SEI Investments
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SEI Investments’s Adaptive Biotechnologies ADPT Stock Holding History

SEI Investments’s Portfolio ADPT Stock Details ADPT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$10.9M Sell
509,797
-50,757
-9% -$778K 0.01% 1099
2026
Q1 		$7.78M Buy
560,554
+243,985
+77% +$3.89M 0.01% 1266
2025
Q4 		$5.14M Buy
316,569
+196,846
+164% +$3.21M 0.01% 1360
2025
Q3 		$1.79M Sell
119,723
-27,169
-18% -$331K ﹤0.01% 1743
2025
Q2 		$1.71M Buy
146,892
+128,453
+697% +$1.17M ﹤0.01% 1714
2025
Q1 		$137K Buy
18,439
+2,995
+19% +$23K ﹤0.01% 2540
2024
Q4 		$92.6K Buy
15,444
+19
+0.1% +$105 ﹤0.01% 2596
2024
Q3 		$79K Buy
15,425
+69
+0.4% +$301 ﹤0.01% 2591
2024
Q2 		$55.6K Sell
15,356
-49,461
-76% -$157K ﹤0.01% 2581
2024
Q1 		$208K Buy
64,817
+37
+0.1% +$143 ﹤0.01% 2416
2023
Q4 		$317K Buy
64,780
+220
+0.3% +$1K ﹤0.01% 2286
2023
Q3 		$352K Buy
64,560
+20,152
+45% +$133K ﹤0.01% 2242
2023
Q2 		$298K Sell
44,408
-2,453
-5% -$18.2K ﹤0.01% 2338
2023
Q1 		$414K Buy
46,861
+25,591
+120% +$226K ﹤0.01% 2208
2022
Q4 		$163K Buy
21,270
+2,078
+11% +$16.2K ﹤0.01% 2386
2022
Q3 		$137K Sell
19,192
-2,223
-10% -$20.9K ﹤0.01% 2529
2022
Q2 		$173K Sell
21,415
-48,233
-69% -$424K ﹤0.01% 2498
2022
Q1 		$967K Buy
69,648
+641
+0.9% +$10.1K ﹤0.01% 1827
2021
Q4 		$1.94M Buy
69,007
+4,396
+7% +$135K ﹤0.01% 1600
2021
Q3 		$2.2M Sell
64,611
-1,874
-3% -$67.8K ﹤0.01% 1460
2021
Q2 		$2.72M Sell
66,485
-18,190
-21% -$707K 0.01% 1371
2021
Q1 		$3.8M Sell
84,675
-50,272
-37% -$2.72M 0.01% 1168
2020
Q4 		$7.96M Buy
134,947
+15,216
+13% +$785K 0.02% 749
2020
Q3 		$5.83M Buy
119,731
+5,941
+5% +$250K 0.02% 800
2020
Q2 		$5.5M Sell
113,790
-5,172
-4% -$189K 0.02% 816
2020
Q1 		$3.31M Buy
118,962
+62,815
+112% +$1.75M 0.01% 939
2019
Q4 		$1.68M Buy
56,147
+27,647
+97% +$794K 0.01% 1415
2019
Q3 		$881K Buy
28,500
+13,189
+86% +$538K ﹤0.01% 1654
2019
Q2 		$740K Buy
+15,311
New +$678K ﹤0.01% 1702

Other funds holding ADPT

Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.1B AUM 21.36% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $30.6B AUM 61.81% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

SEI Investments's ADPT Position: Q2 2026 in Review

SEI Investments reduced its Adaptive Biotechnologies (ADPT) stake by 9.1% in Q2 2026, selling an estimated $778K and leaving 509,797 shares worth $10.9M. The position accounts for 0.01% of the portfolio, ranked #1099.

SEI Investments first reported a position in ADPT in Q2 2019 and has held it in 29 quarters since. 300 funds tracked by Wall St. Rank hold ADPT as of Q2 2026.

  • SEI Investments held 509,797 shares of Adaptive Biotechnologies worth $10.9M as of Q2 2026.
  • SEI Investments sold 50,757 Adaptive Biotechnologies shares in Q2 2026, an estimated $778K.
  • Adaptive Biotechnologies made up 0.01% of SEI Investments's portfolio in Q2 2026, its #1099 holding.
  • SEI Investments first reported a position in Adaptive Biotechnologies in Q2 2019 and has held it in 29 quarters since.
  • 300 funds tracked by Wall St. Rank held Adaptive Biotechnologies as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.