TECX

Tectonic Therapeutic, Inc.

Biological Products, (No Diagnostic Substances)NasdaqNon-accelerated filer<br>Smaller reporting company

Total Trades

9

Buys

6

Sells

2

Largest Trade

N/A

Insiders

5

Institutional Funds

77

Inst. Value

$1M+

Activist Filings

23

Insider Trades

InsiderTitleTypeValueSharesPriceDate
McNamara PeterChief Scientific O…GRANTN/A23KMar 5, 2026
McNamara PeterChief Scientific O…SELL$50K–$100K3K$23.53Mar 5, 2026
REICIN ALISECEOBUY$50K–$100K3K$21.10Feb 12, 2026
Lochner DanielCFOBUY$100K–$500K6K$21.61Feb 11, 2026
SPRINGER TIMOTHY ADirectorBUY$1M+142K$16.20Apr 11, 2025
SPRINGER TIMOTHY ADirectorBUY$1M+500K$17.10Apr 9, 2025
MCGUIRE TERRANCEDirectorSELL$1M+500K$17.10Apr 7, 2025
SPRINGER TIMOTHY ADirectorBUY$1M+300K$33.59Oct 24, 2024
SPRINGER TIMOTHY ADirectorBUY$1M+50K$28.82Sep 26, 2024
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Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

TCG Crossover GP II, LLC

SC 13G · Feb 27, 2026

3.1%

585K shares

Aberdeen Group plc

SC 13G · Jan 29, 2026

6.1%

1.1M shares

EcoR1 Capital, LLC

SC 13G/A · Nov 14, 2025

0.0%

0 shares

Deep Track Capital, LP

SC 13G/A · Nov 14, 2025

0.0%

0 shares

EcoR1 Capital, LLC

SC 13G/A · May 15, 2025

5.0%

935K shares

FMR LLC

SC 13G/A · May 12, 2025

15.0%

2.8M shares

Timothy A. Springer

SC 13D/A · Apr 7, 2025

31.5%

4.3M shares

Terrance McGuire

SC 13D/A · Apr 7, 2025

6.3%

658K shares

BML Investment Partners, L.P.

SC 13G/A · Feb 13, 2025

0.0%

0 shares

Deep Track Capital, LP

SC 13G · Feb 10, 2025

7.6%

1.4M shares

Timothy A. Springer

SC 13D/A · Feb 10, 2025

29.2%

4.2M shares

Terrance McGuire

SC 13D/A · Feb 7, 2025

6.3%

1.2M shares

FMR LLC

SC 13G/A · Jan 8, 2025

10.3%

1.5M shares

Newtyn Management, LLC

SC 13G/A · Nov 14, 2024

0.0%

0 shares

ATLAS VENTURE FUND X, L.P.

SC 13D/A · Oct 28, 2024

0.1%

9K shares

Timothy A. Springer

SC 13D/A · Oct 24, 2024

31.2%

4.6M shares

Timothy A. Springer

SC 13D/A · Sep 27, 2024

29.1%

4.3M shares

FMR LLC

SC 13G/A · Jul 22, 2024

7.3%

1.1M shares

FMR LLC

SC 13G · Jul 10, 2024

13.7%

2.0M shares

EcoR1 Capital, LLC

SC 13G · Jul 1, 2024

5.8%

849K shares

Vida Ventures II, LLC

SC 13D · Jun 27, 2024

6.8%

1.0M shares

Timothy A. Springer

SC 13D · Jun 26, 2024

28.8%

4.2M shares

Terrance McGuire 2

SC 13D · Jun 25, 2024

7.9%

1.2M shares

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