TriMas Corporation
Ownership
Ownership Structure
Who owns TriMas Corporation (TRS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 74.9% of the shares are freely tradable; institutional investors hold 99.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.05 | 2,530,345 | +1.3 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 6.30 | 2,259,471 | +0.0 | 06/30/2026 |
| Allspring Global Investments Holdings, LLC | 5.31 | 1,904,393 | -24.1 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 4.69 | 1,681,687 | -5.3 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.93 | 1,408,899 | -10.9 | 06/30/2026 |
| Advisory Research Inc | 3.38 | 1,211,587 | +8.2 | 06/30/2026 |
| Permian Investment Partners | 3.25 | 1,165,414 | -3.1 | 06/30/2026 |
| American Century Companies Inc | 3.21 | 1,150,388 | +399.2 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Avantis US Small Cap Value ETF | 4.27 | 1,530,326 | +0.3 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.87 | 1,027,954 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Sedaghat Shawn | Director | 4,179,566 | 163,838,987 $ | Oct 13, 2026 | direct |
| Tredwell Daniel P | Director | 63,522 | 2,490,048 $ | Aug 12, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 13, 2026 | Sedaghat Shawn | Director | Other | 651 | 38.40 | 24,998 |
| Aug 12, 2026 | Tredwell Daniel P | Director | Buy | 64 | 39.63 | 2,536 |
| Jul 14, 2026 | Sedaghat Shawn | Director | Other | 615 | 40.64 | 24,994 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.