Security record · archived quarter
CABA
Cabaletta Bio, Inc. · Healthcare · Biotechnology
13Tracked holders
0Δ holders
19.37MShares held
$29.44MReported value
+0New positions
−0Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow +30.0% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 67 | +17 | 94.18M | $292.87M | +24 | −6 |
| Q1 2026 | 49 | +1 | 47.68M | $128.08M | +7 | −6 |
| Q4 2025 | 47 | +1 | 39.89M | $87.37M | +1 | — |
| Q3 2025 | 15 | -1 | 24.60M | $57.56M | — | −1 |
| Q2 2025 | 13 | 0 | 19.37M | $29.44M | — | — |
| Q1 2025 | 10 | -1 | 6.81M | $9.44M | +2 | −3 |
| Q4 2024 | 11 | 0 | 9.36M | $21.24M | +1 | −1 |
| Q3 2024 | 10 | +2 | 7.88M | $37.20M | +2 | — |
| Q2 2024 | 8 | — | 6.49M | $48.56M | — | — |
Who holds it · Q2 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Adage Capital Partners ✦ | 8.83M | +142.9% | $13.42M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 2 | The Vanguard Group ✦ (passive) | 3.45M | — | $5.25M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | The Vanguard Group ✦ (passive) | 3.45M | — | $5.25M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | T. Rowe Price ✦ | 2.19M | +346.9% | $3.33M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 5 | T. Rowe Price ✦ | 2.19M | +346.9% | $3.33M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 6 | Citadel Advisors ✦ | 1.69M | +482180.0% | $2.57M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 7 | Citadel Advisors ✦ | 1.69M | +482180.0% | $2.57M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 970.60K | — | $1.48M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 970.60K | — | $1.48M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 970.60K | — | $1.48M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 970.60K | — | $1.48M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 970.60K | — | $1.48M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | Millennium Management ✦ | 855.33K | +406.4% | $1.30M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 14 | Geode Capital Management ✦ (passive) | 553.46K | -51.5% | $841,554 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 15 | Geode Capital Management ✦ (passive) | 553.46K | -51.5% | $841,554 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 16 | Two Sigma Investments ✦ | 252.36K | -21.5% | $383,583 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 17 | State Street Global Advisors ✦ (passive) | 217.97K | -76.8% | $331,310 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 18 | Marshall Wace ✦ | 190.96K | +470.7% | $290,255 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 19 | Marshall Wace ✦ | 190.96K | +470.7% | $290,255 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 20 | Renaissance Technologies ✦ | 126.10K | +1056.9% | $191,672 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 21 | AQR Capital Management ✦ | 32.13K | -56.6% | $48,836 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 22 | AQR Capital Management ✦ | 32.13K | -56.6% | $48,836 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 23 | AQR Capital Management ✦ | 32.13K | -56.6% | $48,836 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 24 | AQR Capital Management ✦ | 32.13K | -56.6% | $48,836 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 25 | Fidelity (FMR) ✦ | 15.46K | — | $23,493 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 107 holders, 84.67M shares, $194.86M 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.
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: Q2 2025 ·
Methodology ·
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