Dorman Products, Inc.
US ˙ NasdaqGS ˙ US2582781009

SecurityDORM / Dorman Products, Inc.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership27,648 shares
Latest Disclosed Value $ 2,885
Natixis Advisors, L.p. reports 10.41% decrease in ownership of DORM / Dorman Products, Inc.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 27,648 shares of Dorman Products, Inc. (US:DORM) valued at $2,885,345 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 30,859 shares of Dorman Products, Inc.. This represents a change in shares of -10.41% during the quarter. The current value of the position is $3,449,088 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)
2026-05-13 2026-03-31 13F DORMAN PRODS COM 258278100 27,648 -3,211 -10.41 3 -33.33 0.0040
2026-02-10 2025-12-31 13F DORMAN PRODS COM 258278100 30,859 -1,826 -5.59 4 -40.00 0.0054
2025-11-13 2025-09-30 13F DORMAN PRODS INC COM 258278100 32,685 1,598 5.14 5 66.67 0.0074
2025-08-13 2025-06-30 13F DORMAN PRODS COM 258278100 31,087 1,154 3.86 4 0.00 0.0060
2025-05-08 2025-03-31 13F DORMAN PRODS COM 258278100 29,933 1,363 4.77 4 0.00 0.0067
2025-02-10 2024-12-31 13F DORMAN PRODS INC COM COM 258278100 28,570 1,088 3.96 4 0.00 0.0069
2024-11-06 2024-09-30 13F DORMAN PRODS COM 258278100 27,482 3,049 12.48 3 50.00 0.0061
2024-08-01 2024-06-30 13F DORMAN PRODS COM 258278100 24,433 416 1.73 2 0.00 0.0049
2024-04-25 2024-03-31 13F DORMAN PRODS COM 258278100 24,017 4,037 20.21 2 100.00 0.0053
2024-02-06 2023-12-31 13F DORMAN PRODS COM 258278100 19,980 -7,672 -27.74 2 -50.00 0.0044
2023-11-13 2023-09-30 13F DORMAN PRODS COM 258278100 27,652 -1,011 -3.53 2 0.00 0.0064
2023-08-15 2023-06-30 13F DORMAN PRODS COM 258278100 28,663 -736 -2.50 2 0.00 0.0070
2023-05-11 2023-03-31 13F DORMAN PRODS COM 258278100 29,399 2,568 9.57 3 0.00 0.0087
2023-01-27 2022-12-31 13F DORMAN PRODS COM 258278100 26,831 1,954 7.85 2 -99.90 0.0082
2022-11-14 2022-09-30 13F DORMAN PRODS COM 258278100 24,877 -7,653 -23.53 2,043 -42.76 0.0086
2022-08-12 2022-06-30 13F DORMAN PRODS COM 258278100 32,530 4,250 15.03 3,569 32.82 0.0157
2022-05-12 2022-03-31 13F DORMAN PRODS COM 258278100 28,280 1,911 7.25 2,687 -9.83 0.0102
2022-02-08 2021-12-31 13F DORMAN PRODS COM 258278100 26,369 1,681 6.81 2,980 27.51 0.0114
2021-11-15 2021-09-30 13F DORMAN PRODS COM 258278100 24,688 -410 -1.63 2,337 -10.18 0.0096
2021-08-12 2021-06-30 13F DORMAN PRODS COM 258278100 25,098 -623 -2.42 2,602 -1.44 0.0121
2021-05-05 2021-03-31 13F DORMAN PRODS COM 258278100 25,721 321 1.26 2,640 19.73 0.0138
2021-02-12 2020-12-31 13F DORMAN PRODS COM 258278100 25,400 -548 -2.11 2,205 -5.97 0.0127
2020-11-12 2020-09-30 13F DORMAN PRODUCTS COM 258278100 25,948 269 1.05 2,345 36.18 0.0148
2020-08-11 2020-06-30 13F DORMAN PRODUCTS COM 258278100 25,679 5,064 24.56 1,722 51.19 0.0114
2020-04-27 2020-03-31 13F DORMAN PRODUCTS COM 258278100 20,615 458 2.27 1,139 -25.36 0.0093
2020-02-10 2019-12-31 13F DORMAN PRODUCTS COM 258278100 20,157 -1,197 -5.61 1,526 -10.13 0.0108
2019-11-12 2019-09-30 13F DORMAN PRODUCTS COM 258278100 21,354 2,102 10.92 1,698 1.19 0.0135
2019-08-12 2019-06-30 13F DORMAN PRODS COM 258278100 19,252 697 3.76 1,678 2.63 0.0137
2019-05-15 2019-03-31 13F/A-1 DORMAN PRODS COM 258278100 18,555 2,272 13.95 1,635 11.60 0.0143
2019-05-15 2019-03-31 13F DORMAN PRODS COM 258278100 18,555 2,272 1,635
2019-02-13 2018-12-31 13F/A-1 DORMAN PRODUCTS COM 258278100 16,283 921 6.00 1,465 24.05 0.0145
2019-02-13 2018-12-31 13F DORMAN PRODUCTS COM 258278100 16,283 921 1,465
2018-11-13 2018-09-30 13F DORMAN PRODUCTS COM 258278100 15,362 333 2.22 1,181 15.00 0.0104
2018-08-14 2018-06-30 13F/A-1 DORMAN PRODUCTS COM 258278100 15,029 3,065 25.62 1,027 29.67 0.0098
2018-08-14 2018-06-30 13F DORMAN PRODUCTS COM 258278100 15,029 1,027
2018-05-10 2018-03-31 13F DORMAN PRODUCTS COM 258278100 11,964 11,964 792 0.0078
2018-02-14 2017-12-31 13F DORMAN PRODUCTS COM 258278100 0 -21,976 -100.00 0 -100.00
2017-11-14 2017-09-30 13F DORMAN PRODUCTS COM 258278100 21,976 1,331 6.45 1,573 -7.96 0.0166
2017-07-27 2017-06-30 13F DORMAN PRODUCTS COM 258278100 20,645 52 0.25 1,709 1.06 0.0185
2017-05-12 2017-03-31 13F DORMAN PRODUCTS COM 258278100 20,593 -2,524 -10.92 1,691 0.12 0.0187
2017-02-07 2016-12-31 13F DORMAN PRODUCTS COM 258278100 23,117 1,275 5.84 1,689 20.99 0.0203
2016-11-04 2016-09-30 13F DORMAN PRODUCTS COM 258278100 21,842 -15 -0.07 1,396 11.68 0.0181
2016-08-01 2016-06-30 13F DORMAN PRODUCTS COM 258278100 21,857 -1,234 -5.34 1,250 -0.56 0.0173
2016-05-06 2016-03-31 13F DORMAN PRODUCTS COM 258278100 23,091 3,614 18.56 1,257 35.89 0.0188
2016-02-12 2015-12-31 13F DORMAN PRODUCTS IN COM 258278100 19,477 -2,512 -11.42 925 -17.34 0.0152
2015-11-12 2015-09-30 13F DORMAN PRODUCTS COM 258278100 21,989 1,231 5.93 1,119 13.14 0.0194
2015-08-14 2015-06-30 13F DORMAN PRODUCTS COM 258278100 20,758 20,758 989 0.0168
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.