더 트레이드 데스크, Inc.
MX ˙ BMV ˙ US88339J1051
SecurityMX:TTD / The Trade Desk, Inc.
InstitutionFlagship Harbor Advisors, Llc
Latest Disclosed Ownership19,389 shares
Latest Disclosed Value $ 439,939
Flagship Harbor Advisors, Llc reports 12.20% decrease in ownership of TTD / The Trade Desk, Inc.

On April 28, 2026 - Flagship Harbor Advisors, Llc filed a 13F-HR form disclosing ownership of 19,389 shares of The Trade Desk, Inc. (MX:TTD) valued at $439,939 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 22,084 shares of The Trade Desk, Inc.. This represents a change in shares of -12.20% during the quarter.

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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-28 2026-03-31 13F THE TRADE DESK COM CL A 88339J105 19,389 -2,695 -12.20 440 -47.61 0.0193
2026-01-21 2025-12-31 13F TRADE DESK Common Stock 88339J105 22,084 -100 -0.45 838 -22.91 0.0396
2025-11-05 2025-09-30 13F THE TRADE DESK COM CL A 88339J105 22,184 -345 -1.53 1,087 -32.94 0.0473
2025-08-04 2025-06-30 13F THE TRADE DESK COM CL A 88339J105 22,529 -309 -1.35 1,622 29.78 0.0768
2025-04-22 2025-03-31 13F THE TRADE DESK COM CL A 88339J105 22,838 -250 -1.08 1,250 -53.96 0.0657
2025-01-21 2024-12-31 13F THE TRADE DESK COM CL A 88339J105 23,088 0 0.00 2,714 7.19 0.1425
2024-10-21 2024-09-30 13F THE TRADE DESK COM CL A 88339J105 23,088 -80 -0.35 2,532 11.89 0.1390
2025-12-02 2024-06-30 13F THE TRADE DESK COM CL A 88339J105 23,168 -251 -1.07 2,263 10.50 0.1360
2024-04-16 2024-03-31 13F THE TRADE DESK COM CL A 88339J105 23,419 681 2.99 2,047 25.12 0.1316
2024-01-10 2023-12-31 13F THE TRADE DESK COM CL A 88339J105 22,738 263 1.17 1,636 -6.83 0.1190
2023-10-17 2023-09-30 13F THE TRADE DESK COM CL A 88339J105 22,475 396 1.79 1,756 3.05 0.1461
2023-07-11 2023-06-30 13F THE TRADE DESK COM CL A 88339J105 22,079 25 0.11 1,705 26.88 0.1408
2023-04-12 2023-03-31 13F THE TRADE DESK COM CL A 88339J105 22,054 304 1.40 1,343 37.74 0.1265
2023-01-13 2022-12-31 13F THE TRADE DESK COM CL A 88339J105 21,750 149 0.69 975 -24.48 0.1000
2022-10-13 2022-09-30 13F THE TRADE DESK COM CL A 88339J105 21,601 -479 -2.17 1,291 39.57 0.1497
2022-07-13 2022-06-30 13F THE TRADE DESK COM CL A 88339J105 22,080 -292 -1.31 925 -40.28 0.1039
2022-04-13 2022-03-31 13F THE TRADE DESK COM CL A 88339J105 22,372 455 2.08 1,549 -22.86 0.1493
2022-02-17 2021-12-31 13F/A-1 THE TRADE DESK COM CL A 88339J105 21,917 -197 -0.89 2,008 17.36 0.1900
2022-02-10 2021-12-31 13F THE TRADE DESK COM CL A 88339J105 21,917 -197 2,008 0.1900
2021-11-01 2021-09-30 13F THE TRADE DESK COM CL A 88339J105 22,114 0 0.00 1,711 0.00 0.1838
2021-07-26 2021-06-30 13F THE TRADE DESK COM CL A 88339J105 22,114 19,977 934.82 1,711 22.83 0.1835
2021-05-03 2021-03-31 13F THE TRADE DESK COM CL A 88339J105 2,137 26 1.23 1,393 -17.62 0.1581
2021-02-08 2020-12-31 13F THE TRADE DESK COM CL A 88339J105 2,111 -88 -4.00 1,691 48.33 0.2097
2020-10-13 2020-09-30 13F TRADE DESK Common Stock 88339J105 2,199 53 2.47 1,140 30.73 0.1539
2020-07-31 2020-06-30 13F TRADE DESK Common Stock 88339J105 2,146 100 4.89 872 120.76 0.1280
2020-05-12 2020-03-31 13F TRADE DESK Common Stock 88339J105 2,046 1,694 481.25 395 334.07 0.0790
2020-02-14 2019-12-31 13F TRADE DESK Common Stock 88339J105 352 165 88.24 91 160.00 0.0159
2019-10-22 2019-09-30 13F TRADE DESK Common Stock 88339J105 187 -4 -2.09 35 -18.60 0.0069
2019-07-22 2019-06-30 13F TRADE DESK Common Stock 88339J105 191 130 213.11 43 258.33 0.0089
2019-04-15 2019-03-31 13F TRADE DESK Common Stock 88339J105 61 25 69.44 12 200.00 0.0025
2019-01-26 2018-12-31 13F TRADE DESK COM 88339J105 36 0 0.00 4 -20.00 0.0010
2018-11-05 2018-09-30 13F TRADE DESK Common Stock 88339J105 36 0 0.00 5 66.67 0.0009
2018-08-14 2018-06-30 13F TRADE DESK Common Stock 88339J105 36 36 3 0.0006
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.