Tectonic Therapeutic Inc (TECX) 13F Filings: Institutional Buyers & Sellers (Q2 2026)

TECX ranks #4076 out of 37501 tracked stocks by institutional interest, inside the more closely watched half of our coverage.

TECX is a top-conviction position for 5AM Venture Management, LLC — at 7.2% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.

The largest dollar stake in TECX belongs to FMR LLC, but the position matters far more to 5AM Venture Management, LLC, who has 7.2% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.

Fidelity has added to its TECX position for two straight quarters, increasing it by $38.7M to reach $97.3M today.

Prosight Management, LP has trimmed its TECX position for two straight quarters, cutting it by $3.5M while still holding $1.4M.

TECX is down 2.9% today, but institutions show net buying of $7.7M this quarter — a divergence between today's price move and the underlying institutional flow.

TECX reported a net loss of $74.2M in its latest fiscal year.

• Not yet profitable — net loss of $74.2M in the latest fiscal year
• Net income declined year over year, from -$58.0M to -$74.2M
• Operating cash flow was negative, using $60.1M in cash
• Current ratio of 26.63x — enough short-term assets to cover short-term liabilities
• Liabilities run 0.04x equity — within a conventional range