5AM Venture Management’s Tectonic Therapeutic TECX Stock Holding History

5AM Venture Management’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	$20.9M	Hold	606,660	–	–	7.24%	7
2026 Q1	$18.8M	Hold	606,660	–	–	5.21%	8
2025 Q4	$12.7M	Buy	606,660 +95,000	+19%	+$1.77M	3.98%	11
2025 Q3	$8.03M	Hold	511,660	–	–	2.94%	15
2025 Q2	$10.2M	Hold	511,660	–	–	3.91%	10
2025 Q1	$9.06M	Sell	511,660 -85,000	-14%	-$2.77M	3.43%	11
2024 Q4	$27.5M	Sell	596,660 -49,864	-8%	-$2.11M	6.57%	4
2024 Q3	$19.6M	Hold	646,524	–	–	4.05%	9
2024 Q2	$10.6M	Buy	+646,524	New	+$10.4M	2.38%	14

Other funds holding TECX

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

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

Braidwell Stamford, Connecticut $2.7B AUM 88.53% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

VPC

Vestal Point Capital New York $4.28B AUM 239% 1-Year Est. Return

Bollard Group Boston, Massachusetts $3.29B AUM 4.86% 1-Year Est. Return

5AM Venture Management's TECX Position: Q2 2026 in Review

5AM Venture Management held its Tectonic Therapeutic (TECX) position steady in Q2 2026 at 606,660 shares worth $20.9M. The position accounts for 7.24% of the portfolio, ranked #7.

5AM Venture Management first reported a position in TECX in Q2 2024 and has held it in 9 quarters since. The position peaked at $27.5M in Q4 2024. 123 funds tracked by Wall St. Rank hold TECX as of Q2 2026.

5AM Venture Management held 606,660 shares of Tectonic Therapeutic worth $20.9M as of Q2 2026.
5AM Venture Management left its Tectonic Therapeutic share count unchanged in Q2 2026.
Tectonic Therapeutic made up 7.24% of 5AM Venture Management's portfolio in Q2 2026, its #7 holding.
5AM Venture Management first reported a position in Tectonic Therapeutic in Q2 2024 and has held it in 9 quarters since.
5AM Venture Management's Tectonic Therapeutic position peaked at $27.5M in Q4 2024.
123 funds tracked by Wall St. Rank held Tectonic Therapeutic as of Q2 2026.

Based on 5AM Venture Management's 13F filing for Q2 2026, filed 14 Aug 2026.