CABALETTA BIO INC (CABA)
Institutional ownership reported to the SEC as of Q2 2026, across 27 quarters.
141
Reporting holders
$440.1M
Reported value
80.2%
Of shares outstanding
4.1%
Held as options
+31
Holder change
Institutions report 136,049,096 shares against 169,545,445 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| JENNISON ASSOCIATES LLC | $62.3M | 20,033,730 | 0.04% | 14q | +123.3%+$34.4M |
| Bain Capital Life Sciences Investors, LLC | $53.6M | 17,241,445 | 3.19% | 13q | +78.2%+$23.5M |
| BlackRock, Inc. | $33.4M | 10,754,701 | 0.00% | 8q | +353.2%+$26.1M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $28.5M | 9,174,758 | 0.04% | 27q | +3.9%+$1.1M |
| STATE STREET CORP | $24.4M | 7,839,305 | 0.00% | 27q | +1568.0%+$22.9M |
| VANGUARD CAPITAL MANAGEMENT LLC | $22.5M | 7,227,018 | 0.00% | 2q | +79.4%+$9.9M |
| Cormorant Asset Management, LP | $15.6M | 5,000,000 | 0.80% | 5q | -9.1%-$1.6M |
| Woodline Partners LP | $13.1M | 4,200,142 | 0.04% | 5q | +235.9%+$9.2M |
| CITADEL ADVISORS LLC | $12.9M | 3,522,112 | 0.00% | 23q | HELD |
| NORGES BANK | $12.8M | 4,112,401 | 0.00% | new | NEW |
| Opaleye Management Inc. | $12.0M | 3,863,800 | 1.09% | 4q | +180.0%+$7.7M |
| GEODE CAPITAL MANAGEMENT, LLC | $10.8M | 3,459,464 | 0.00% | 27q | +205.3%+$7.2M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $9.1M | 63,228 | 0.00% | 22q | HELD |
| FRANKLIN RESOURCES INC | $7.5M | 2,413,937 | 0.00% | new | NEW |
| GOLDMAN SACHS GROUP INC | $6.9M | 2,211,825 | 0.00% | 12q | +182.4%+$4.4M |
| MILLENNIUM MANAGEMENT LLC | $6.4M | 2,068,491 | 0.00% | 10q | -65.0%-$11.9M |
| Stonepine Capital Management, LLC | $5.7M | 1,834,200 | 1.46% | 3q | +3568.4%+$5.5M |
| CANTOR FITZGERALD, L. P. | $5.0M | 1,600,002 | 0.03% | 2q | +109.2%+$2.6M |
| MARSHALL WACE, LLP | $4.9M | 1,565,939 | 0.00% | 10q | -28.2%-$1.9M |
| RENAISSANCE TECHNOLOGIES LLC | $4.8M | 1,535,300 | 0.01% | 7q | -24.6%-$1.6M |
| UBS Group AG | $4.6M | 1,471,895 | 0.00% | 16q | +142.6%+$2.7M |
| Qube Research & Technologies Ltd | $4.4M | 1,426,840 | 0.00% | 4q | -26.3%-$1.6M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $4.4M | 1,418,108 | 0.00% | new | NEW |
| TWO SIGMA INVESTMENTS, LP | $4.4M | 1,410,931 | 0.00% | 25q | -43.5%-$3.4M |
| MORGAN STANLEY | $4.2M | 1,345,526 | 0.00% | 27q | -4.4%-$194.8K |
| SPHERA FUNDS MANAGEMENT LTD. | $4.1M | 1,329,012 | 0.54% | new | NEW |
| SUPERSTRING CAPITAL MANAGEMENT LP | $3.5M | 1,278,652 | 2.20% | 10q | +19.9%+$577.8K |
| VANGUARD FIDUCIARY TRUST CO | $3.4M | 1,088,595 | 0.00% | 2q | +90.9%+$1.6M |
| NORTHERN TRUST CORP | $3.1M | 1,007,102 | 0.00% | 27q | +322.4%+$2.4M |
| DIMENSIONAL FUND ADVISORS LP | $3.0M | 967,195 | 0.00% | 3q | +30.6%+$704.6K |
| SCHRODER INVESTMENT MANAGEMENT GROUP | $2.7M | 856,637 | 0.00% | 3q | +13.2%+$311.0K |
| AMERIPRISE FINANCIAL INC | $2.6M | 828,145 | 0.00% | new | NEW |
| HEIGHTS CAPITAL MANAGEMENT, INC | $2.3M | 755,626 | 0.54% | new | NEW |
| Blue Owl Capital Holdings LP | $2.2M | 714,710 | 0.33% | new | NEW |
| Ikarian Capital, LLC | $2.2M | 700,000 | 0.23% | 3q | -22.2%-$622.0K |
| Burkehill Global Management, LP | $2.2M | 700,000 | 0.08% | 5q | HELD |
| Nuveen, LLC | $2.0M | 646,345 | 0.00% | new | NEW |
| Caption Management, LLC | $1.9M | options only | 0.01% | 2q | OPTIONS |
| SIMPLEX TRADING, LLC | $1.6M | options only | 0.00% | 16q | OPTIONS |
| KVP Capital Advisors, LP | $1.6M | 505,431 | 1.15% | 3q | HELD |
| GROUP ONE TRADING LLC | $1.5M | options only | 0.00% | 7q | OPTIONS |
| BANK OF AMERICA CORP /DE/ | $1.5M | 493,314 | 0.00% | 27q | +83.2%+$696.8K |
| JANE STREET GROUP, LLC | $1.5M | options only | 0.00% | 5q | OPTIONS |
