Citadel Advisors’s Tectonic Therapeutic TECX Stock Holding History

Citadel Advisors’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	–	Sell	-22,900	Closed	-$478K	–	14505
2025 Q4	$478K	Buy	+22,900	New	+$426K	﹤0.01%	9136
2024 Q2	–	Sell	-8	Closed	-$128	–	15620
2024 Q1	$128	Sell	8 -50	-86%	-$792	﹤0.01%	14415
2023 Q4	$952	Hold	58	–	–	﹤0.01%	13912
2023 Q3	$1.08K	Buy	+58	New	+$1.02K	﹤0.01%	13922
2023 Q2	–	Sell	-83	Closed	-$1K	–	15376
2023 Q1	$1K	Buy	83 +66	+388%	+$919	﹤0.01%	14382
2022 Q4	$143	Buy	+17	New	+$150	﹤0.01%	14751
2021 Q4	–	Sell	-883	Closed	-$59K	–	14932
2021 Q3	$59K	Buy	+883	New	+$72.5K	﹤0.01%	13278
2021 Q2	–	Sell	-1,742	Closed	-$265K	–	14572
2021 Q1	$265K	Buy	+1,742	New	+$283K	﹤0.01%	11130

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

Citadel Advisors's TECX Position: Q2 2026 in Review

Citadel Advisors opened a new position in Tectonic Therapeutic (TECX) in Q2 2026: 90,393 shares worth $3.11M. The stake represents ﹤0.01% of the portfolio and ranks #5636 among its holdings. This is a return to the name: Citadel Advisors previously reported a position in TECX as recently as Q4 2025.

Citadel Advisors first reported a position in TECX in Q2 2018 and has held it in 29 quarters since. The position peaked at $77.4M in Q3 2018. 123 funds tracked by Wall St. Rank hold TECX as of Q2 2026.

Citadel Advisors held 90,393 shares of Tectonic Therapeutic worth $3.11M as of Q2 2026.
Tectonic Therapeutic was a new Citadel Advisors position in Q2 2026.
Tectonic Therapeutic made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #5636 holding.
Citadel Advisors first reported a position in Tectonic Therapeutic in Q2 2018 and has held it in 29 quarters since.
Citadel Advisors's Tectonic Therapeutic position peaked at $77.4M in Q3 2018.
123 funds tracked by Wall St. Rank held Tectonic Therapeutic as of Q2 2026.

Based on Citadel Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.