TriMas Corporation
US ˙ NasdaqGS ˙ US8962152091

SecurityTRS / TriMas Corporation
InstitutionNorthern Trust Corp
Latest Disclosed Ownership304,574 shares
Latest Disclosed Value $ 10,946,390
Northern Trust Corp reports 4.20% increase in ownership of TRS / TriMas Corporation

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 304,574 shares of TriMas Corporation (US:TRS) valued at $10,946,390 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 292,307 shares of TriMas Corporation. This represents a change in shares of 4.20% during the quarter. The current value of the position is $11,930,164 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F TRIMAS COM NEW 896215209 304,574 12,267 4.20 10,946 5.64 0.0003
2026-02-17 2025-12-31 13F TRIMAS COM NEW 896215209 292,307 -29,286 -9.11 10,362 -16.61 0.0003
2025-11-14 2025-09-30 13F TRIMAS COM NEW 896215209 321,593 -10,684 -3.22 12,426 30.72 0.0004
2025-08-13 2025-06-30 13F TRIMAS COM NEW 896215209 332,277 -52,645 -13.68 9,506 5.41 0.0013
2025-05-13 2025-03-31 13F TRIMAS COM NEW 896215209 384,922 -13,291 -3.34 9,019 -7.90 0.0013
2025-02-14 2024-12-31 13F TRIMAS COM NEW 896215209 398,213 35,798 9.88 9,792 5.84 0.0014
2024-11-13 2024-09-30 13F TRIMAS COM 896215209 362,415 -12,240 -3.27 9,252 -3.38 0.0015
2024-08-14 2024-06-30 13F TRIMAS COM 896215209 374,655 -13,498 -3.48 9,576 -7.70 0.0016
2024-05-14 2024-03-31 13F TRIMAS COM 896215209 388,153 -8,709 -2.19 10,375 3.21 0.0018
2024-02-13 2023-12-31 13F TRIMAS COM 896215209 396,862 -5,430 -1.35 10,053 0.92 0.0018
2023-11-13 2023-09-30 13F TRIMAS COM 896215209 402,292 3,765 0.94 9,961 -9.08 0.0019
2023-08-11 2023-06-30 13F TRIMAS COM 896215209 398,527 -4,004 -0.99 10,956 -2.31 0.0021
2023-05-15 2023-03-31 13F TRIMAS COM 896215209 402,531 -5,387 -1.32 11,215 -0.89 0.0022
2023-02-13 2022-12-31 13F TRIMAS COM 896215209 407,918 1,627 0.40 11,316 11.09 0.0024
2022-11-14 2022-09-30 13F TRIMAS COM 896215209 406,291 -8,406 -2.03 10,185 -11.30 0.0023
2022-08-12 2022-06-30 13F TRIMAS COM 896215209 414,697 -7,062 -1.67 11,482 -15.16 0.0025
2022-05-13 2022-03-31 13F TRIMAS COM 896215209 421,759 -12,244 -2.82 13,534 -15.72 0.0024
2022-02-08 2021-12-31 13F TRIMAS COM 896215209 434,003 -4,851 -1.11 16,059 13.09 0.0026
2021-11-15 2021-09-30 13F TRIMAS COM 896215209 438,854 -18,562 -4.06 14,200 2.36 0.0025
2021-08-13 2021-06-30 13F TRIMAS COM NEW 896215209 457,416 2,954 0.65 13,873 0.68 0.0024
2021-05-12 2021-03-31 13F TRIMAS COM NEW 896215209 454,462 -42,311 -8.52 13,779 -12.41 0.0026
2021-02-11 2020-12-31 13F TRIMAS COM NEW 896215209 496,773 -50,831 -9.28 15,732 26.01 0.0031
2020-11-16 2020-09-30 13F TRIMAS COM NEW 896215209 547,604 -18,968 -3.35 12,485 -7.98 0.0027
2020-08-14 2020-06-30 13F TRIMAS COM 896215209 566,572 -22,537 -3.83 13,568 -0.30 0.0032
