Jane Street’s Tectonic Therapeutic TECX Stock Holding History

Jane Street’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	$2.26M	Buy	+65,821	New	+$1.93M	﹤0.01%	4951
2026 Q1	–	Sell	-19,321	Closed	-$475K	–	13264
2025 Q4	$403K	Sell	19,321 -9,399	-33%	-$175K	﹤0.01%	8177
2025 Q3	$451K	Buy	+28,720	New	+$593K	﹤0.01%	8082
2025 Q2	–	Sell	-47,145	Closed	-$835K	–	11178
2025 Q1	$835K	Buy	47,145 +17,443	+59%	+$568K	﹤0.01%	5906
2024 Q4	$1.37M	Buy	+29,702	New	+$1.26M	﹤0.01%	4814
2023 Q1	–	Sell	-2,420	Closed	-$20.7K	–	10091
2022 Q4	$20.7K	Buy	+2,420	New	+$21.3K	﹤0.01%	8605
2022 Q3	–	Sell	-1,193	Closed	-$13K	–	10628
2022 Q2	$13K	Buy	+1,193	New	+$14.1K	﹤0.01%	9257
2020 Q4	–	Sell	-844	Closed	-$132K	–	8230
2020 Q3	$132K	Buy	+844	New	+$170K	﹤0.01%	6654

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

5VM

5AM Venture Management San Francisco, California $288M AUM 313.93% 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

Jane Street's TECX Position: Q2 2026 in Review

Jane Street opened a new position in Tectonic Therapeutic (TECX) in Q2 2026: 65,821 shares worth $2.26M. The stake represents ﹤0.01% of the portfolio and ranks #4951 among its holdings. This is a return to the name: Jane Street previously reported a position in TECX as recently as Q4 2025.

Jane Street first reported a position in TECX in Q3 2020 and has held it in 8 quarters since. 123 funds tracked by Wall St. Rank hold TECX as of Q2 2026.

Jane Street held 65,821 shares of Tectonic Therapeutic worth $2.26M as of Q2 2026.
Tectonic Therapeutic was a new Jane Street position in Q2 2026.
Tectonic Therapeutic made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #4951 holding.
Jane Street first reported a position in Tectonic Therapeutic in Q3 2020 and has held it in 8 quarters since.
123 funds tracked by Wall St. Rank held Tectonic Therapeutic as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.