Dorman Products, Inc.
US ˙ NasdaqGS ˙ US2582781009

SecurityDORM / Dorman Products, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,778,487 shares
Ownership 4.88%
Dimensional Fund Advisors Lp ownership in DORM / Dorman Products, Inc.

2014-02-10 - Dimensional Fund Advisors Lp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 1,778,487 shares of Dorman Products, Inc. (US:DORM). This represents 4.88 percent ownership of the company.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2014-02-10 2014-02-10 13G/A 1,778,487 4.88
2013-02-11 2013-02-11 13G/A 2,062,498 5.66
2012-02-14 2012-02-14 13G/A 1,054,869 5.84

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-05-07 2026-03-31 13F DORMAN PRODS COM 258278100 1,099,352 51,653 4.93 114,725 -11.12 0.0051
2026-02-12 2025-12-31 13F DORMAN PRODS COM 258278100 1,047,699 21,868 2.13 129,072 -19.28 0.0271
2025-11-12 2025-09-30 13F DORMAN PRODS COM 258278100 1,025,831 3,064 0.30 159,894 27.44 0.0343
2025-08-12 2025-06-30 13F DORMAN PRODS COM 258278100 1,022,767 70,217 7.37 125,469 9.28 0.0290
2025-05-13 2025-03-31 13F DORMAN PRODS COM 258278100 952,550 -51,830 -5.16 114,819 -11.76 0.0285
2025-02-13 2024-12-31 13F DORMAN PRODS COM 258278100 1,004,380 -1,847 -0.18 130,122 14.32 0.0313
2024-11-07 2024-09-30 13F DORMAN PRODS COM 258278100 1,006,227 -22,817 -2.22 113,825 20.92 0.0276
2024-08-09 2024-06-30 13F DORMAN PRODS COM 258278100 1,029,044 24,811 2.47 94,136 -2.75 0.0246
2024-05-10 2024-03-31 13F DORMAN PRODS COM 258278100 1,004,233 16,830 1.70 96,798 17.53 0.0262
2024-02-07 2023-12-31 13F DORMAN PRODS COM 258278100 987,403 26,724 2.78 82,361 13.16 0.0240
2023-11-09 2023-09-30 13F DORMAN PRODS COM 258278100 960,679 47,019 5.15 72,783 1.05 0.0239
2023-08-09 2023-06-30 13F DORMAN PRODS COM 258278100 913,660 64,668 7.62 72,024 -1.65 0.0230
2023-05-12 2023-03-31 13F DORMAN PRODS COM 258278100 848,992 25,519 3.10 73,231 110,856.06 0.0247
2023-02-09 2022-12-31 13F DORMAN PRODS COM 258278100 823,473 5,077 0.62 67 -99.90 0.0197
2022-11-10 2022-09-30 13F DORMAN PRODS COM 258278100 818,396 14,307 1.78 67,208 -23.81 0.0258
2022-08-12 2022-06-30 13F DORMAN PRODS COM 258278100 804,089 1,071 0.13 88,212 15.59 0.0316
2022-05-13 2022-03-31 13F DORMAN PRODS COM 258278100 803,018 -3,541 -0.44 76,313 -16.27 0.0235
2022-02-09 2021-12-31 13F DORMAN PRODS COM 258278100 806,559 -17,995 -2.18 91,147 16.76 0.0276
2021-11-12 2021-09-30 13F DORMAN PRODS COM 258278100 824,554 19,433 2.41 78,066 -6.47 0.0251
2021-08-12 2021-06-30 13F DORMAN PRODS COM 258278100 805,121 -32,218 -3.85 83,467 -3.06 0.0264
2021-05-14 2021-03-31 13F DORMAN PRODS COM 258278100 837,339 -21,233 -2.47 86,105 15.51 0.0285
2021-03-08 2020-12-31 13F/A-2 DORMAN PRODS COM 258278100 858,572 -23,511 -2.67 74,544 -6.49 0.0269
2021-02-11 2020-12-31 13F DORMAN PRODS COM 258278100 858,572 -23,511 74,544 26,921.3306
2020-11-12 2020-09-30 13F DORMAN PRODUCTS COM 258278100 882,083 -40,379 -4.38 79,719 28.85 0.0338