2020-05-14 2020-03-31 13F TRIMAS COM NEW 896215209 589,109 -1,120 -0.19 13,609 -26.59 0.0039
2020-02-14 2019-12-31 13F TRIMAS COM NEW 896215209 590,229 -86,077 -12.73 18,539 -10.56 0.0041
2019-11-13 2019-09-30 13F TRIMAS COM 896215209 676,306 85,562 14.48 20,729 13.30 0.0050
2019-08-13 2019-06-30 13F TRIMAS COM NEW 896215209 590,744 12,601 2.18 18,296 4.69 0.0043
2019-05-13 2019-03-31 13F TRIMAS COM NEW 896215209 578,143 -517 -0.09 17,476 10.66 0.0043
2019-02-12 2018-12-31 13F TRIMAS COM NEW 896215209 578,660 -1,936 -0.33 15,792 -10.53 0.0044
2018-11-14 2018-09-30 13F TRIMAS COM NEW 896215209 580,596 10,493 1.84 17,650 5.30 0.0043
2018-09-18 2018-06-30 13F/A-1 TRIMAS COM NEW 896215209 570,103 8,103 1.44 16,761 13.62 0.0043
2018-08-14 2018-06-30 13F TRIMAS COM NEW 896215209 573,017 11,017 16,847
2018-05-09 2018-03-31 13F TRIMAS COM NEW 896215209 562,000 10,047 1.82 14,752 -0.08 0.0038
2018-02-14 2017-12-31 13F TRIMAS COM NEW 896215209 551,953 -4,443 -0.80 14,764 -1.72 0.0037
2017-11-13 2017-09-30 13F TRIMAS COM NEW 896215209 556,396 -14,544 -2.55 15,023 26.19 0.0039
2017-08-11 2017-06-30 13F TRIMAS COM 896215209 570,940 24,883 4.56 11,905 5.07 0.0033
2017-05-12 2017-03-31 13F TRIMAS COM 896215209 546,057 5,456 1.01 11,331 -10.80 0.0033
2017-02-13 2016-12-31 13F TRIMAS COM 896215209 540,601 -131,994 -19.62 12,703 1.48 0.0039
2016-11-09 2016-09-30 13F TRIMAS COM 896215209 672,595 -81,283 -10.78 12,518 -7.75 0.0039
2016-08-12 2016-06-30 13F TRIMAS COM NEW 896215209 753,878 28,254 3.89 13,570 9.20 0.0044
2016-08-19 2016-03-31 13F/A-1 TRIMAS COM NEW 896215209 725,624 19,481 2.76 12,427 -5.63 0.0041
2016-05-13 2016-03-31 13F Trimas COMM 896215209 725,621 12,712
2016-02-12 2015-12-31 13F Trimas COMM 896215209 706,143 125,907 21.70 13,169 38.81 0.0044
2015-11-12 2015-09-30 13F Trimas COMM 896215209 580,236 580,236 0.00 9,487 0.0032
2015-08-13 2015-06-30 13F Trimas COMM 896215209 0 -553,850 -100.00 0 -100.00
2015-05-14 2015-03-31 13F Trimas COMM 896215209 553,850 15,103 2.80 17,053 1.16 0.0051
2015-02-12 2014-12-31 13F Trimas COM 896215209 538,747 -20,814 -3.72 16,857 23.81 0.0051
2014-11-13 2014-09-30 13F Trimas COMM 896215209 559,561 11,467 2.09 13,615 -34.85 0.0043
2014-08-14 2014-06-30 13F TRIMAS com 896215209 548,094 -45,634 -7.69 20,899 6.03 0.0065
2014-05-14 2014-03-31 13F TRIMAS COMM 896215209 593,728 -53,829 -8.31 19,711 -23.69 0.0062
2014-02-21 2013-12-31 13F/A-1 TRIMAS COM 896215209 647,557 14,839 2.35 25,831 9.42 0.0083
2014-02-12 2013-12-31 13F TRIMAS COM 896215209 647,557 25,831
2013-11-13 2013-09-30 13F TRIMAS COM 896215209 632,718 97,002 18.11 23,607 18.19 0.0083
2013-08-09 2013-06-30 13F TRIMAS COM 896215209 535,716 535,716 19,973 0.0072
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.