Dorman Products, Inc.
US ˙ NasdaqGS ˙ US2582781009

SecurityDORM / Dorman Products, Inc.
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership4,528 shares
Latest Disclosed Value $ 472,542
Neuberger Berman Group LLC reports 16.29% decrease in ownership of DORM / Dorman Products, Inc.

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 4,528 shares of Dorman Products, Inc. (US:DORM) valued at $472,542 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 5,409 shares of Dorman Products, Inc.. This represents a change in shares of -16.29% during the quarter. The current value of the position is $575,192 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 PRODUCTS Common 258278100 4,528 -881 -16.29 473 -29.13 0.0002
2026-02-13 2025-12-31 13F DORMAN PRODUCTS Common 258278100 5,409 339 6.69 666 -15.70 0.0005
2025-11-12 2025-09-30 13F DORMAN PRODUCTS Common 258278100 5,070 -73,117 -93.52 790 -91.76 0.0006
2025-08-25 2025-06-30 13F/A-1 DORMAN PRODUCTS Common 258278100 78,187 2,756 3.65 9,591 5.49 0.0074
2025-08-13 2025-06-30 13F DORMAN PRODUCTS Common 258278100 78,187 2,756 9,591 0.0038
2025-05-13 2025-03-31 13F DORMAN PRODUCTS Common 258278100 75,431 6,757 9.84 9,092 2.20 0.0076
2025-02-13 2024-12-31 13F DORMAN PRODUCTS Common 258278100 68,674 -32,035 -31.81 8,897 -21.91 0.0071
2024-11-14 2024-09-30 13F DORMAN PRODUCTS Common 258278100 100,709 20,918 26.22 11,392 56.08 0.0089
2024-11-14 2024-06-30 13F/A-1 DORMAN PRODUCTS Common 258278100 79,791 76,847 2,610.29 7,299 2,479.15 0.0060
2024-08-13 2024-06-30 13F DORMAN PRODUCTS Common 258278100 79,791 76,847 7,299 0.0060
2024-11-14 2024-03-31 13F/A-1 DORMAN PRODUCTS Common 258278100 2,944 -152 -4.91 284 9.69 0.0002
2024-05-13 2024-03-31 13F DORMAN PRODUCTS Common 258278100 2,944 -152 284 0.0002
2024-11-14 2023-12-31 13F/A-2 DORMAN PRODUCTS Common 258278100 3,096 -316 -9.26 258 0.00 0.0002
2024-02-09 2023-12-31 13F DORMAN PRODUCTS Common 258278100 3,096 -316 258 0.0002
2023-11-14 2023-09-30 13F DORMAN PRODUCTS Common 258278100 3,412 74 2.22 258 -1.90 0.0002
2023-08-11 2023-06-30 13F DORMAN PRODUCTS Common 258278100 3,338 -10,566 -75.99 263 -78.07 0.0002
2023-05-12 2023-03-31 13F DORMAN PRODUCTS Common 258278100 13,904 -19,467 -58.34 1,199 -55.56 0.0011
2023-02-13 2022-12-31 13F DORMAN PRODUCTS Common 258278100 33,371 -10,877 -24.58 2,699 -25.76 0.0026
2022-11-15 2022-09-30 13F DORMAN PRODUCTS Common 258278100 44,248 -769 -1.71 3,634 -26.42 0.0038
2022-08-15 2022-06-30 13F DORMAN PRODUCTS Common 258278100 45,017 2,562 6.03 4,939 22.40 0.0050
2022-05-23 2022-03-31 13F/A-1 DORMAN PRODUCTS Common 258278100 42,455 2,233 5.55 4,035 -10.11 0.0034
2022-05-13 2022-03-31 13F DORMAN PRODUCTS Common 258278100 42,455 2,233 3,973 0.0018
2022-02-11 2021-12-31 13F DORMAN PRODUCTS Common 258278100 40,222 433 1.09 4,489 19.36 0.0035
