TECX · Insider trading · 13F holders · Congress trades
Tectonic Therapeutic, Inc. (TECX)
Who is buying and selling TECX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 11
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $15K
- Congress trades, 12 months
- 0
TECX at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 1 TECX insider filed 3 sales worth $15K on SEC Form 4, and no open-market purchases; 3 of the sales were pre-planned under Rule 10b5-1.
- 11 13F filers hold TECX among their 50 largest positions, worth $128.8M combined. The biggest bets by portfolio weight are 5AM Venture Management, LLC (7.2%), Sectoral Asset Management Inc (1.7%) and First Light Asset Management, LLC (1.7%). In their latest 13Fs, 1 manager opened a new position and 4 added to one.
- No member of Congress has disclosed a trade in TECX.
- TECX last closed at $20.50 on Oct 29, 2026.
TECX insider trading
Between Aug 1, 2026 and Oct 29, 2026, 1 TECX insider filed 3 sales worth $15K on SEC Form 4, and no open-market purchases; 3 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | McNamara Peter | Chief Scientific Officer | Sale10b5-1 | 536 | $23.04 | $12K | SEC |
| Aug 26, 2026 | McNamara Peter | Chief Scientific Officer | Sale10b5-1 | 43 | $36.52 | $2K | SEC |
| Aug 14, 2026 | McNamara Peter | Chief Scientific Officer | Sale10b5-1 | 43 | $35.00 | $2K | SEC |
Who owns TECX? Hedge funds and superinvestors
11 13F filers hold TECX among their 50 largest positions, worth $128.8M combined. The biggest bets by portfolio weight are 5AM Venture Management, LLC (7.2%), Sectoral Asset Management Inc (1.7%) and First Light Asset Management, LLC (1.7%). In their latest 13Fs, 1 manager opened a new position and 4 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| TCG Crossover Management, LLCHedge fund | 1.0% | $41.4M | 1,204,891 | +0.0% shares | Q2 2026 |
| First Light Asset Management, LLCHedge fund | 1.7% | $27.5M | 800,726 | +23.6% shares | Q2 2026 |
| 5AM Venture Management, LLCVenture capital | 7.2% | $20.9M | 606,660 | +0.0% shares | Q2 2026 |
| Vestal Point Capital, LPHedge fund | 0.3% | $14.6M | 425,000 | — | Q2 2026 |
| Bollard Group LLCWealth manager | 0.3% | $10.4M | 302,953 | +0.0% shares | Q2 2026 |
| Ikarian Capital, LLCHedge fund | 1.2% | $7.1M | 205,837 | +30.7% shares | Q2 2026 |
| Sectoral Asset Management IncHedge fund | 1.7% | $2.4M | 71,009 | +272.6% shares | Q2 2026 |
| Tetragon Partners GP LtdHedge fund | 0.3% | $1.6M | 46,516 | +23.8% shares | Q2 2026 |
| Prosight Management, LPHedge fund | 0.2% | $1.4M | 39,731 | -50.3% shares | Q2 2026 |
| Aldebaran Capital, LLCWealth manager | 0.9% | $1.3M | 36,797 | -1.0% shares | Q2 2026 |
| Velan Capital Investment Management LPHedge fund | 0.1% | $206K | 6,000 | New | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 11). Screen TECX in the grand portfolio →
TECX stock trades by members of Congress
No member of Congress has disclosed a trade in TECX.
TECX questions and answers
Are insiders buying TECX stock?
Between Aug 1, 2026 and Oct 29, 2026, 1 TECX insider filed 3 sales worth $15K on SEC Form 4, and no open-market purchases; 3 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own TECX?
11 13F filers hold TECX among their 50 largest positions, worth $128.8M combined. The biggest bets by portfolio weight are 5AM Venture Management, LLC (7.2%), Sectoral Asset Management Inc (1.7%) and First Light Asset Management, LLC (1.7%). In their latest 13Fs, 1 manager opened a new position and 4 added to one.
Has Congress traded TECX?
No member of Congress has disclosed a trade in TECX.
Who is the largest holder of TECX?
Among 13F filers, TCG Crossover Management, LLC reports the largest TECX position, $41.4M (1,204,891 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is 5AM Venture Management, LLC's: 7.2% of its portfolio.
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