Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in TECX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 2.8M | $87.1M | +0.3% | 14.926% | 0.00% |
| 2 | TCG Crossover Management, LLC | 1.2M | $37.2M | β | 6.385% | 1.07% |
| 3 | abrdn plc | 1.1M | $35.3M | 0.0% | 6.051% | 0.06% |
| 4 | BlackRock, Inc. | 860K | $26.6M | +0.7% | 4.560% | 0.00% |
| 5 | BRAIDWELL LP | 847K | $26.2M | -8.7% | 4.490% | 0.87% |
| 6 | First Light Asset Management, LLC | 648K | $20.0M | β | 3.433% | 1.79% |
| 7 | BAKER BROS. ADVISORS LP | 608K | $18.8M | -32.7% | 3.221% | 0.11% |
| 8 | 5AM Venture Management, LLC | 607K | $18.8M | 0.0% | 3.215% | 5.21% |
| 9 | VANGUARD CAPITAL MANAGEMENT LLC | 474K | $14.6M | β | 2.510% | 0.00% |
| 10 | Vestal Point Capital, LP | 328K | $10.1M | 0.0% | 1.738% | 0.28% |
| 11 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 293K | $9.1M | +22.8% | 1.555% | 0.00% |
| 12 | KENNEDY CAPITAL MANAGEMENT, INC. | 287K | $8.9M | +37.0% | 1.519% | 0.19% |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 268K | $8.3M | +1.8% | 1.422% | 0.00% |
| 14 | MARSHALL WACE, LLP | 230K | $7.1M | +642.6% | 1.217% | 0.01% |
| 15 | ORBIMED ADVISORS LLC | 227K | $7.0M | -60.6% | 1.201% | 0.15% |
| 16 | STATE STREET CORP | 214K | $6.6M | +2.1% | 1.131% | 0.00% |
| 17 | Squarepoint Ops LLC | 164K | $5.1M | -17.6% | 0.871% | 0.01% |
| 18 | Ikarian Capital, LLC | 158K | $4.9M | β | 0.835% | 0.52% |
| 19 | AMERIPRISE FINANCIAL INC | 143K | $4.4M | β | 0.760% | 0.00% |
| 20 | Opaleye Management Inc. | 123K | $3.8M | -42.7% | 0.652% | 0.50% |
| 21 | Soleus Capital Management, L.P. | 122K | $3.8M | β | 0.645% | 0.15% |
| 22 | D. E. Shaw & Co., Inc. | 116K | $3.6M | -3.4% | 0.615% | 0.00% |
| 23 | WELLS FARGO & COMPANY/MN | 113K | $3.5M | -6.4% | 0.597% | 0.00% |
| 24 | Woodline Partners LP | 100K | $3.1M | -50.0% | 0.530% | 0.01% |
| 25 | ExodusPoint Capital Management, LP | 84K | $2.6M | -24.7% | 0.443% | 0.02% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in TECX β a direct measure of their conviction.
Filings activity in TECX during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new TECX position in Q1 2026
Institutions that fully closed their TECX position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 109 | +3.8% | 73.42% | +23.76 pp | $420M | +48% |
| Q4 2025 | 105 | +6.1% | 49.66% | +17.25 pp | $284M | +53% |
| Q3 2025 | 99 | +21% | 32.41% | 8.50 pp | $185M | 21% |
| Q2 2025 | 82 | +6.5% | 40.91% | +7.75 pp | $234M | +23% |
| Q1 2025 | 77 | +8.5% | 33.16% | 28.78 pp | $189M | 46% |
| Q4 2024 | 71 | +34% | 61.94% | +23.95 pp | $354M | +63% |
| Q3 2024 | 53 | +36% | 37.99% | +23.00 pp | $217M | +154% |
| Q2 2024 | 39 | β | 14.99% | β | $86M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying TECX stock.
Based on Q1 2026 13F filings, institutional ownership of Tectonic Therapeutic, Inc. stands at 73.4%, held across 109 reporting institutions.
FMR LLC is the largest reported institutional holder of TECX, with approximately 2,816,494 shares worth $0.09B as of Q1 2026.
Yes β 1 widely-followed marquee investor appear among the top 25 institutional holders of TECX, including SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for TECX is 60 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
28 institutions opened new positions in TECX during Q1 2026, while 24 fully exited. 65 added to existing positions and 16 trimmed.
TECX institutional ownership rose by 23.76 percentage points quarter-over-quarter, with a net change of +4 holders.
The top 10 institutions account for 70.3% of all reported 13F value in TECX, and the top 25 account for 89.7%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Tectonic Therapeutic, Inc. (TECX) Institutional Ownership