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
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 $1.9T AUM 41.92% 1-Year Est. Return
TCM
TCG Crossover Management Palo Alto, California $3.5B AUM 1,165.83% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $61.9B AUM 29.81% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
B
Braidwell Stamford, Connecticut $3B AUM 46.72% 1-Year Est. Return
FLAM
First Light Asset Management Edina, Minnesota $1.12B AUM 114.45% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return
5VM
5AM Venture Management San Francisco, California $360M AUM 345.76% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPC
Vestal Point Capital New York $3.58B AUM 189.12% 1-Year Est. Return

SEI Investments's TECX Position: Q1 2026 in Review

SEI Investments increased its Tectonic Therapeutic (TECX) stake by 142% in Q1 2026, buying an estimated $532K and bringing the position to 36,870 shares worth $1.14M. The position accounts for ﹤0.01% of the portfolio, ranked #2299.

SEI Investments first reported a position in TECX in Q4 2025 and has held it in 2 quarters since. 111 funds tracked by Wall St. Rank hold TECX as of Q1 2026.

  • SEI Investments held 36,870 shares of Tectonic Therapeutic worth $1.14M as of Q1 2026.
  • SEI Investments bought 21,619 Tectonic Therapeutic shares in Q1 2026, an estimated $532K.
  • Tectonic Therapeutic made up ﹤0.01% of SEI Investments's portfolio in Q1 2026, its #2299 holding.
  • SEI Investments first reported a position in Tectonic Therapeutic in Q4 2025 and has held it in 2 quarters since.
  • 111 funds tracked by Wall St. Rank held Tectonic Therapeutic as of Q1 2026.

Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.