Security record · archived quarter
TECX
Tectonic Therapeutic, Inc. · Healthcare · Biotechnology
53Tracked holders
+3Δ holders
7.56MShares held
$233.65MReported value
+10New positions
−7Exits
Momentum inputs (comparable managers):
holder breadth +6.0% ·
share flow -7.2% ·
net new positions +5.7%
· formula
Ownership fragmentation: more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 57 | +6 | 7.73M | $265.79M | +9 | −3 |
| Q1 2026 | 53 | +3 | 7.56M | $233.65M | +10 | −7 |
| Q4 2025 | 50 | 0 | 8.28M | $172.63M | +1 | −1 |
| Q3 2025 | 14 | -1 | 5.97M | $93.62M | n/a | −1 |
| Q2 2025 | 12 | -1 | 5.17M | $102.64M | n/a | −1 |
| Q1 2025 | 10 | +6 | 971.81K | $17.19M | +6 | n/a |
| Q4 2024 | 4 | 0 | 181.96K | $8.40M | +1 | −1 |
| Q3 2024 | 3 | 0 | 144.81K | $4.39M | n/a | n/a |
| Q2 2024 | 3 | n/a | 134.61K | $2.22M | n/a | n/a |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 2.82M | +0.3% | $87.06M | 0.0% | ▲ Add | 4 | SEC ↗ ×3 |
| 2 | Aberdeen Group plc | 1.14M | 0.0% | $35.29M | 0.1% | Held | 2 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 860.35K | +0.7% | $26.59M | 0.0% | ▲ Add | 4 | SEC ↗ ×7 |
| 4 | Vanguard Capital Management Llc | 473.53K | n/a | $14.64M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | Geode Capital Management ✦ (passive) | 268.27K | +1.8% | $8.29M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 6 | Marshall Wace ✦ | 229.59K | +642.6% | $7.10M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 7 | State Street Global Advisors ✦ (passive) | 213.50K | +2.1% | $6.60M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 8 | Squarepoint Ops LLC | 164.42K | -17.6% | $5.08M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 9 | T. Rowe Price ✦ | 164.06K | New | $5.07M | 0.0% | New | 1 | SEC ↗ ×2 |
| 10 | Ameriprise Financial Inc | 143.43K | New | $4.43M | 0.0% | New | 1 | SEC ↗ ×2 |
| 11 | D. E. Shaw & Co. ✦ | 116.12K | -3.4% | $3.59M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 12 | Wells Fargo & Company/Mn | 112.66K | -6.4% | $3.48M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 13 | Northern Trust Corp | 78.35K | +8.4% | $2.42M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 14 | Point72 Asset Management ✦ | 68.60K | -86.1% | $2.12M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 15 | Connor, Clark & Lunn Investment… | 66.99K | -6.5% | $2.07M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 16 | Morgan Stanley ✦ | 64.85K | -31.3% | $2.00M | 0.0% | ▼ Trim | 3 | SEC ↗ ×6 |
| 17 | Raymond James Financial Inc | 64.20K | +17.6% | $1.98M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 18 | Goldman Sachs Group ✦ | 62.43K | -32.7% | $1.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 19 | Millennium Management ✦ | 58.35K | -80.6% | $1.80M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 20 | JPMorgan Chase ✦ | 58.87K | +918.7% | $1.70M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 21 | Sei Investments Co | 36.87K | +141.8% | $1.14M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 22 | UBS Group AG | 29.99K | -3.9% | $926,898 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 23 | Wellington Management ✦ | 29.24K | -21.8% | $903,808 | 0.0% | ▼ Trim | 5 | SEC ↗ ×3 |
| 24 | Charles Schwab Investment… | 29.11K | -10.3% | $899,790 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 25 | Bank of New York Mellon Corp | 24.76K | -4.2% | $765,336 | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 26 | Td Asset Management Inc | 20.40K | New | $630,564 | 0.0% | New | 1 | SEC ↗ |
| 27 | AQR Capital Management ✦ | 16.93K | New | $523,431 | 0.0% | New | 1 | SEC ↗ ×6 |
