WallStreetZenWallStreetZen

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

1 of 3

TECX insiders have bought more... subscribe to Premium to read more.
Net Insider Buy/Sell (L12M) Ownership

Be the first to know when TECX insiders and whales buy or sell their stock.

TECX Shareholders

What type of owners hold Tectonic Therapeutic Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Timothy A. Springer31.93%6,024,338$168.02MInsider
Bruce Booth29.50%5,567,289$155.27MInsider
Braden Michael Leonard26.00%4,905,068$136.80MInsider
Atlas Venture Fund X LP25.21%4,756,478$132.66MInsider
Clarus Lifesciences III LP23.55%4,443,487$123.93MInsider
Atlas Venture Associates X LP19.66%3,710,052$103.47MInsider
Scott Requadt15.70%2,962,325$82.62MInsider
Blackstone Holdings II LP15.70%2,962,325$82.62MInsider
Aberdeen Group PLC6.05%1,141,824$31.85MInstitution
Atlas Venture Opportunity Fund I LP4.30%810,811$22.61MInsider

1 of 3

TECX vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
TECX5.38%94.62%Net BuyingNet Selling
XOMA3.20%96.80%Net BuyingNet Buying
PRME24.03%63.48%Net Buying
MDXG28.09%71.91%Net BuyingNet Buying
RIGL13.43%86.57%Net SellingNet Buying
View Top Biotech Stocks

Tectonic Therapeutic Stock Ownership FAQ

Who owns Tectonic Therapeutic?

Tectonic Therapeutic (NASDAQ: TECX) is owned by 11.68% 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 $168.02M.

If you're new to stock investing, here's how to buy Tectonic Therapeutic stock.
©2026 WallStreetZen
Company
AboutNewsBlogStock Investing FAQPlansPrivacy PolicyTerms of ServiceCancellation & RefundsPerformanceHelp GuidesContactTwitterYouTubeNewsletter
Stock Tools
Top Performing AnalystsStock ScreenerStock ForecastTrending StocksStrong Buy StocksHighest Earnings StocksBest Dividend Paying StocksStatisticsStock Market SectorsStock Market IndustriesHow to Buy Stocks Online
Stock Ideas
Buy The DipBiggest Stock Gainers TodayBiggest Stock Losers Today52 Week High Stocks52 Week Low StocksMost Active Stocks TodayMost Undervalued StocksBest Penny Stocks to Buy NowBest Stocks Under $5Best Stocks Under $10
WallStreetZen does not provide financial advice and does not issue recommendations or offers to buy stock or sell any security.

Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.