Dorman Products, Inc.
US ˙ NasdaqGS ˙ US2582781009

SecurityDORM / Dorman Products, Inc.
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership41,989 shares
Latest Disclosed Value $ 4,381,972
Squarepoint Ops LLC ownership in DORM / Dorman Products, Inc.

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 41,989 shares of Dorman Products, Inc. (US:DORM) valued at $4,381,972 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on August 27, 2025 disclosing 0 shares of Dorman Products, Inc.. The current value of the position is $5,238,128 USD.

Squarepoint Ops LLC has a history of taking positions in derivatives of the underlying security (DORM) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

DORM / Dorman Products, Inc. Historical Put/Call Ratio
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)
2026-05-15 2026-03-31 13F DORMAN PRODS COM 258278100 41,989 41,989 4,382 0.0051
2025-08-27 2025-06-30 13F/A-1 DORMAN PRODS COM 258278100 0 -16,250 -100.00 0 -100.00
2025-08-14 2025-06-30 13F DORMAN PRODS COM 258278100 0 -16,250 0
2025-08-27 2025-03-31 13F/A-1 DORMAN PRODS COM 258278100 16,250 10,336 174.77 1,959 155.61 0.0024
2025-05-15 2025-03-31 13F DORMAN PRODS COM 258278100 16,250 10,336 1,959 0.0024
2025-02-14 2024-12-31 13F DORMAN PRODS COM 258278100 5,914 -12,881 -68.53 766 -63.97 0.0008
2024-11-14 2024-09-30 13F DORMAN PRODS COM 258278100 18,795 18,795 2,126 0.0033
2024-05-15 2024-03-31 13F DORMAN PRODS COM 258278100 0 -26,673 -100.00 0 -100.00
2024-02-14 2023-12-31 13F DORMAN PRODS COM 258278100 26,673 26,673 2,225 0.0042
2023-11-14 2023-09-30 13F DORMAN PRODS COM 258278100 0 -14,271 -100.00 0 -100.00
2023-08-14 2023-06-30 13F DORMAN PRODS COM 258278100 14,271 5,349 59.95 1,125 46.16 0.0034
2023-05-15 2023-03-31 13F DORMAN PRODS COM 258278100 8,922 8,922 770 0.0031
2023-02-14 2022-12-31 13F DORMAN PRODS COM 258278100 0 -27,524 -100.00 0 -100.00
2022-11-14 2022-09-30 13F DORMAN PRODS COM 258278100 27,524 10,635 62.97 2,260 21.96 0.0114
2022-08-15 2022-06-30 13F DORMAN PRODS COM 258278100 16,889 -9,294 -35.50 1,853 -25.52 0.0103
2022-05-16 2022-03-31 13F DORMAN PRODS COM 258278100 26,183 672 2.63 2,488 -13.70 0.0106
2022-02-14 2021-12-31 13F DORMAN PRODS COM 258278100 25,511 -3,903 -13.27 2,883 3.52 0.0076
2021-11-15 2021-09-30 13F DORMAN PRODS COM 258278100 29,414 29,414 2,785 0.0080
2021-08-16 2021-06-30 13F DORMAN PRODS COM 258278100 0 -6,903 -100.00 0 -100.00
2021-05-17 2021-03-31 13F DORMAN PRODS COM 258278100 6,903 3,624 110.52 709 148.77 0.0042
2021-02-16 2020-12-31 13F DORMAN PRODS COM 258278100 3,279 3,279 -52.50 285 -59.80 0.0021
2020-02-14 2019-12-31 13F DORMAN PRODUCTS COM 258278100 0 -11,163 -100.00 0 -100.00
2019-11-14 2019-09-30 13F DORMAN PRODUCTS COM 258278100 11,163 4,998 81.07 888 65.36 0.0079
2019-08-14 2019-06-30 13F DORMAN PRODUCTS COM 258278100 6,165 6,165 -44.77 537 -39.53 0.0052
2018-08-14 2018-06-30 13F DORMAN PRODUCTS COM 258278100 0 -5,311 -100.00 0 -100.00
2018-05-15 2018-03-31 13F DORMAN PRODUCTS COM 258278100 5,311 -5,924 -52.73 352 -48.76 0.0056
2018-02-14 2017-12-31 13F DORMAN PRODUCTS COM 258278100 11,235 11,235 111.54 687 95.17 0.0120
2017-08-14 2017-06-30 13F DORMAN PRODUCTS COM 258278100 0 -6,760 -100.00 0 -100.00
2017-05-15 2017-03-31 13F DORMAN PRODUCTS COM 258278100 6,760 6,760 555 0.0153
2016-08-15 2016-06-30 13F DORMAN PRODUCTS COM 258278100 0 -5,444 -100.00 0 -100.00
2016-05-16 2016-03-31 13F DORMAN PRODUCTS COM 258278100 5,444 5,444 296 0.0229
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-08-14 2024-06-30 13F DORMAN PRODS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F DORMAN PRODS COM Call 25,000 2,410 n/a n/a n/a
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.