Dorman Products, Inc.
US ˙ NasdaqGS ˙ US2582781009

SecurityDORM / Dorman Products, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership424,966 shares
Latest Disclosed Value $ 44,349,452
Northern Trust Corp reports 0.11% increase in ownership of DORM / Dorman Products, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 424,966 shares of Dorman Products, Inc. (US:DORM) valued at $44,349,452 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 424,497 shares of Dorman Products, Inc.. This represents a change in shares of 0.11% during the quarter. The current value of the position is $54,412,647 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 DORMAN PRODS COM 258278100 424,966 469 0.11 44,349 -15.19 0.0012
2026-02-17 2025-12-31 13F DORMAN PRODS COM 258278100 424,497 -12,114 -2.77 52,294 -23.16 0.0014
2025-11-14 2025-09-30 13F DORMAN PRODS COM 258278100 436,611 -15,536 -3.44 68,059 22.71 0.0087
2025-08-13 2025-06-30 13F DORMAN PRODS COM 258278100 452,147 -6,505 -1.42 55,465 0.32 0.0076
2025-05-13 2025-03-31 13F DORMAN PRODS COM 258278100 458,652 -14,069 -2.98 55,286 -9.73 0.0082
2025-02-14 2024-12-31 13F DORMAN PRODS COM 258278100 472,721 43,811 10.21 61,241 26.22 0.0087
2024-11-13 2024-09-30 13F DORMAN PRODS COM 258278100 428,910 -7,503 -1.72 48,518 21.53 0.0079
2024-08-14 2024-06-30 13F DORMAN PRODS COM 258278100 436,413 -7,623 -1.72 39,923 -6.72 0.0067
2024-05-14 2024-03-31 13F DORMAN PRODS COM 258278100 444,036 -4,233 -0.94 42,801 14.47 0.0074
2024-02-13 2023-12-31 13F DORMAN PRODS COM 258278100 448,269 -17,058 -3.67 37,390 6.06 0.0068
2023-11-13 2023-09-30 13F DORMAN PRODS COM 258278100 465,327 -14,433 -3.01 35,253 -6.78 0.0068
2023-08-11 2023-06-30 13F DORMAN PRODS COM 258278100 479,760 10,277 2.19 37,819 -6.61 0.0073
2023-05-15 2023-03-31 13F DORMAN PRODS COM 258278100 469,483 16,926 3.74 40,498 10.65 0.0080
2023-02-13 2022-12-31 13F DORMAN PRODS COM 258278100 452,557 -5,715 -1.25 36,598 -2.75 0.0077
2022-11-14 2022-09-30 13F DORMAN PRODS COM 258278100 458,272 7,869 1.75 37,634 -23.84 0.0086
2022-08-12 2022-06-30 13F DORMAN PRODS COM 258278100 450,403 -19,396 -4.13 49,414 10.68 0.0106
2022-05-13 2022-03-31 13F DORMAN PRODS COM 258278100 469,799 8,881 1.93 44,644 -14.29 0.0079
2022-02-08 2021-12-31 13F DORMAN PRODS COM 258278100 460,918 -9,178 -1.95 52,088 17.04 0.0085
2021-11-15 2021-09-30 13F DORMAN PRODS COM 258278100 470,096 -9,813 -2.04 44,504 -10.55 0.0079
2021-08-13 2021-06-30 13F DORMAN PRODS COM 258278100 479,909 -7,770 -1.59 49,752 -0.61 0.0088
2021-05-12 2021-03-31 13F DORMAN PRODS COM 258278100 487,679 -25,968 -5.06 50,055 12.24 0.0093
2021-02-11 2020-12-31 13F DORMAN PRODS COM 258278100 513,647 -19,170 -3.60 44,596 -7.39 0.0087
2020-11-16 2020-09-30 13F DORMAN PRODUCTS COM 258278100 532,817 -27,756 -4.95 48,156 28.08 0.0106
2020-08-14 2020-06-30 13F DORMAN PRODUCTS COM 258278100 560,573 4,942 0.89 37,598 22.43 0.0089
2020-05-14 2020-03-31 13F DORMAN PRODUCTS COM 258278100 555,631 14,240 2.63 30,709 -25.09 0.0088