| 28 | Susquehanna International Group, Llp | 16.18K | -89.3% | $499,969 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 29 | Rhumbline Advisers | 14.03K | -1.2% | $433,569 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 30 | Manufacturers Life Insurance… | 13.93K | New | $430,545 | 0.0% | New | 1 | SEC ↗ |
| 31 | American Century Companies Inc | 12.53K | New | $387,426 | 0.0% | New | 1 | SEC ↗ |
| 32 | Creative Planning | 12.45K | New | $384,706 | 0.0% | New | 1 | SEC ↗ |
| 33 | Nuveen, LLC | 12.03K | -15.9% | $371,940 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 34 | Bank Of America Corp /De/ | 11.47K | +24.3% | $354,414 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Dimensional Fund Advisors Lp | 10.08K | 0.0% | $311,481 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 36 | Deutsche Bank Ag\ | 9.35K | +23.1% | $288,854 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 37 | Invesco Ltd. | 7.67K | New | $237,234 | 0.0% | New | 1 | SEC ↗ ×3 |
| 38 | Barclays Plc | 6.71K | -70.1% | $207,283 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 39 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 5.21K | +2.7% | $161,196 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 40 | New York State Common Retirement… | 4.60K | -8.0% | $142,186 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 41 | Bnp Paribas Financial Markets | 2.82K | -0.1% | $87,043 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 42 | Cwm, Llc | 1.83K | +292.5% | $56,534 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 43 | Simplex Trading, Llc | 1.35K | -85.2% | $41,759 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 44 | Citigroup Inc | 1.15K | +11.0% | $35,454 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 45 | Us Bancorp \De\ | 1.14K | +2970.3% | $35,114 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 46 | Legal & General Group Plc | 1.00K | -4.8% | $30,910 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 47 | Mirae Asset Global Investments Co.… | 979 | +7.7% | $30,261 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 48 | Russell Investments Group, Ltd. | 851 | -8.4% | $26,304 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 49 | California State Teachers… | 595 | -12.0% | $18,391 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 50 | UBS AM, a distinct business unit of… | 382 | +120.8% | $11,808 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 51 | Rockefeller Capital Management L.P. | 370 | New | $11,437 | 0.0% | New | 1 | SEC ↗ |
| 52 | Pnc Financial Services Group, Inc. | 26 | New | $804 | 0.0% | New | 1 | SEC ↗ |
| 53 | Zurcher Kantonalbank (Zurich… | 3 | -98.2% | $93 | 0.0% | ▼ Trim | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| T. Rowe Price | $5.07M | 0.0% |
| Ameriprise Financial Inc | $4.43M | 0.0% |
| Td Asset Management Inc | $630,564 | 0.0% |
| AQR Capital Management | $523,431 | 0.0% |
| Manufacturers Life Insurance… | $430,545 | 0.0% |
| American Century Companies Inc | $387,426 | 0.0% |
| Creative Planning | $384,706 | 0.0% |
| Invesco Ltd. | $237,234 | 0.0% |
| Rockefeller Capital… | $11,437 | 0.0% |
| Pnc Financial Services Group… | $804 | 0.0% |
Exited
| Citadel Advisors | $6.63M | was 0.0% |
| Jane Street Group, Llc | $403,036 | was 0.0% |
| Canada Pension Plan… | $131,418 | was 0.0% |
| Group One Trading Llc | $11,285 | was 0.0% |
| Royal Bank Of Canada | $10,000 | was 0.0% |
| Daiwa Securities Group Inc. | $2,000 | was 0.0% |
| Osaic Holdings, Inc. | $21 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 110 holders, 13.75M shares, $410.16M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 25
McNamara Peter
Officer · 43 sh · $1,570
Aug 12
McNamara Peter
Officer · 43 sh · $1,505
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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