2021-11-12 2021-09-30 13F DORMAN PRODUCTS Common 258278100 39,789 320 0.81 3,761 -8.00 0.0033
2021-08-13 2021-06-30 13F DORMAN PRODUCTS Common 258278100 39,469 627 1.61 4,088 2.53 0.0036
2021-05-13 2021-03-31 13F DORMAN PRODUCTS Common 258278100 38,842 581 1.52 3,987 20.02 0.0038
2021-02-10 2020-12-31 13F DORMAN PRODUCTS Common 258278100 38,261 0 0.00 3,322 -3.93 0.0034
2020-11-12 2020-09-30 13F DORMAN PRODUCTS Common 258278100 38,261 4,212 12.37 3,458 51.40 0.0041
2020-08-13 2020-06-30 13F DORMAN PRODUCTS Common 258278100 34,049 11,011 47.79 2,284 79.28 0.0028
2020-05-14 2020-03-31 13F DORMAN PRODUCTS Common 258278100 23,038 20,017 662.60 1,274 458.77 0.0019
2020-02-12 2019-12-31 13F DORMAN PRODUCTS Common 258278100 3,021 37 1.24 228 -3.80 0.0003
2019-11-13 2019-09-30 13F DORMAN PRODUCTS Common 258278100 2,984 -21,663 -87.89 237 -88.97 0.0003
2019-08-13 2019-06-30 13F DORMAN PRODUCTS Common 258278100 24,647 8,585 53.45 2,148 51.80 0.0026
2019-05-13 2019-03-31 13F DORMAN PRODUCTS Common 258278100 16,062 1,987 14.12 1,415 11.68 0.0017
2019-02-12 2018-12-31 13F DORMAN PRODUCTS Common 258278100 14,075 -4,457 -24.05 1,267 -11.09 0.0018
2018-11-16 2018-09-30 13F/A-1 DORMAN PRODUCTS Common 258278100 18,532 1,050 6.01 1,425 19.25 0.0016
2018-11-13 2018-09-30 13F DORMAN PRODUCTS Common 258278100 18,532 1,050 1,425
2018-08-13 2018-06-30 13F DORMAN PRODUCTS Common 258278100 17,482 11,809 208.16 1,195 217.82 0.0013
2018-05-08 2018-03-31 13F DORMAN PRODUCTS Common 258278100 5,673 -507 -8.20 376 -0.53 0.0004
2018-02-14 2017-12-31 13F DORMAN PRODUCTS Common 258278100 6,180 -453 -6.83 378 -20.42 0.0004
2017-11-15 2017-09-30 13F DORMAN PRODUCTS COMMON STOCK 258278100 6,633 -10,832 -62.02 475 -67.15 0.0006
2017-08-08 2017-06-30 13F DORMAN PRODUCTS COMMON STOCK 258278100 17,465 352 2.06 1,446 2.92 0.0019
2017-05-10 2017-03-31 13F DORMAN PRODUCTS COMMON STOCK 258278100 17,113 137 0.81 1,405 13.31 0.0018
2017-02-06 2016-12-31 13F DORMAN PRODUCTS COMMON STOCK 258278100 16,976 -3,573 -17.39 1,240 -5.56 0.0017
2016-11-02 2016-09-30 13F DORMAN PRODUCTS COMMON STOCK 258278100 20,549 3,919 23.57 1,313 38.07 0.0018
2016-08-05 2016-06-30 13F DORMAN PRODUCTS COMMON STOCK 258278100 16,630 11,400 217.97 951 233.68 0.0013
2016-05-06 2016-03-31 13F DORMAN PRODUCTS COMMON STOCK 258278100 5,230 959 22.45 285 40.39 0.0004
2016-01-28 2015-12-31 13F DORMAN PRODUCTS COMMON STOCK 258278100 4,271 4,271 0.00 203 0.0003
2014-11-04 2014-09-30 13F DORMAN PRODUCTS COMMON STOCK 258278100 0 -14,847 -100.00 0 -100.00
2014-08-05 2014-06-30 13F DORMAN PRODUCTS COMMON STOCK 258278100 14,847 -15,268 -50.70 732 -58.85 0.0007
2014-05-05 2014-03-31 13F DORMAN PRODUCTS COMMON STOCK 258278100 30,115 30,115 1,779 0.0018
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.