TriMas Corporation (TRS) Ownership
TRS ownership summary
as of October 18, 2026- Institutions
- 83.7% of shares outstanding
- Insiders
- 25.09% of shares outstanding
- Shares outstanding
- 35.9M
- Float
- 26.9M shares available to trade
- Short interest
- 16.07% 3.4M shares short
- Days to cover
- 10.72 short interest down 4.2% vs prior month
- Institutions 83.71%
- Insiders 25.09%
TRS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.05% | 2.5M | $98.1M | +33,302 (+1.3%) | June 30, 2026 |
| 2 | Dimensional Fund Advisors, Inc. | 6.30% | 2.3M | $87.6M | −420 (−0.0%) | June 30, 2026 |
| 3 | Allspring Global Investments Holdings, LLC | 5.31% | 1.9M | $73.8M | −605,526 (−24.1%) | June 30, 2026 |
| 4 | Vanguard Portfolio Management, LLC | 4.69% | 1.7M | $65.2M | −93,625 (−5.3%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 3.93% | 1.4M | $54.6M | −172,440 (−10.9%) | June 30, 2026 |
| 6 | Advisory Research Inc | 3.38% | 1.2M | $46.9M | +91,901 (+8.2%) | June 30, 2026 |
| 7 | Permian Investment Partners | 3.25% | 1.2M | $45.2M | −37,086 (−3.1%) | June 30, 2026 |
| 8 | American Century Companies Inc | 3.21% | 1.2M | $44.6M | +919,944 (+399.2%) | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 2.84% | 1.0M | $39.5M | +146,749 (+16.8%) | June 30, 2026 |
| 10 | Jefferies Financial Group Inc | 2.74% | 982K | $38.0M | −567,729 (−36.6%) | June 30, 2026 |
| 11 | Punch & Associates Inv Mgmt Inc | 2.25% | 807K | $31.3M | +562,573 (+229.9%) | June 30, 2026 |
| 12 | State Street Corp | 2.19% | 784K | $30.4M | −32,460 (−4.0%) | June 30, 2026 |
| 13 | Arnhold & S. Bleichroeder Advisers, LLC | 1.85% | 663K | $25.7M | +345,106 (+108.5%) | June 30, 2026 |
| 14 | Arrowstreet Capital Limited Partnership | 1.61% | 579K | $22.4M | +221,889 (+62.1%) | June 30, 2026 |
| 15 | Nuveen, LLC | 1.58% | 566K | $22.0M | +1,657 (+0.3%) | June 30, 2026 |
| 16 | Massachusetts Financial Services Company | 1.52% | 544K | $21.1M | −78,400 (−12.6%) | June 30, 2026 |
| 17 | Two Sigma Investments LLC | 1.26% | 453K | $17.6M | −16,966 (−3.6%) | June 30, 2026 |
| 18 | Citadel Advisors Llc | 1.21% | 432K | $16.8M | −12,507 (−2.8%) | June 30, 2026 |
| 19 | Loomis, Sayles & Company LP | 1.20% | 431K | $16.7M | −6,384 (−1.5%) | June 30, 2026 |
| 20 | Charles Schwab Investment Management Inc | 1.18% | 425K | $16.5M | −58,976 (−12.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 8 holders added 2.3M shares and 12 cut 1.7M.
