Comparable stake leader
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
SEC ownership of Simpson Manufacturing Co., Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000920371.
Disclosed value leader
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
Comparable rows
3/50
Latest evidence
30 Sep 2026
- Public ticker
- SSD on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
3 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000920371
- Issuer location
- Pleasanton, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Simpson Manufacturing Co., Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
KAYNE ANDERSON RUDNICK IN...
Disclosed value leader
KAYNE ANDERSON RUDNICK IN...
Comparable rows
3/50
Latest evidence
30 Sep 2026
13D/G
13F
3/4/5
Lead comparable stake: 8.7%
47 rows are not safely comparable across share classes.
13D/G row: KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC leads the comparable SEC ownership view at 8.7%.
3 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 3
KAYNE ANDERSON RUDNICK INVESTMENT...
8.7%
FMR LLC
7.2%
VANGUARD CAPITAL MANAGEMENT LLC
5.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC |
13D/G
|
8.7%
Reported 13D/G
· 30 Jun 2026
|
$716,267,514
3,568,491 shares
|
-$90,209,991 | 30 Jun 2026 |
| FMR LLC |
13D/G
|
7.2%
Reported 13D/G
· 30 Sep 2026
|
$508,264,486
2,955,885 shares
|
-$122,714,181 | 30 Sep 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.3%
Reported 13D/G
· 31 Mar 2026
|
$416,981,082
2,182,233 shares
|
$0 | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$321,858,461
1,883,535 shares
|
— | 30 Sep 2026 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$268,415,912
1,570,786 shares
|
— | 30 Sep 2026 |
| MORGAN STANLEY |
13F
Company
|
—
denominator unverified
|
$207,829,346
1,216,227 shares
|
— | 30 Sep 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
—
denominator unverified
|
$162,075,604
948,411 shares
|
— | 30 Sep 2026 |
| Baker Avenue Asset Management, LP |
13F
Company
|
—
denominator unverified
|
$156,265,659
914,476 shares
|
— | 30 Sep 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$1,161,162.
Buys
$0
Insiders: 0
Sells
$1,161,162
Insiders: 3
Net
-$1,161,162
Shares: -6,677
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 6,677
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 3,502 | $0 | $605,286 | -$605,286 |
| 3-6 | 0 | 800 | $0 | $156,496 | -$156,496 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 2,375 | $0 | $399,380 | -$399,380 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 23 reporting-owner rows connected to Simpson Manufacturing Co., Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
23
Largest Forms 3/4/5 holder
Karen Winifred Colonias
Net 12M change
-$1.16M
Full value: -$1,161,162 · USD · 12-month changeLatest report
10 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Karen Winifred Colonias | Director | $9,589,395 | Mixed | 25 Apr 2023 | ||
| Michael L. Olosky | President and CEO, Director | $8,883,630 | -$605,286 | -6.4% | Filing P/S | 10 Sep 2026 |
| Brian J. Magstadt | Chief Financial Officer | $5,999,716 | Mixed | 15 Feb 2024 | ||
| Gary M. Cusumano | Director | $4,697,269 | Mixed | 01 May 2024 | ||
| Roger Dankel | EVP, NA Sales | $4,062,468 | Mixed | 10 Dec 2024 | ||
| Jennifer Chatman | Director | $2,817,522 | Filing P/S | 12 Feb 2024 | ||
| Greenway Robin Macgillivray | Director | $2,596,104 | Mixed | 26 Apr 2023 | ||
| Jeremy Gilstrap | EVP, Innovation | $2,502,904 | Mixed | 17 Feb 2026 | ||
| Celeste Volz Ford | Director | $2,421,901 | Mixed | 06 May 2026 | ||
| Michael Andersen | EVP, Europe | $2,223,139 | Mixed | 17 Feb 2026 | ||
| Phillip Burton | EVP, North America | $2,070,662 | Mixed | 17 Feb 2026 | ||
| Kevin Lee Swartzendruber | Senior VP of Finance | $1,372,018 | Mixed | 15 Feb 2024 | ||
| Philip E. Donaldson | Director | $1,203,914 | -$399,380 | -25% | Mixed | 06 May 2026 |