2020-02-14 2019-12-31 13F DORMAN PRODUCTS COM 258278100 541,391 -12,026 -2.17 40,994 -6.87 0.0092
2019-11-13 2019-09-30 13F DORMAN PRODUCTS COM 258278100 553,417 12,948 2.40 44,019 -6.53 0.0105
2019-08-13 2019-06-30 13F DORMAN PRODUCTS COM 258278100 540,469 5,402 1.01 47,096 -0.08 0.0112
2019-05-13 2019-03-31 13F DORMAN PRODUCTS COM 258278100 535,067 34,645 6.92 47,134 4.63 0.0116
2019-02-12 2018-12-31 13F DORMAN PRODUCTS COM 258278100 500,422 5,550 1.12 45,048 18.34 0.0126
2018-11-14 2018-09-30 13F DORMAN PRODUCTS COM 258278100 494,872 -7,919 -1.58 38,065 10.83 0.0093
2018-09-18 2018-06-30 13F/A-1 DORMAN PRODUCTS COM 258278100 502,791 13,478 2.75 34,345 6.01 0.0087
2018-08-14 2018-06-30 13F DORMAN PRODUCTS COM 258278100 505,079 15,766 34,501
2018-05-09 2018-03-31 13F DORMAN PRODUCTS COM 258278100 489,313 -1,285 -0.26 32,397 8.00 0.0084
2018-02-14 2017-12-31 13F DORMAN PRODUCTS COM 258278100 490,598 5,919 1.22 29,996 -13.59 0.0076
2017-11-13 2017-09-30 13F DORMAN PRODUCTS COM 258278100 484,679 -10,388 -2.10 34,713 -15.29 0.0090
2017-08-11 2017-06-30 13F DORMAN PRODUCTS COM 258278100 495,067 1,945 0.39 40,977 1.18 0.0115
2017-05-12 2017-03-31 13F DORMAN PRODUCTS COM 258278100 493,122 -2,086 -0.42 40,501 11.95 0.0117
2017-02-13 2016-12-31 13F DORMAN PRODUCTS COM 258278100 495,208 -171,659 -25.74 36,179 -15.10 0.0111
2016-11-09 2016-09-30 13F DORMAN PRODUCTS COM 258278100 666,867 7,139 1.08 42,613 12.92 0.0133
2016-08-12 2016-06-30 13F DORMAN PRODUCTS COM 258278100 659,728 6,857 1.05 37,737 7.83 0.0123
2016-08-19 2016-03-31 13F/A-1 DORMAN PRODUCTS COM 258278100 652,871 5,353 0.83 34,997 13.86 0.0116
2016-05-13 2016-03-31 13F Dorman Products COMM 258278100 652,870 35,529
2016-02-12 2015-12-31 13F Dorman Products COMM 258278100 647,518 2,799 0.43 30,738 -6.32 0.0102
2015-11-12 2015-09-30 13F Dorman Products COMM 258278100 644,719 164,950 34.38 32,811 43.50 0.0109
2015-08-13 2015-06-30 13F DORMAN PRODUCTS COM 258278100 479,769 -104,907 -17.94 22,865 -21.40 0.0155
2015-08-13 2015-06-30 13F Dorman Products COMM 025827810 118,724 -465,952 5,658 0.0038
2015-05-14 2015-03-31 13F Dorman Products COMM 258278100 584,676 3,493 0.60 29,089 3.69 0.0087
2015-02-12 2014-12-31 13F Dorman Products COM 258278100 581,183 -8,220 -1.39 28,053 18.81 0.0085
2014-11-13 2014-09-30 13F Dorman Products COMM 258278100 589,403 100,136 20.47 23,612 -2.15 0.0074
2014-08-14 2014-06-30 13F DORMAN PRODUCTS com 258278100 489,267 -87,996 -15.24 24,131 -29.22 0.0075
2014-05-14 2014-03-31 13F DORMAN PRODUCTS COMM 258278100 577,263 77,719 15.56 34,093 21.78 0.0107
2014-02-21 2013-12-31 13F/A-1 DORMAN PRODUCTS COM 258278100 499,544 6,109 1.24 27,995 14.50 0.0090
2014-02-12 2013-12-31 13F DORMAN PRODUCTS COM 258278100 499,544 27,995
2013-11-13 2013-09-30 13F DORMAN PRODUCTS COM 258278100 493,435 -2,555 -0.52 24,450 8.04 0.0086
2013-08-09 2013-06-30 13F DORMAN PRODUCTS COM 258278100 495,990 495,990 22,631 0.0082
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.