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NASDAQ: TECX
Tectonic Therapeutic Inc Stock Ownership - Who owns Tectonic Therapeutic?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Tectonic Therapeutic Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Marcella K. RuddyChief Medical Officer2026-05-041,065$30.00
$31.95kSell
Marcella K. RuddyChief Medical Officer2026-04-011,000$31.05
$31.05kSell
Peter McNamaraChief Scientific Officer2026-03-06215$35.00
$7.53kSell
Marcella K. RuddyChief Medical Officer2026-03-0610,000$30.00
$300.00kSell
Peter McNamaraChief Scientific Officer2026-03-06215$14.71
$3.16kBuy
Peter McNamaraChief Scientific Officer2026-03-066,047$30.00
$181.41kSell
Peter McNamaraChief Scientific Officer2026-03-062,500$2.38
$5.95kBuy
Peter McNamaraChief Scientific Officer2026-03-041,650$25.00
$41.25kSell
Peter McNamaraChief Scientific Officer2026-03-031,649$22.06
$36.38kSell
Alise ReicinChief Executive Officer2026-02-112,500$21.10
$52.75kBuy

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Net Insider Buy/Sell (L12M) Ownership

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TECX Shareholders

What type of owners hold Tectonic Therapeutic Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Timothy A. Springer31.93%6,024,338$180.85MInsider
Bruce Booth29.50%5,567,289$167.13MInsider
Braden Michael Leonard26.00%4,905,068$147.25MInsider
Atlas Venture Fund X LP25.21%4,756,478$142.79MInsider
Clarus Lifesciences III LP23.55%4,443,487$133.39MInsider
Atlas Venture Associates X LP19.66%3,710,052$111.38MInsider
Blackstone Holdings II LP15.70%2,962,325$88.93MInsider
Scott Requadt15.70%2,962,325$88.93MInsider
Fmr LLC14.93%2,816,494$84.55MInstitution
Tcg Crossover Management LLC6.39%1,204,891$36.17MInstitution

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TECX vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TECX26.29%73.71%Net BuyingNet Selling
PROK14.45%39.09%Net Selling
PRME46.23%53.77%Net Buying
MDXG48.13%51.87%Net BuyingNet Buying
AGMB47.92%0.09%
View Top Biotech Stocks

Tectonic Therapeutic Stock Ownership FAQ

Who owns Tectonic Therapeutic?

Tectonic Therapeutic (NASDAQ: TECX) is owned by 73.20% institutional shareholders, 205.19% Tectonic Therapeutic insiders, and 0.00% retail investors. Timothy A. Springer is the largest individual Tectonic Therapeutic shareholder, owning 6.02M shares representing 31.93% of the company. Timothy A. Springer's Tectonic Therapeutic shares are currently valued at $180.85M.

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