Dorman Products, Inc.
US ˙ NasdaqGS ˙ US2582781009

SecurityDORM / Dorman Products, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership1,099,272 shares
Latest Disclosed Value $ 114,720,026
State Street Corp reports 3.54% increase in ownership of DORM / Dorman Products, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 1,099,272 shares of Dorman Products, Inc. (US:DORM) valued at $114,720,026 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,061,708 shares of Dorman Products, Inc.. This represents a change in shares of 3.54% during the quarter. The current value of the position is $137,134,182 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)
2026-05-15 2026-03-31 13F DORMAN PRODS COM 258278100 1,099,272 37,564 3.54 114,720 -12.29 0.0040
2026-02-13 2025-12-31 13F DORMAN PRODS COM 258278100 1,061,708 7,846 0.74 130,792 -20.38 0.0044
2025-11-14 2025-09-30 13F DORMAN PRODS COM 258278100 1,053,862 -27,110 -2.51 164,276 23.89 0.0057
2025-08-14 2025-06-30 13F DORMAN PRODS COM 258278100 1,080,972 1,825 0.17 132,603 1.94 0.0050
2025-05-15 2025-03-31 13F DORMAN PRODS COM 258278100 1,079,147 -43,825 -3.90 130,080 -10.59 0.0054
2025-02-14 2024-12-31 13F DORMAN PRODS COM 258278100 1,122,972 14,645 1.32 145,481 16.04 0.0057
2024-11-14 2024-09-30 13F DORMAN PRODS COM 258278100 1,108,327 87,780 8.60 125,374 34.29 0.0051
2024-08-14 2024-06-30 13F DORMAN PRODS COM 258278100 1,020,547 -23,369 -2.24 93,360 -7.22 0.0041
2024-05-15 2024-03-31 13F DORMAN PRODS COM 258278100 1,043,916 12,228 1.19 100,623 16.93 0.0045
2024-02-14 2023-12-31 13F DORMAN PRODS COM 258278100 1,031,688 58,658 6.03 86,053 16.74 0.0042
2023-11-14 2023-09-30 13F DORMAN PRODS COM 258278100 973,030 8,291 0.86 73,717 -3.07 0.0041
2023-08-14 2023-06-30 13F DORMAN PRODS COM 258278100 964,739 11,027 1.16 76,050 -7.56 0.0040
2023-05-15 2023-03-31 13F DORMAN PRODS COM 258278100 953,712 41,648 4.57 82,267 11.54 0.0046
2023-05-15 2022-12-31 13F/A-99 DORMAN PRODS COM 258278100 912,064 -32,796 -3.47 73,759 -4.94 0.0043
2023-05-15 2022-12-31 13F DORMAN PRODS COM 258278100 912,064 -32,796 73,759 0.0043
2022-11-15 2022-09-30 13F DORMAN PRODS COM 258278100 944,860 8,840 0.94 77,592 -24.44 0.0049
2022-08-15 2022-06-30 13F DORMAN PRODS COM 258278100 936,020 -315 -0.03 102,691 15.41 0.0062
2022-05-16 2022-03-31 13F DORMAN PRODS COM 258278100 936,335 31,245 3.45 88,980 -13.01 0.0044
2022-02-14 2021-12-31 13F DORMAN PRODS COM 258278100 905,090 32,243 3.69 102,284 23.78 0.0049
2021-11-15 2021-09-30 13F DORMAN PRODS COM 258278100 872,847 -3,057 -0.35 82,632 -9.00 0.0044
2021-08-16 2021-06-30 13F DORMAN PRODS COM 258278100 875,904 27,193 3.20 90,805 4.24 0.0048
2021-07-09 2021-03-31 13F/A-1 DORMAN PRODS COM 258278100 848,711 11,519 1.38 87,112 19.85 0.0050
2021-05-17 2021-03-31 13F DORMAN PRODS COM 258278100 848,711 11,519 87,112 0.0050
2021-02-16 2020-12-31 13F DORMAN PRODS COM 258278100 837,192 -31,771 -3.66 72,685 -7.45 0.0045
2020-11-10 2020-09-30 13F DORMAN PRODUCTS COM 258278100 868,963 -28,155 -3.14 78,537 30.53 0.0054
2020-08-14 2020-06-30 13F DORMAN PRODUCTS COM 258278100 897,118 11,204 1.26 60,170 22.89 0.0044
2020-06-19 2020-03-31 13F/A-1 DORMAN PRODUCTS COM 258278100 885,914 53,944 6.48 48,964 -22.28 0.0043
2020-05-11 2020-03-31 13F DORMAN PRODUCTS COM 258278100 885,914 53,944 48,964 4,300.0251
2020-02-06 2019-12-31 13F DORMAN PRODUCTS COM 258278100 831,970 21,679 2.68 62,997 -2.26 0.0043
