The Trade Desk, Inc.
US ˙ NasdaqGM ˙ US88339J1051

SecurityTTD / The Trade Desk, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership198,062 shares
Latest Disclosed Value $ 7,518,761
Sei Investments Co reports 66.35% decrease in ownership of TTD / The Trade Desk, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 198,062 shares of The Trade Desk, Inc. (US:TTD) valued at $7,518,434 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 588,614 shares of The Trade Desk, Inc.. This represents a change in shares of -66.35% during the quarter. The current value of the position is $4,072,155 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 THE TRADE DESK COM CL A 88339J105 198,062 -390,552 -66.35 7,519 -73.94 0.0074
2025-11-13 2025-09-30 13F THE TRADE DESK COM CL A 88339J105 588,614 -185,768 -23.99 28,849 -48.25 0.0310
2025-08-14 2025-06-30 13F THE TRADE DESK COM CL A 88339J105 774,382 191,376 32.83 55,749 74.75 0.0646
2025-05-14 2025-03-31 13F/A-1 THE TRADE DESK COM CL A 88339J105 583,006 235,280 67.66 31,901 -21.94 0.0411
2025-05-13 2025-03-31 13F THE TRADE DESK COM CL A 88339J105 296,315 -51,411 33,863 0.0368
2025-02-11 2024-12-31 13F THE TRADE DESK COM CL A 88339J105 347,726 18,362 5.57 40,870 13.16 0.0525
2024-11-12 2024-09-30 13F THE TRADE DESK COM CL A 88339J105 329,364 34,124 11.56 36,115 25.24 0.0469
2024-08-13 2024-06-30 13F THE TRADE DESK COM CL A 88339J105 295,240 49,052 19.92 28,836 33.99 0.0409
2024-05-07 2024-03-31 13F THE TRADE DESK COM CL A 88339J105 246,188 34,520 16.31 21,521 41.30 0.0315
2024-02-14 2023-12-31 13F THE TRADE DESK COM CL A 88339J105 211,668 -143,830 -40.46 15,232 -45.18 0.0245
2023-11-14 2023-09-30 13F THE TRADE DESK COM CL A 88339J105 355,498 28,416 8.69 27,783 10.01 0.0499
2023-08-11 2023-06-30 13F THE TRADE DESK COM CL A 88339J105 327,082 -18,656 -5.40 25,257 19.93 0.0441
2023-05-12 2023-03-31 13F THE TRADE DESK COM CL A 88339J105 345,738 1,417 0.41 21,059 36.44 0.0391
2023-02-10 2022-12-31 13F THE TRADE DESK COM CL A 88339J105 344,321 -29,768 -7.96 15,435 -30.95 0.0343
2022-11-14 2022-09-30 13F THE TRADE DESK COM CL A 88339J105 374,089 -20,479 -5.19 22,354 36.18 0.0499
2022-08-15 2022-06-30 13F THE TRADE DESK COM CL A 88339J105 394,568 140,847 55.51 16,415 -6.88 0.0354
2022-05-13 2022-03-31 13F THE TRADE DESK COM CL A 88339J105 253,721 -10,929 -4.13 17,628 -27.38 0.0354
2022-02-14 2021-12-31 13F THE TRADE DESK COM CL A 88339J105 264,650 -39,579 -13.01 24,273 13.32 0.0455
2021-11-12 2021-09-30 13F THE TRADE DESK COM CL A 88339J105 304,229 -7,300 -2.34 21,420 -11.37 0.0449
2021-08-06 2021-06-30 13F THE TRADE DESK COM CL A 88339J105 311,529 276,369 786.03 24,169 3.05 0.0536
2021-05-12 2021-03-31 13F THE TRADE DESK COM CL A 88339J105 35,160 -1,577 -4.29 23,454 -20.36 0.0591
2021-02-08 2020-12-31 13F THE TRADE DESK COM CL A 88339J105 36,737 -3,331 -8.31 29,450 41.45 0.0761
2020-12-04 2020-09-30 13F/A-1 THE TRADE DESK COM CL A 88339J105 40,068 224 0.56 20,820 28.52 0.0603
2020-11-06 2020-09-30 13F THE TRADE DESK COM CL A 88339J105 40,068 224 20,820 50,129.9309
2020-08-17 2020-06-30 13F/A-1 THE TRADE DESK COM CL A 88339J105 39,844 19,976 100.54 16,200 321.44 0.0503
2020-08-11 2020-06-30 13F THE TRADE DESK COM CL A 88339J105 18,557 -1,311 4,977 13,500.3774
2020-05-14 2020-03-31 13F THE TRADE DESK COM CL A 88339J105 19,868 1,505 8.20 3,844 -19.75 0.0141
2020-02-06 2019-12-31 13F THE TRADE DESK COM CL A 88339J105 18,363 1,815 10.97 4,790 53.82 0.0143
2019-11-12 2019-09-30 13F THE TRADE DESK COM CL A 88339J105 16,548 -17,164 -50.91 3,114 -59.36 0.0080
2019-08-14 2019-06-30 13F THE TRADE DESK COM CL A 88339J105 33,712 6,871 25.60 7,662 44.19 0.0250
2019-05-15 2019-03-31 13F THE TRADE DESK COM CL A 88339J105 26,841 6,229 30.22 5,314 110.87 0.0178
2019-02-13 2018-12-31 13F THE TRADE DESK COM CL A 88339J105 20,612 16,745 433.02 2,520 333.73 0.0090
2018-11-08 2018-09-30 13F THE TRADE DESK COM CL A 88339J105 3,867 -12,707 -76.67 581 -62.61 0.0021
2018-08-03 2018-06-30 13F THE TRADE DESK COM CL A 88339J105 16,574 16,560 118,285.71 1,554 155,300.00 0.0053
2018-05-11 2018-03-31 13F THE TRADE DESK COM CL A 88339J105 14 -986 -98.60 1 -97.83 0.0000
2018-02-08 2017-12-31 13F THE TRADE DESK COM CL A 88339J105 1,000 0 0.00 46 -25.81 0.0002
2017-11-06 2017-09-30 13F THE TRADE DESK COM CL A 88339J105 1,000 1,000 62 0.0002
2017-07-31 2017-06-30 13F THE TRADE DESK COM CL A 88339J105 0 -40 -100.00 0 -100.00
2017-05-05 2017-03-31 13F THE TRADE DESK COM CL A 88339J105 40 40 1 0.0000
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.