Dorman Products, Inc.
US ˙ NasdaqGS ˙ US2582781009

SecurityDORM / Dorman Products, Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership150,392 shares
Latest Disclosed Value $ 15,694,909
UBS Group AG reports 57.30% increase in ownership of DORM / Dorman Products, Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 150,392 shares of Dorman Products, Inc. (US:DORM) valued at $15,694,909 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 95,609 shares of Dorman Products, Inc.. This represents a change in shares of 57.30% during the quarter. The current value of the position is $18,761,402 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)
2026-05-05 2026-03-31 13F DORMAN PRODS COM 258278100 150,392 54,783 57.30 15,695 33.25 0.0004
2026-01-29 2025-12-31 13F DORMAN PRODS COM 258278100 95,609 45,314 90.10 11,778 50.25 0.0019
2025-11-13 2025-09-30 13F DORMAN PRODS COM 258278100 50,295 -85,944 -63.08 7,840 -53.09 0.0012
2025-08-14 2025-06-30 13F DORMAN PRODS COM 258278100 136,239 33,818 33.02 16,712 35.37 0.0029
2025-05-13 2025-03-31 13F DORMAN PRODS COM 258278100 102,421 25,361 32.91 12,346 23.66 0.0023
2025-02-14 2024-12-31 13F DORMAN PRODS COM 258278100 77,060 8,958 13.15 9,983 29.60 0.0018
2024-11-14 2024-09-30 13F DORMAN PRODS COM 258278100 68,102 -4,380 -6.04 7,704 16.18 0.0017
2024-08-14 2024-06-30 13F DORMAN PRODS COM 258278100 72,482 22,686 45.56 6,631 38.15 0.0016
2024-05-13 2024-03-31 13F DORMAN PRODS COM 258278100 49,796 18,964 61.51 4,800 86.66 0.0012
2024-02-09 2023-12-31 13F DORMAN PRODS COM 258278100 30,832 2,524 8.92 2,572 19.92 0.0008
2023-11-09 2023-09-30 13F DORMAN PRODS COM 258278100 28,308 -14,903 -34.49 2,145 -37.05 0.0007
2023-08-11 2023-06-30 13F DORMAN PRODS COM 258278100 43,211 14,011 47.98 3,406 35.27 0.0012
2023-05-12 2023-03-31 13F DORMAN PRODS COM 258278100 29,200 6,348 27.78 2,519 36.26 0.0009
2023-02-08 2022-12-31 13F DORMAN PRODS COM 258278100 22,852 7,866 52.49 1,848 50.12 0.0007
2022-11-10 2022-09-30 13F DORMAN PRODS COM 258278100 14,986 -348 -2.27 1,231 -26.81 0.0005
2022-08-10 2022-06-30 13F DORMAN PRODS COM 258278100 15,334 -158 -1.02 1,682 14.27 0.0007
2022-05-16 2022-03-31 13F DORMAN PRODS COM 258278100 15,492 -20,202 -56.60 1,472 -63.51 0.0005
2022-02-14 2021-12-31 13F DORMAN PRODS COM 258278100 35,694 22,143 163.40 4,034 214.42 0.0012
2021-11-15 2021-09-30 13F DORMAN PRODS COM 258278100 13,551 -7,459 -35.50 1,283 -41.09 0.0004
2021-08-13 2021-06-30 13F DORMAN PRODS COM 258278100 21,010 -15,434 -42.35 2,178 -41.78 0.0007
2021-05-12 2021-03-31 13F DORMAN PRODS COM 258278100 36,444 -1,604 -4.22 3,741 13.26 0.0012
2021-02-11 2020-12-31 13F DORMAN PRODS COM 258278100 38,048 -5,758 -13.14 3,303 -16.57 0.0011
2020-11-12 2020-09-30 13F DORMAN PRODUCTS COM 258278100 43,806 9,015 25.91 3,959 69.70 0.0015
2020-07-31 2020-06-30 13F DORMAN PRODUCTS COM 258278100 34,791 -3,882 -10.04 2,333 9.12 0.0010
2020-05-01 2020-03-31 13F DORMAN PRODUCTS COM 258278100 38,673 -21,382 -35.60 2,138 -52.99 0.0010
2020-02-14 2019-12-31 13F DORMAN PRODUCTS COM 258278100 60,055 15,290 34.16 4,548 27.75 0.0016
2019-11-14 2019-09-30 13F DORMAN PRODUCTS COM 258278100 44,765 1,582 3.66 3,560 -5.42 0.0014
2019-08-14 2019-06-30 13F DORMAN PRODUCTS COM 258278100 43,183 -1,611 -3.60 3,764 -4.59 0.0014
2019-05-14 2019-03-31 13F DORMAN PRODUCTS COM 258278100 44,794 -3,104 -6.48 3,945 -8.51 0.0016
2019-02-14 2018-12-31 13F DORMAN PRODUCTS COM 258278100 47,898 6,431 15.51 4,312 35.21 0.0020
2018-11-14 2018-09-30 13F DORMAN PRODUCTS COM 258278100 41,467 13,164 46.51 3,189 64.98 0.0013
2018-08-14 2018-06-30 13F DORMAN PRODUCTS COM 258278100 28,303 1,289 4.77 1,933 8.05 0.0008
2018-05-15 2018-03-31 13F DORMAN PRODUCTS COM 258278100 27,014 -12,827 -32.20 1,789 -26.56 0.0008
2018-02-14 2017-12-31 13F DORMAN PRODUCTS COM 258278100 39,841 -12,042 -23.21 2,436 -34.43 0.0010
2017-11-14 2017-09-30 13F DORMAN PRODUCTS COM 258278100 51,883 -24,386 -31.97 3,715 -41.14 0.0017
2017-11-14 2017-06-30 13F/A-1 DORMAN PRODUCTS COM 258278100 76,269 23,637 44.91 6,312 46.01 0.0033
2017-08-14 2017-06-30 13F DORMAN PRODUCTS COM 258278100 76,269 23,637 6,312
2017-11-14 2017-03-31 13F/A-1 DORMAN PRODUCTS COM 258278100 52,632 -4,786 -8.34 4,323 3.08 0.0024
2017-05-12 2017-03-31 13F DORMAN PRODUCTS COM 258278100 52,632 -4,786 4,323
2017-02-14 2016-12-31 13F DORMAN PRODUCTS COM 258278100 57,418 3,546 6.58 4,194 21.85 0.0023
2016-11-14 2016-09-30 13F DORMAN PRODUCTS COM 258278100 53,872 2,069 3.99 3,442 16.17 0.0021
2016-08-12 2016-06-30 13F DORMAN PRODUCTS COM 258278100 51,803 -1,084 -2.05 2,963 2.95 0.0019
2016-05-12 2016-03-31 13F DORMAN PRODUCTS COM 258278100 52,887 6,283 13.48 2,878 30.11 0.0019
2016-02-16 2015-12-31 13F DORMAN PRODUCTS COM 258278100 46,604 2,518 5.71 2,212 -1.43 0.0014
2015-11-13 2015-09-30 13F DORMAN PRODUCTS COM 258278100 44,086 -1,644 -3.60 2,244 2.98 0.0016
2015-08-14 2015-06-30 13F DORMAN PRODUCTS COM 258278100 45,730 6,630 16.96 2,179 12.03 0.0014
2015-05-14 2015-03-31 13F DORMAN PRODUCTS COM 258278100 39,100 3,368 9.43 1,945 12.75 0.0013
2015-02-17 2014-12-31 13F DORMAN PRODUCTS COM 258278100 35,732 35,732 1,725 0.0012
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.