SEI Investments
TECX

SEI Investments’s Tectonic Therapeutic TECX Stock Holding History

SEI Investments’s Portfolio TECX Stock Details TECX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$585K Sell
17,029
-19,841
-54% -$583K ﹤0.01% 2562
2026
Q1 		$1.14M Buy
36,870
+21,619
+142% +$532K ﹤0.01% 2299
2025
Q4 		$318K Buy
+15,251
New +$283K ﹤0.01% 2708

Other funds holding TECX

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
TCM
TCG Crossover Management Palo Alto, California $4.16B AUM 983.43% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
FLAM
First Light Asset Management Edina, Minnesota $1.65B AUM 203.21% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return
5VM
5AM Venture Management San Francisco, California $288M AUM 313.93% 1-Year Est. Return
B
Braidwell Stamford, Connecticut $2.7B AUM 88.53% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
VPC
Vestal Point Capital New York $4.28B AUM 239% 1-Year Est. Return

SEI Investments's TECX Position: Q2 2026 in Review

SEI Investments reduced its Tectonic Therapeutic (TECX) stake by 54% in Q2 2026, selling an estimated $583K and leaving 17,029 shares worth $585K. The position accounts for ﹤0.01% of the portfolio, ranked #2562.

SEI Investments first reported a position in TECX in Q4 2025 and has held it in 3 quarters since. The position peaked at $1.14M in Q1 2026. 122 funds tracked by Wall St. Rank hold TECX as of Q2 2026.

  • SEI Investments held 17,029 shares of Tectonic Therapeutic worth $585K as of Q2 2026.
  • SEI Investments sold 19,841 Tectonic Therapeutic shares in Q2 2026, an estimated $583K.
  • Tectonic Therapeutic made up ﹤0.01% of SEI Investments's portfolio in Q2 2026, its #2562 holding.
  • SEI Investments first reported a position in Tectonic Therapeutic in Q4 2025 and has held it in 3 quarters since.
  • SEI Investments's Tectonic Therapeutic position peaked at $1.14M in Q1 2026.
  • 122 funds tracked by Wall St. Rank held Tectonic Therapeutic as of Q2 2026.

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