Tectonic Therapeutic, Inc. - Common Stock $0.0001 par value per share (TECX) Institutional Ownership

13F Institutional Holders and Ownership History from Q2 2024 to Q4 2025

Type / Class
Equity / Common Stock $0.0001 par value per share
Symbol
TECX on Nasdaq
Shares outstanding
13,693,835
Price per share
$20.86
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
12,105,071
Total reported value
$189,928,399
% of total 13F portfolios
0%
Share change
+6,264
Value change
-$10,912,119
Number of holders
99
Price from insider filings
$20.86
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Tectonic Therapeutic, Inc. - Common Stock $0.0001 par value per share (TECX) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
SPRINGER TIMOTHY A 32% +7.9% $96,537,428 +$1,958,250 4,313,558 +2.1% Timothy A. Springer 03 Apr 2025
FMR LLC 15% +47% $62,650,568 +$28,714,995 2,799,400 +85% FMR LLC 31 Mar 2025
MCGUIRE TERRANCE 6.3% 0% $14,725,503 -$11,190,022 657,976 -43% Terrance McGuire 03 Apr 2025

As of 30 Sep 2025, 99 institutional investors reported holding 12,105,071 shares of Tectonic Therapeutic, Inc. - Common Stock $0.0001 par value per share (TECX). This represents 88% of the company’s total 13,693,835 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of Tectonic Therapeutic, Inc. - Common Stock $0.0001 par value per share (TECX) together control 77% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
FMR LLC 20% 2,806,781 +0.21% 0% $44,038,390
BlackRock, Inc. 6% 827,853 +8.7% 0% $12,989,015
BRAIDWELL LP 5.4% 736,867 0.34% $11,561,443
FARALLON CAPITAL MANAGEMENT LLC 4.7% 640,000 -25% 0.06% $10,041,600
VANGUARD GROUP INC 4.2% 569,480 -2.6% 0% $8,935,141
5AM Venture Management, LLC 3.7% 511,660 0% 2.9% $8,027,945
Point72 Asset Management, L.P. 3.1% 421,755 +83% 0.01% $6,617,341
Prosight Management, LP 2.8% 379,254 -14% 1.4% $5,950,495
Aberdeen Group plc 2.6% 356,176 0.01% $5,588,401
Bollard Group LLC 2.2% 302,953 0% 0.12% $4,753,000
CITADEL ADVISORS LLC 2.2% 298,388 +81% 0% $4,681,708
GEODE CAPITAL MANAGEMENT, LLC 2% 269,353 -1.1% 0% $4,226,817
Pale Fire Capital SE 1.9% 259,726 0.45% $4,075,101
TFG Asset Management GP Ltd 1.8% 243,728 +6.5% 0.56% $3,824,092
MILLENNIUM MANAGEMENT LLC 1.7% 238,170 +218% 0% $3,736,887
KENNEDY CAPITAL MANAGEMENT LLC 1.5% 208,776 0.07% $3,275,695
First Light Asset Management, LLC 1.5% 202,393 0.3% $3,175,546
Woodline Partners LP 1.5% 200,000 -38% 0.01% $3,138,000
SECTORAL ASSET MANAGEMENT INC 1.4% 192,770 +95% 1.9% $3,024,561
STEMPOINT CAPITAL LP 1.4% 188,999 +372% 0.6% $2,965,394
TANG CAPITAL MANAGEMENT LLC 1.3% 179,166 0% 0.11% $2,811,114
STATE STREET CORP 1.2% 165,531 +26% 0% $2,597,181
Ally Bridge Group (NY) LLC 1% 138,595 -15% 1.8% $2,174,556
SUPERSTRING CAPITAL MANAGEMENT LP 0.87% 119,286 +51% 1.8% $1,871,597
SPHERA FUNDS MANAGEMENT LTD. 0.85% 115,908 0.43% $1,818,597

Institutional Holders of Tectonic Therapeutic, Inc. - Common Stock $0.0001 par value per share (TECX) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 52 $1,085 +$543 $20.86 3
2025 Q3 12,105,071 $189,928,399 -$10,912,119 $15.69 99
2025 Q2 12,112,699 $240,681,548 +$18,199,970 $19.87 82
2025 Q1 11,227,627 $198,820,413 +$3,981,198 $17.71 78
2024 Q4 7,686,866 $354,905,739 +$30,548,457 $46.17 70
2024 Q3 7,175,807 $217,428,427 +$53,307,772 $30.30 52
2024 Q2 5,345,881 $88,045,301 +$88,041,200 $16.47 39