2019-11-14 2019-09-30 13F DORMAN PRODUCTS COM 258278100 810,291 -6,081 -0.74 64,451 -9.40 0.0048
2019-08-14 2019-06-30 13F DORMAN PRODUCTS COM 258278100 816,372 26,543 3.36 71,139 2.25 0.0053
2019-05-15 2019-03-31 13F DORMAN PRODUCTS COM 258278100 789,829 25,564 3.34 69,576 1.13 0.0054
2019-02-12 2018-12-31 13F DORMAN PRODUCTS COM 258278100 764,265 -7,852 -1.02 68,799 15.83 0.0063
2018-11-09 2018-09-30 13F DORMAN PRODUCTS Common equity shares 258278100 772,117 45,178 6.21 59,394 19.62 0.0046
2018-08-14 2018-06-30 13F DORMAN PRODUCTS Common equity shares 258278100 726,939 15,261 2.14 49,653 5.38 0.0042
2018-05-15 2018-03-31 13F DORMAN PRODUCTS Common equity shares 258278100 711,678 13,150 1.88 47,119 10.34 0.0040
2018-02-14 2017-12-31 13F DORMAN PRODUCTS Common equity shares 258278100 698,528 24,479 3.63 42,705 -11.54 0.0034
2017-11-14 2017-09-30 13F DORMAN PRODUCTS Common equity shares 258278100 674,049 -10,505 -1.53 48,278 -14.80 0.0042
2017-08-14 2017-06-30 13F DORMAN PRODUCTS Common equity shares 258278100 684,554 34,516 5.31 56,661 6.13 0.0050
2017-05-15 2017-03-31 13F DORMAN PRODUCTS Common equity shares 258278100 650,038 51,982 8.69 53,388 22.18 0.0048
2017-02-09 2016-12-31 13F DORMAN PRODUCTS Common equity shares 258278100 598,056 43,770 7.90 43,696 23.37 0.0041
2017-01-13 2016-09-30 13F/A-1 DORMAN PRODUCTS Common equity shares 258278100 554,286 26,287 4.98 35,420 17.27 0.0036
2016-11-14 2016-09-30 13F DORMAN PRODUCTS Common equity shares 258278100 554,286 35,420
2016-08-12 2016-06-30 13F DORMAN PRODUCTS Common equity shares 258278100 527,999 2,014 0.38 30,203 5.51 0.0032
2016-05-20 2016-03-31 13F/A-1 DORMAN PRODUCTS Common equity shares 258278100 525,985 10,422 2.02 28,625 16.99 0.0031
2016-05-12 2016-03-31 13F DORMAN PRODUCTS Common equity shares 258278100 525,985 28,625
2016-02-16 2015-12-31 13F DORMAN PRODUCTS Common equity shares 258278100 515,563 10,169 2.01 24,468 -4.86 0.0027
2015-11-16 2015-09-30 13F DORMAN PRODUCTS Common equity shares 258278100 505,394 412 0.08 25,717 6.85 0.0030
2015-08-13 2015-06-30 13F DORMAN PRODUCTS Common equity shares 258278100 504,982 -4,889 -0.96 24,069 -5.12 0.0026
2015-05-15 2015-03-31 13F DORMAN PRODUCTS Common equity shares 258278100 509,871 17,435 3.54 25,369 6.74 0.0026
2015-02-11 2014-12-31 13F DORMAN PRODUCTS Common equity shares 258278100 492,436 -554 -0.11 23,767 20.35 0.0024
2014-11-12 2014-09-30 13F/A-1 DORMAN PRODUCTS Common equity shares 258278100 492,990 -5,690 -1.14 19,748 -19.70 0.0021
2014-11-10 2014-09-30 13F DORMAN PRODUCTS Common equity shares 258278100 492,990 19,748
2014-08-12 2014-06-30 13F DORMAN PRODUCTS Common equity shares 258278100 498,680 -2,939 -0.59 24,594 -16.98 0.0027
2014-05-15 2014-03-31 13F/A-1 DORMAN PRODUCTS Common equity shares 258278100 501,619 5,893 1.19 29,623 6.60 0.0034
2014-05-13 2014-03-31 13F DORMAN PRODUCTS Common equity shares 258278100 501,619 29,623
2014-02-06 2013-12-31 13F/A-1 DORMAN PRODUCTS Common equity shares 258278100 495,726 -1,771 -0.36 27,788 12.71 0.0031
2014-02-06 2013-12-31 13F DORMAN PRODUCTS Common equity shares 258278100 431,452 15,247
2013-11-12 2013-09-30 13F DORMAN PRODUCTS Common equity shares 258278100 497,497 25,696 5.45 24,655 14.51 0.0030
2013-08-08 2013-06-30 13F DORMAN PRODUCTS Common equity shares 258278100 471,801 471,801 21,530 0.0028
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.