American Century Companies’s Tectonic Therapeutic TECX Stock Holding History

American Century Companies’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	$387K	Buy	+12,534	New	+$308K	﹤0.01%	2580
2025 Q2	–	Sell	-12,057	Closed	-$214K	–	2969
2025 Q1	$214K	Buy	+12,057	New	+$393K	﹤0.01%	2750

Other funds holding TECX

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 Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

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

American Century Companies's TECX Position: Q1 2026 in Review

American Century Companies opened a new position in Tectonic Therapeutic (TECX) in Q1 2026: 12,534 shares worth $387K. The stake represents ﹤0.01% of the portfolio and ranks #2580 among its holdings. This is a return to the name: American Century Companies previously reported a position in TECX as recently as Q1 2025.

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

American Century Companies held 12,534 shares of Tectonic Therapeutic worth $387K as of Q1 2026.
Tectonic Therapeutic was a new American Century Companies position in Q1 2026.
Tectonic Therapeutic made up ﹤0.01% of American Century Companies's portfolio in Q1 2026, its #2580 holding.
American Century Companies first reported a position in Tectonic Therapeutic in Q1 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 American Century Companies's 13F filing for Q1 2026, filed 15 May 2026.