2020-08-13 2020-06-30 13F DORMAN PRODUCTS COM 258278100 922,462 -16,448 -1.75 61,869 19.23 0.0272
2020-05-14 2020-03-31 13F DORMAN PRODUCTS COM 258278100 938,910 3,937 0.42 51,892 -26.70 0.0270
2020-02-14 2019-12-31 13F DORMAN PRODUCTS COM 258278100 934,973 -3,829 -0.41 70,795 -5.19 0.0258
2019-11-12 2019-09-30 13F DORMAN PRODUCTS COM 258278100 938,802 -7,513 -0.79 74,672 -9.44 0.0290
2019-08-13 2019-06-30 13F DORMAN PRODUCTS COM 258278100 946,315 -882 -0.09 82,460 -1.17 0.0320
2019-08-12 2019-03-31 13F/A-2 DORMAN PRODUCTS COM 258278100 947,197 7,018 0.75 83,439 -1.41 0.0332
2019-05-10 2019-03-31 13F DORMAN PRODUCTS COM 258278100 947,197 7,018 83,439
2019-02-26 2018-12-31 13F/A-1 DORMAN PRODUCTS COM 258278100 940,179 11,446 1.23 84,633 18.47 0.0383
2019-02-13 2018-12-31 13F DORMAN PRODUCTS COM 258278100 940,179 11,446 84,633
2018-11-13 2018-09-30 13F DORMAN PRODUCTS COM 258278100 928,733 2,303 0.25 71,439 12.88 0.0272
2018-08-10 2018-06-30 13F DORMAN PRODUCTS COM 258278100 926,430 20,127 2.22 63,287 5.47 0.0252
2018-05-11 2018-03-31 13F DORMAN PRODUCTS COM 258278100 906,303 -5,419 -0.59 60,006 7.64 0.0250
2018-02-12 2017-12-31 13F DORMAN PRODUCTS COM 258278100 911,722 52,630 6.13 55,745 -9.40 0.0231
2017-11-13 2017-09-30 13F DORMAN PRODUCTS COM 258278100 859,092 10,520 1.24 61,528 -12.40 0.0269
2017-08-11 2017-06-30 13F DORMAN PRODUCTS COM 258278100 848,572 3,534 0.42 70,236 1.20 0.0324
2017-05-12 2017-03-31 13F DORMAN PRODUCTS COM 258278100 845,038 717 0.08 69,402 12.51 0.0332
2017-02-09 2016-12-31 13F DORMAN PRODUCTS COM 258278100 844,321 8,368 1.00 61,687 15.48 0.0308
2016-11-10 2016-09-30 13F DORMAN PRODUCTS COM 258278100 835,953 -9,267 -1.10 53,417 10.49 0.0289
2016-08-09 2016-06-30 13F DORMAN PRODUCTS COM 258278100 845,220 30,015 3.68 48,345 8.97 0.0278
2016-05-13 2016-03-31 13F DORMAN PRODUCTS COM 258278100 815,205 -31,893 -3.76 44,364 10.32 0.0266
2016-02-10 2015-12-31 13F DORMAN PRODUCTS COM 258278100 847,098 -10,067 -1.17 40,213 -7.81 0.0251
2015-11-13 2015-09-30 13F DORMAN PRODUCTS COM 258278100 857,165 -19,142 -2.18 43,621 4.44 0.0286
2015-08-14 2015-06-30 13F DORMAN PRODUCTS COM 258278100 876,307 -48,387 -5.23 41,765 -9.21 0.0256
2015-05-14 2015-03-31 13F DORMAN PRODUCTS COM 258278100 924,694 -170,400 -15.56 46,003 -12.97 0.0290
2015-02-06 2014-12-31 13F DORMAN PRODUCTS COM 258278100 1,095,094 -260,117 -19.19 52,861 -2.63 0.0347
2014-11-13 2014-09-30 13F DORMAN PRODUCTS COM 258278100 1,355,211 -127,903 -8.62 54,290 -25.78 0.0385
2014-08-08 2014-06-30 13F DORMAN PRODUCTS COM 258278100 1,483,114 -138,407 -8.54 73,147 -23.62 0.0508
2014-05-14 2014-03-31 13F DORMAN PRODUCTS COM 258278100 1,621,521 -156,966 -8.83 95,766 -3.96 0.0716
2014-02-12 2013-12-31 13F DORMAN PRODUCTS COM 258278100 1,778,487 -52,136 -2.85 99,719 9.94 0.0777
2013-11-13 2013-09-30 13F DORMAN PRODUCTS COM 258278100 1,830,623 -24,860 -1.34 90,707 7.14 0.0785
2013-08-15 2013-06-30 13F DORMAN PRODUCTS COM 258278100 1,855,483 1,855,483 84,666 0.0797
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.