Trex Company, Inc.
US ˙ NYSE ˙ US89531P1057

SecurityTREX / Trex Company, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership186,332 shares
Latest Disclosed Value $ 6,536,915
Sei Investments Co reports 47.30% decrease in ownership of TREX / Trex Company, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 186,332 shares of Trex Company, Inc. (US:TREX) valued at $6,536,527 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 353,577 shares of Trex Company, Inc.. This represents a change in shares of -47.30% during the quarter. The current value of the position is $7,557,626 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)
2026-02-13 2025-12-31 13F TREX COM 89531P105 186,332 -167,245 -47.30 6,537 -64.22
2025-11-13 2025-09-30 13F TREX COM 89531P105 353,577 1,585 0.45 18,270 -4.56 0.0196
2025-08-14 2025-06-30 13F TREX COM 89531P105 351,992 -52,807 -13.05 19,141 -18.61 0.0222
2025-05-14 2025-03-31 13F/A-1 TREX COM 89531P105 404,799 -16,690 -3.96 23,519 -19.17 0.0303
2025-05-13 2025-03-31 13F TREX COM 89531P105 382,511 -38,978 26,255 0.0286
2025-02-11 2024-12-31 13F TREX COM 89531P105 421,489 66,661 18.79 29,095 23.16 0.0374
2024-11-12 2024-09-30 13F TREX COM 89531P105 354,828 -77,491 -17.92 23,624 -26.27 0.0307
2024-08-13 2024-06-30 13F TREX COM 89531P105 432,319 4,665 1.09 32,043 -24.88 0.0454
2024-05-07 2024-03-31 13F TREX COM 89531P105 427,654 -82,449 -16.16 42,659 1.01 0.0625
2024-02-14 2023-12-31 13F TREX COM 89531P105 510,103 -76,205 -13.00 42,231 16.87 0.0678
2023-11-14 2023-09-30 13F TREX COM 89531P105 586,308 -13,228 -2.21 36,134 -8.07 0.0649
2023-08-11 2023-06-30 13F TREX COM 89531P105 599,536 -6,944 -1.14 39,306 33.16 0.0686
2023-05-12 2023-03-31 13F TREX COM 89531P105 606,480 245,065 67.81 29,517 92.95 0.0548
2023-02-10 2022-12-31 13F TREX COM 89531P105 361,415 -95,961 -20.98 15,299 -23.88 0.0340
2022-11-14 2022-09-30 13F TREX COM 89531P105 457,376 41,577 10.00 20,097 -11.19 0.0448
2022-08-15 2022-06-30 13F TREX COM 89531P105 415,799 161,379 63.43 22,629 36.85 0.0489
2022-05-13 2022-03-31 13F TREX COM 89531P105 254,420 35,833 16.39 16,536 -44.10 0.0332
2022-02-14 2021-12-31 13F TREX COM 89531P105 218,587 27,418 14.34 29,582 51.32 0.0555
2021-11-12 2021-09-30 13F TREX COM 89531P105 191,169 14,855 8.43 19,549 7.98 0.0410
2021-08-06 2021-06-30 13F TREX COM 89531P105 176,314 22,318 14.49 18,104 29.37 0.0401
2021-05-12 2021-03-31 13F TREX COM 89531P105 153,996 26,330 20.62 13,994 30.25 0.0353
2021-02-08 2020-12-31 13F TREX COM 89531P105 127,666 11,905 10.28 10,744 29.35 0.0278
2020-12-04 2020-09-30 13F/A-1 TREX COM 89531P105 115,761 52,031 81.64 8,306 -0.10 0.0241
2020-11-06 2020-09-30 13F TREX COM 89531P105 116,696 52,966 8,373 20,160.3224
2020-08-17 2020-06-30 13F/A-1 TREX COM 89531P105 63,730 -11,550 -15.34 8,314 37.92 0.0258
2020-08-11 2020-06-30 13F TREX COM 89531P105 52,152 -23,128 5,290 14,349.4066
2020-05-14 2020-03-31 13F TREX COM 89531P105 75,280 32,142 74.51 6,028 55.80 0.0221
2020-02-06 2019-12-31 13F TREX COM 89531P105 43,138 23,697 121.89 3,869 120.71 0.0115
2019-11-12 2019-09-30 13F TREX COM 89531P105 19,441 8,955 85.40 1,753 131.27 0.0045
2019-08-14 2019-06-30 13F TREX COM 89531P105 10,486 2,081 24.76 758 44.11 0.0025
2019-05-15 2019-03-31 13F TREX COM 89531P105 8,405 3,833 83.84 526 67.52 0.0018
2019-02-13 2018-12-31 13F TREX COM 89531P105 4,572 1,733 61.04 314 44.04 0.0011
2018-11-08 2018-09-30 13F TREX COM 89531P105 2,839 -20,425 -87.80 218 -85.02 0.0008
2018-08-03 2018-06-30 13F TREX COM 89531P105 23,264 20,874 873.39 1,455 459.62 0.0049
2018-05-11 2018-03-31 13F TREX COM 89531P105 2,390 1,136 90.59 260 91.18 0.0010
2018-02-08 2017-12-31 13F TREX COM 89531P105 1,254 192 18.08 136 43.16 0.0005
2017-11-06 2017-09-30 13F TREX COM 89531P105 1,062 425 66.72 95 120.93 0.0003
2017-07-31 2017-06-30 13F TREX COM 89531P105 637 637 43 0.0002
2016-05-10 2016-03-31 13F/A-1 DIREXION SHS ETF TR COM 89531P105 0 -59,010 -100.00 0 -100.00
2016-02-03 2015-12-31 13F TREX COM 89531P105 59,010 49,848 544.07 2,245 636.07 0.0137
2015-11-02 2015-09-30 13F/A-1 TREX COM 89531P105 9,162 -36,938 -80.13 305 -86.62 0.0028
2015-10-30 2015-09-30 13F DIREXION SHS ETF TR COM 89531P105 9,162 306
2015-08-07 2015-06-30 13F/A-1 TREX COM 89531P105 46,100 0 0.00 2,279 -9.35 0.0206
2015-08-04 2015-06-30 13F TREX COM 89531P105 46,100 0 2,279 0.0206
2015-05-14 2015-03-31 13F/A-1 TREX COM 89531P105 46,100 -13,900 -23.17 2,514 -1.60 0.0218
2015-05-01 2015-03-31 13F TREX COM 89531P105 46,100 2,514
2015-02-10 2014-12-31 13F TREX COM 89531P105 60,000 60,000 2,555 0.0226
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.