TRS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Avantis US Small Cap Value ETF | 4.27% | 1.5M | $59.3M | +4,632 (+0.3%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.87% | 1.0M | $39.8M | — | August 31, 2026 |
| 3 | Allspring Special Small Cap Value A | 2.60% | 932K | $36.1M | −130,039 (−12.2%) | September 30, 2026 |
| 4 | Vanguard Small Cap Index | 2.03% | 727K | $28.2M | −14,607 (−2.0%) | September 30, 2026 |
| 5 | iShares Russell 2000 ETF | 1.95% | 700K | $27.1M | −8,064 (−1.1%) | September 30, 2026 |
| 6 | DFA US Small Cap Value I | 1.35% | 484K | $18.8M | +29,557 (+6.5%) | August 31, 2026 |
| 7 | Vanguard MStar Small Cap Value Index | 1.32% | 473K | $18.3M | +1,806 (+0.4%) | September 30, 2026 |
| 8 | Royce Small-Cap Total Return Invmt | 1.08% | 389K | $15.1M | +389,214 (0.0%) | September 30, 2026 |
| 9 | Oberweis Micro-Cap | 0.97% | 350K | $13.5M | +349,600 (0.0%) | June 30, 2026 |
| 10 | Brighthouse Small Cap Value A | 0.94% | 337K | $13.0M | −65,488 (−16.3%) | June 30, 2026 |
| 11 | MFS New Discovery Value I | 0.91% | 328K | $12.7M | −5,535 (−1.7%) | August 31, 2026 |
| 12 | DFA US Targeted Value I | 0.84% | 300K | $11.6M | — | August 31, 2026 |
| 13 | Fidelity Small Cap Index | 0.84% | 300K | $11.6M | +3,038 (+1.0%) | July 31, 2026 |
| 14 | First Eagle Small Cap Opportunity I | 0.81% | 289K | $11.2M | — | September 30, 2026 |
| 15 | iShares Russell 2000 Value ETF | 0.71% | 255K | $9.9M | +386 (+0.2%) | September 30, 2026 |
| 16 | Nuveen Quant Small Cap Equity R6 | 0.70% | 251K | $9.7M | — | August 31, 2026 |
| 17 | Lord Abbett Small Cap Value A | 0.59% | 211K | $8.2M | −1,372 (−0.6%) | August 31, 2026 |
| 18 | Dimensional US Small Cap Value ETF | 0.59% | 210K | $8.1M | — | September 24, 2026 |
| 19 | VictoryShares US Sm Md Cp Val Momt ETF | 0.53% | 190K | $7.4M | — | September 30, 2026 |
| 20 | Bridge Builder Small/Mid Cap Value | 0.52% | 188K | $7.3M | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
TRS insider transactions
latest 13| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-05 | Daniel P Tredwell | Buy | $39.38 | 60 | $2,363 |
| 2025-11-12 | Daniel P Tredwell | Buy | $31.94 | 74 | $2,364 |
| 2025-11-11 | Jeffrey A Fielkow | Buy | $31.46 | 2,000 | $62,920 |
| 2025-08-11 | Daniel P Tredwell | Buy | $35.39 | 66 | $2,336 |
| 2025-06-05 | Adrianne Shapira | Buy | $25.82 | 4,000 | $103,280 |
| 2025-06-04 | Adrianne Shapira | Buy | $26.31 | 1,200 | $31,572 |
| 2025-05-22 | Shawn Sedaghat | Buy | $26.16 | 72,937 | $1.9M |
| 2025-05-21 | Shawn Sedaghat | Buy | $25.43 | 410,172 | $10.4M |
| 2025-05-20 | Shawn Sedaghat | Buy | $25.70 | 104,957 | $2.7M |
| 2025-05-19 | Jeffrey A Fielkow | Buy | $24.98 | 500 | $12,490 |
| 2025-05-19 | Shawn Sedaghat | Buy | $25.39 | 254,400 | $6.5M |
| 2025-05-12 | Daniel P Tredwell | Buy | $24.72 | 95 | $2,348 |
| 2025-04-30 | Shawn Sedaghat | Buy | $23.83 | 123,388 | $2.9M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
TRS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns TRS
Institutional investors own 83.7% of TriMas's shares and insiders 25.09%. The largest holder is BlackRock Inc with 7.05% of the shares (2.5M), as of June 30, 2026. Among the top 20 institutions, 8 added shares and 12 reduced their stake in the latest filings. Short interest is 16.07% of the float, or 10.72 days of average trading volume. The share count fell 11.5% since 2014.
Related: TRS analyst forecast, TRS key metrics, TRS dividend history. See the TRS stock overview for the latest quote and news.
TRS ownership FAQ
Who owns the most TriMas stock?
The largest shareholders of TriMas are BlackRock Inc (7.05%), Dimensional Fund Advisors, Inc. (6.30%), Allspring Global Investments Holdings, LLC (5.31%), Vanguard Portfolio Management, LLC (4.69%), Vanguard Capital Management, LLC (3.93%).
What percentage of TriMas is owned by institutions?
Institutions hold 83.7% of TriMas's shares outstanding; insiders hold 25.09%.
Which funds own TriMas?
The largest fund holders of TriMas are Avantis US Small Cap Value ETF (4.27%), Vanguard MStar Total Stk Mkt Idx Invest (2.87%), Allspring Special Small Cap Value A (2.60%), Vanguard Small Cap Index (2.03%), iShares Russell 2000 ETF (1.95%).
What is TriMas's short interest?
3.4M shares of TriMas were sold short, 16.07% of the float; at the average daily volume it would take 10.72 days to cover.
Are insiders buying or selling TriMas?
Of the latest 13 reported insider transactions in TriMas (since April 30, 2025), 13 were purchases and 0 were sales.
How many shares of TriMas are outstanding?
TriMas has 35.9M shares outstanding, of which 26.9M are in the public float.