As of November 6, 2026, Simpson Manufacturing Co., Inc. is a publicly traded company (NYSE: SSD); its largest reported holder is Kayne Anderson Rudnick, with 8.7% on Schedule 13G/A of August 13, 2026, then Fidelity (FMR) (7.2%). The largest insider holding is Michael Olosky, the chief executive and president, with 51,398 shares (0.13% of shares outstanding), per Form 4 of September 11, 2026 (Schedule 13G/A, August 13, 2026).
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Is Simpson Manufacturing Co., Inc. a real, registered company?
- Simpson Manufacturing Co., Inc. files with the SEC under CIK 920371 (its SEC filings).
- Its shares are listed under the ticker SSD on NYSE (SEC company record).
- Incorporated in Delaware; business address in Pleasanton, California, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under SIMPSON MANUFACTURING CO in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Fidelity (FMR) (filed 2026-11-05).
Who are Simpson Manufacturing Co., Inc.'s owners and officers?
Simpson Manufacturing Co., Inc.: incorporated in Delaware; business address in Pleasanton, California; industry Cutlery, Handtools & General Hardware (Schedule 13G/A, 2026-11-05).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-11-05 | Fmr LLC | 7.2% |
| Schedule 13G/A, 2026-08-13 | Kayne Anderson Rudnick Investment Management, LLC | 8.7% |
| Schedule 13G/A, 2026-08-06 | Fmr LLC | 8.9% |
| Schedule 13G/A, 2026-05-06 | Fmr LLC | 6.4% |
| Schedule 13G, 2026-04-30 | Vanguard Capital Management | 5.29% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-02-13 | Kayne Anderson Rudnick Investment Management, LLC | 9.7% |
| Schedule 13G, 2025-11-05 | Fmr LLC | 5.1% |
Questions about who owns Simpson Manufacturing Co., Inc.
Who owns Simpson Manufacturing Co., Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Simpson Manufacturing Co., Inc.: Kayne Anderson Rudnick Investment Management, LLC (8.7%, Schedule 13G/A, filed 2026-08-13), Fmr LLC (7.2%, Schedule 13G/A, filed 2026-11-05) and Vanguard Capital Management (5.29%, Schedule 13G, filed 2026-04-30).
Who are the largest shareholders of Simpson Manufacturing Co., Inc.?
By the share each holder's latest filing reports, the largest holders of Simpson Manufacturing Co., Inc. on this page are Kayne Anderson Rudnick Investment Management, LLC (8.7%), Fmr LLC (7.2%) and Vanguard Capital Management (5.29%).
When did Kayne Anderson Rudnick Investment Management, LLC buy into Simpson Manufacturing Co., Inc.?
The filings give report dates, not purchase dates. The earliest filing from Kayne Anderson Rudnick Investment Management, LLC on this page is the Schedule 13G/A, filed 2026-02-13, reporting 9.7%; its latest, Schedule 13G/A filed 2026-08-13, reports 8.7%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 8 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Simpson Manufacturing Co., Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Which insiders own Simpson Manufacturing Co., Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive and president: 51,398 shares (0.13% of shares outstanding) (Form 4, 2026-09-11).
- , the executive vice president and na sales: 22,192 shares (0.05% of shares outstanding) (Form 4, 2024-12-12).
- , a director: 14,112 shares (0.03% of shares outstanding) (Form 4, 2026-05-08).
- , the executive vice president and europe: 12,417 shares (0.03% of shares outstanding) (Form 4, 2026-02-18).
- , the executive vice president and innovation: 12,155 shares (0.03% of shares outstanding), 10,900 held directly and 1,255 indirectly (Form 4, 2026-02-18).
Shares outstanding: 40,541,461 as of 2026-11-03, from the company's latest SEC cover page.
How much has Simpson Manufacturing Co., Inc. raised?
No fundraising or offering filing from Simpson Manufacturing Co., Inc. is on file with us.
Keep reading
More on Simpson Manufacturing Co., Inc. and the records around it.
Companies that share a holder
- Kayne Anderson Rudnick Investment Management, LLC also filed stake reports on 53 other companies: Andersen Group Inc. (Aug 2026), Bright Horizons Family Solutions Inc (Aug 2026), Choice Hotels International Inc (Aug 2026)
- FMR LLC also filed stake reports on 761 other companies: ASPEN NEUROSCIENCE INC (Nov 2026), AVALO THERAPEUTICS INC (Nov 2026), BRAZE INC (Nov 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
Related pages
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