Dorman Products, Inc.
US ˙ NasdaqGS ˙ US2582781009

SecurityDORM / Dorman Products, Inc.
InstitutionCAPROCK Group, Inc.
Latest Disclosed Ownership2,942 shares
Latest Disclosed Value $ 307,027
CAPROCK Group, Inc. reports 30.97% decrease in ownership of DORM / Dorman Products, Inc.

On May 11, 2026 - CAPROCK Group, Inc. filed a 13F-HR form disclosing ownership of 2,942 shares of Dorman Products, Inc. (US:DORM) valued at $307,027 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 4,262 shares of Dorman Products, Inc.. This represents a change in shares of -30.97% during the quarter. The current value of the position is $367,014 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)
2026-05-11 2026-03-31 13F DORMAN PRODS COM 258278100 2,942 -1,320 -30.97 307 -41.52 0.0075
2026-01-28 2025-12-31 13F DORMAN PRODS COM 258278100 4,262 -691 -13.95 525 -34.46 0.0111
2025-11-06 2025-09-30 13F DORMAN PRODS COM 258278100 4,953 1,329 36.67 801 83.72 0.0197
2025-05-15 2025-03-31 13F DORMAN PRODS COM 258278100 3,624 897 32.89 437 23.51 0.0133
2025-01-23 2024-12-31 13F DORMAN PRODS COM 258278100 2,727 -9 -0.33 353 14.24 0.0115
2024-11-07 2024-09-30 13F DORMAN PRODS COM 258278100 2,736 -6 -0.22 309 23.60 0.0113
2024-08-06 2024-06-30 13F DORMAN PRODS COM 258278100 2,742 -1 -0.04 251 -5.30 0.0102
2024-04-29 2024-03-31 13F DORMAN PRODS COM 258278100 2,743 -1 -0.04 264 15.79 0.0152
2024-01-18 2023-12-31 13F DORMAN PRODS COM 258278100 2,744 6 0.22 229 10.14 0.0146
2023-10-18 2023-09-30 13F DORMAN PRODS COM 258278100 2,738 0 0.00 207 -3.72 0.0157
2023-08-10 2023-06-30 13F DORMAN PRODS COM 258278100 2,738 24 0.88 216 -8.12 0.0158
2023-04-26 2023-03-31 13F DORMAN PRODS COM 258278100 2,714 2,714 234 0.0181
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.