | Fidelity Brokerage Services LLC | SEC |
| May 19, 20252:39 PM ETAmended | Dankel RogerOfficer | 3.10K | $507.6K | May 16, 2025 | Fidelity Brokerage Services LLC | SEC |
| May 14, 202511:17 AM ET | Andrasick James SDirector | 866 | $143.2K | May 14, 2025 | Fidelity Brokerage Services LLC | SEC |
| May 1, 20251:26 PM ET | Lutz JenniferOfficer | 330 | $51.0K | May 1, 2025 | Fidelity Brokerage Services LLC | SEC |
| Mar 13, 20251:33 PM ET | Dankel RogerOfficer | 3.10K | $480.1K | Mar 13, 2025 | Fidelity Brokerage Services LLC | SEC |
| Feb 25, 20251:19 PM ET | Andersen MichaelOfficer | 1.00K | $170.0K | Feb 25, 2025 | Fidelity Brokerage Services LLC | SEC |
| Feb 20, 20253:03 PM ET | Magstadt Brian JOfficer | 1.50K | $255.9K | Feb 20, 2025 | Fidelity Brokerage Services LLC | SEC |
| Dec 4, 202411:28 AM ET | Dankel RogerOfficer | 250 | $45.8K | Dec 4, 2024 | Fidelity Brokerage Services LLC | SEC |
| Dec 3, 20243:05 PM ET | Lutz JenniferOfficer | 700 | $129.1K | Dec 3, 2024 | Fidelity Brokerage Services LLC | SEC |
| Aug 28, 202410:48 AM ET | Andrasick James SDirector | 500 | $89.4K | Aug 28, 2024 | Fidelity Brokerage Services LLC | SEC |
| Aug 26, 202412:06 PM ET | Olosky MichaelOfficer | 910 | $171.6K | Aug 26, 2024 | Charles Schwab Corp. | SEC |
| Aug 26, 202412:04 PM ET | Andersen MichaelOfficer | 1.50K | $281.2K | Aug 26, 2024 | Fidelity Brokerage Services LLC | SEC |
| Aug 26, 202410:48 AM ET | Olosky MichaelOfficer · Director | 5.96K | $1.12M | Aug 26, 2024 | Fidelity Brokerage Services LLC | SEC |
| Aug 9, 20243:34 PM ET | Lutz JenniferOfficer | 1.00K | $175.6K | Aug 9, 2024 | Fidelity Brokerage Services LLC | SEC |
| Aug 1, 202412:26 PM ET | Dankel RogerOfficer | 2.70K | $514.2K | Aug 1, 2024 | Fidelity Brokerage Services LLC | SEC |
| May 20, 20244:41 PM ET | Lutz JenniferOfficer | 750 | $128.4K | May 20, 2024 | Fidelity Brokerage Services LLC | SEC |
| May 14, 20242:43 PM ET | Dankel RogerOfficer | 2.00K | $350.3K | May 14, 2024 | Fidelity Brokerage Services LLC | SEC |
| Mar 20, 202410:02 AM ET | Dankel RogerOfficer | 850 | $168.4K | Mar 20, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
| Mar 6, 202411:57 AM ET | Burton PhillipOfficer | 2.00K | $422.8K | Mar 6, 2024 | Fidelity Brokerage Services LLC | SEC |
| Feb 20, 202411:35 AM ET | Dankel RogerOfficer | 850 | $162.2K | Feb 20, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
Showing the latest 25. See the SSD notices from the last 12 months