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

Historical Holders from Q2 2024 to Q4 2025

Symbol
TECX on Nasdaq
Type / Class
Equity / Common Stock $0.0001 par value per share
Shares outstanding
18,702,420
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares, excl. options
12,105,071
Holdings value
$189,928,399
% of all portfolios
0%
Number of holders
99
Number of buys
57
Number of sells
31
Average buys %
+0%
Average sells %
-0%
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% $71,950,147 +$1,459,500 4,313,558 +2.1% Timothy A. Springer 03 Apr 2025
FMR LLC 15% +47% $46,693,989 +$21,401,524 2,799,400 +85% FMR LLC 31 Mar 2025
MCGUIRE TERRANCE 6.3% 0% $10,975,040 -$8,340,017 657,976 -43% Terrance McGuire 03 Apr 2025
As of 30 Sep 2025 Tectonic Therapeutic, Inc. - Common Stock $0.0001 par value per share (TECX) has 99 institutional shareholders that have filed 13F forms with the Securities Exchange Commission (SEC). These institutions hold a total of 12,105,071 shares of 18,702,420 outstanding shares and own 65% of the company stock as of 30 Sep 2025.

Top 25 institutional shareholders of Tectonic Therapeutic, Inc. - Common Stock $0.0001 par value per share (TECX) own 57% of the company based on 13F filings as of 30 Sep 2025

Filer Ownership Nb Shares Share Change % Portfolio % Holdings Value
FMR LLC 15% 2,806,781 +0.21% 0% $44,038,390
BlackRock, Inc. 4.4% 827,853 +8.7% 0% $12,989,015
BRAIDWELL LP 3.9% 736,867 0.34% $11,561,443
FARALLON CAPITAL MANAGEMENT LLC 3.4% 640,000 -25% 0.06% $10,041,600
VANGUARD GROUP INC 3% 569,480 -2.6% 0% $8,935,141
5AM Venture Management, LLC 2.7% 511,660 0% 2.9% $8,027,945
Point72 Asset Management, L.P. 2.3% 421,755 +83% 0.01% $6,617,341
Prosight Management, LP 2% 379,254 -14% 1.4% $5,950,495
Aberdeen Group plc 1.9% 356,176 0.01% $5,588,401
Bollard Group LLC 1.6% 302,953 0% 0.12% $4,753,000
CITADEL ADVISORS LLC 1.6% 298,388 +81% 0% $4,681,708
GEODE CAPITAL MANAGEMENT, LLC 1.4% 269,353 -1.1% 0% $4,226,817
Pale Fire Capital SE 1.4% 259,726 0.45% $4,075,101
TFG Asset Management GP Ltd 1.3% 243,728 +6.5% 0.56% $3,824,092
MILLENNIUM MANAGEMENT LLC 1.3% 238,170 +218% 0% $3,736,887
KENNEDY CAPITAL MANAGEMENT LLC 1.1% 208,776 0.07% $3,275,695
First Light Asset Management, LLC 1.1% 202,393 0.3% $3,175,546
Woodline Partners LP 1.1% 200,000 -38% 0.01% $3,138,000
SECTORAL ASSET MANAGEMENT INC 1% 192,770 +95% 1.9% $3,024,561
STEMPOINT CAPITAL LP 1% 188,999 +372% 0.6% $2,965,394
TANG CAPITAL MANAGEMENT LLC 0.96% 179,166 0% 0.11% $2,811,114
STATE STREET CORP 0.89% 165,531 +26% 0% $2,597,181
Ally Bridge Group (NY) LLC 0.74% 138,595 -15% 1.8% $2,174,556
SUPERSTRING CAPITAL MANAGEMENT LP 0.64% 119,286 +51% 1.8% $1,871,597
SPHERA FUNDS MANAGEMENT LTD. 0.62% 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 Investors
2025 Q4 47 $980 +$438 $20.85 2
2025 Q3 12,105,071 $189,928,399 -$10,912,119 $15.69 99
2025 Q2 12,112,699 $240,681,548 +$18,199,972 $19.87 82
2025 Q1 11,227,627 $198,820,413 +$3,981,181 $17.71 78
2024 Q4 7,686,866 $354,905,739 +$30,548,455 $46.17 70
2024 Q3 7,175,807 $217,428,427 +$53,307,776 $30.30 52
2024 Q2 5,345,881 $88,045,301 +$88,041,199 $16.47 39