| James S. Andrasick | Director | $1,193,712 | -$156,496 | -12% | Mixed | 04 Aug 2026 |
| Udit Mehta | Chief Technology Officer | $1,042,959 | Mixed | 17 Feb 2026 | ||
| Cassandra Payton | EVP, General Counsel | $979,838 | Mixed | 17 Feb 2026 | ||
| Matt Dunn | Chief Financial Officer | $979,629 | Mixed | 17 Feb 2026 | ||
| Kenneth D. Knight | Director | $819,485 | Mixed | 06 May 2026 | ||
| Jennifer Lutz | EVP, Human Resources | $625,059 | Filing P/S | 01 May 2025 | ||
| Felica Coney | Director | $518,120 | Mixed | 06 May 2026 |
Recent insider transactions for Simpson Manufacturing Co., Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Michael Olosky | SSD | Common Stock | Sale | -6.38% | -$605,286 | $172.84 | -3,502 | 51,398 | 10 Sep 2026 | Direct |
| Nozomi Bullock | SSD | Common Stock | Discretionary transaction in accordance with Rule 16b-3(f) resulting in acquisition or disposition of issuer securities | -100% | -21.81 | 0 | 18 Aug 2026 | By Trust (PSP) | ||
| James S. Andrasick | SSD | Common Stock | Sale | -92.9% | -$156,496 | $195.62 | -800 | 61 | 04 Aug 2026 | Direct |
| Kenneth D. Knight | SSD | Common Stock | Award | 16.6% | 678 | 4,775 | 06 May 2026 | Direct | ||
| Celeste Volz Ford | SSD | Common Stock | Award | 5.05% | 678 | 14,112 | 06 May 2026 | Direct | ||
| Angela C. Drake | SSD | Common Stock | Award | 66.9% | 678 | 1,691 | 06 May 2026 | Direct | ||
| Philip E. Donaldson | SSD | Common Stock | Award | 15.3% | 929 | 7,015 | 06 May 2026 | Direct | ||
| Felica Coney | SSD | Common Stock | Award | 29% | 678 | 3,019 | 06 May 2026 | Direct | ||
| Chau Banks | SSD | Common Stock | Award | 29% | 678 | 3,019 | 06 May 2026 | Direct | ||
| James S. Andrasick | SSD | Common Stock | Award | 370.5% | 678 | 861 | 06 May 2026 | Direct | ||
| Cassandra Payton | SSD | Common Stock | Tax liability | -13.8% | -749 | 4,688 | 17 Feb 2026 | Direct | ||
| Cassandra Payton | SSD | Common Stock | Award | 21.5% | 963 | 5,437 | 17 Feb 2026 | Direct | ||
| Udit Mehta | SSD | Common Stock | Tax liability | -7.18% | -386 | 4,990 | 17 Feb 2026 | Direct | ||
| Jeremy Gilstrap | SSD | Common Stock | Tax liability | -3.69% | -418 | 10,900 | 17 Feb 2026 | Direct | ||
| Jeremy Gilstrap | SSD | Common Stock | Award | 27.6% | 2,449 | 11,318 | 17 Feb 2026 | Direct | ||
| Matt Dunn | SSD | Common Stock | Tax liability | -3.8% | -185 | 4,687 | 17 Feb 2026 | Direct | ||
| Phillip Burton | SSD | Common Stock | Tax liability | -3.36% | -344 | 9,907 | 17 Feb 2026 | Direct | ||
| Phillip Burton | SSD | Common Stock | Award | 46.4% | 3,248 | 10,251 | 17 Feb 2026 | Direct | ||
| Michael Andersen | SSD | Common Stock | Award | 41.2% | 3,624 | 12,417 | 17 Feb 2026 | Direct | ||
| Michael Olosky | SSD | Common Stock | Tax liability | -2.8% | -1,582 | 54,896 | 17 Feb 2026 | Direct | ||
| Michael Olosky | SSD | Common Stock | Award | 43.6% | 17,140 | 56,478 | 17 Feb 2026 | Direct | ||
| Nozomi Bullock | SSD | Common Stock | Award | 773 | 773 | 27 Jan 2026 | Direct | |||
| Matt Dunn | SSD | Common Stock | Award | 121% | 2,667 | 4,872 | 27 Jan 2026 | Direct | ||
| Udit Mehta | SSD | Common Stock | Award | 22% | 970 | 5,376 | 27 Jan 2026 | Direct | ||
| Cassandra Payton | SSD | Common Stock | Award | 44.6% | 1,379 | 4,474 | 27 Jan 2026 | Direct | ||
| Phillip Burton | SSD | Common Stock | Award | 27.6% | 1,515 | 7,003 | 27 Jan 2026 | Direct | ||
| Jeremy Gilstrap | SSD | Common Stock | Award | 13.8% | 1,075 | 8,869 | 27 Jan 2026 | Direct | ||
| Michael Andersen | SSD | Common Stock | Award | 12.6% | 983 | 8,793 | 27 Jan 2026 | Direct | ||
| Michael Olosky | SSD | Common Stock | Award | 31.8% | 9,480 | 39,338 | 27 Jan 2026 | Direct | ||
| Philip E. Donaldson | SSD | Common Stock | Sale | -28.1% | -$399,380 | $168.16 | -2,375 | 6,086 | 12 Dec 2025 | Direct |
* marks a reported price that did not pass the local price check.