| Jump Financial, LLC | $1.5M | 488,775 | 0.01% | 2q | +2826.8%+$1.5M |
| Raiffeisen Bank International AG | $1.3M | 430,000 | 0.02% | 7q | -4.4%-$62.2K |
| TD Asset Management Inc | $1.2M | 391,472 | 0.00% | 11q | +485.0%+$1.0M |
| Susquehanna Portfolio Strategies, LLC | $1.2M | 383,294 | 0.02% | 2q | +2078.4%+$1.1M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.2M | 374,886 | 0.00% | 15q | +637.6%+$1.0M |
| Sixth Street Partners Management Company, L.P. | $1.2M | 374,886 | 0.00% | new | NEW |
| Bank of New York Mellon Corp | $948.0K | 304,819 | 0.00% | 27q | +461.4%+$779.1K |
| WELLINGTON MANAGEMENT GROUP LLP | $890.1K | 286,212 | 0.00% | 2q | +15.6%+$119.9K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $831.5K | 267,372 | 0.01% | 7q | HELD |
| Invesco Ltd. | $751.3K | 241,565 | 0.00% | 13q | +25.6%+$153.0K |
| WELLS FARGO & COMPANY/MN | $612.3K | 196,872 | 0.00% | 27q | +1540.6%+$575.0K |
| CITIGROUP INC | $573.0K | 184,232 | 0.00% | 14q | +570.6%+$487.5K |
| BOOTHBAY FUND MANAGEMENT, LLC | $567.4K | 182,455 | 0.01% | 3q | -25.1%-$189.7K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $566.2K | 182,055 | 0.00% | new | NEW |
| PANAGORA ASSET MANAGEMENT INC | $503.6K | 161,916 | 0.00% | new | NEW |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | $475.7K | 152,964 | 0.01% | new | NEW |
| TUDOR INVESTMENT CORP ET AL | $466.5K | options only | 0.00% | 2q | OPTIONS |
| Rafferty Asset Management, LLC | $454.4K | 146,107 | 0.00% | new | NEW |
| Diametric Capital, LP | $421.7K | 135,598 | 0.04% | 2q | -48.4%-$395.7K |
| RHUMBLINE ADVISERS | $409.4K | 131,640 | 0.00% | new | NEW |
| Almitas Capital LLC | $391.5K | 125,900 | 0.09% | 6q | -62.7%-$657.7K |
| DEUTSCHE BANK AG\ | $345.1K | 110,962 | 0.00% | new | NEW |
| Virtus Investment Advisers, LLC | $338.1K | 108,703 | 0.08% | new | NEW |
| ALLIANCEBERNSTEIN L.P. | $291.6K | 108,410 | 0.00% | new | NEW |
| D. E. Shaw & Co., Inc. | $281.9K | 90,652 | 0.00% | 2q | -52.1%-$307.1K |
| LETKO, BROSSEAU & ASSOCIATES INC | $281.4K | 90,475 | 0.00% | 3q | HELD |
| Graham Capital Management, L.P. | $252.8K | 81,279 | 0.00% | 3q | -20.1%-$63.5K |
| LPL Financial LLC | $245.9K | 79,075 | 0.00% | 3q | +13.7%+$29.5K |
| RAYMOND JAMES FINANCIAL INC | $237.5K | 60,289 | 0.00% | 2q | +205.0%+$159.6K |
| PROFUND ADVISORS LLC | $228.3K | 73,409 | 0.01% | new | NEW |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $213.3K | 68,592 | 0.00% | new | NEW |
| MetLife Investment Management, LLC | $207.6K | 66,749 | 0.00% | new | NEW |
| JPMORGAN CHASE & CO | $184.6K | 59,368 | 0.00% | 27q | +723.9%+$162.2K |
| Vanguard Global Advisers, LLC | $178.4K | 57,372 | 0.00% | 2q | +60.5%+$67.2K |
| MATAURO, LLC | $171.4K | 55,108 | 0.02% | 3q | HELD |
| Universal- Beteiligungs- und Servicegesellschaft mbH | $168.2K | 54,086 | 0.00% | new | NEW |
| EntryPoint Capital, LLC | $158.4K | 50,927 | 0.04% | new | NEW |
| RITHOLTZ WEALTH MANAGEMENT | $155.5K | 50,000 | 0.00% | new | NEW |
| ADAR1 Capital Management, LLC | $155.5K | 50,000 | 0.01% | new | NEW |
| XTX Topco Ltd | $142.1K | 45,702 | 0.00% | 5q | +265.3%+$103.2K |
| BARCLAYS PLC | $139.0K | 44,701 | 0.00% | 18q | -54.3%-$165.1K |
| KEYBANK NATIONAL ASSOCIATION/OH | $121.3K | 39,005 | 0.00% | new | NEW |
| Quantbot Technologies LP | $115.7K | 37,208 | 0.00% | new | NEW |
| LOS ANGELES CAPITAL MANAGEMENT LLC | $107.0K | 34,419 | 0.00% | new | NEW |
| Police & Firemen's Retirement System of New Jersey | $103.3K | 33,203 | 0.00% | new | NEW |
| Grey Ledge Advisors, LLC | $93.3K | 30,000 | 0.02% | 2q | +50.0%+$31.1K |
| WINTON GROUP Ltd | $84.0K | 27,000 | 0.00% | 2q | +76.5%+$36.4K |
| TWO SIGMA SECURITIES, LLC | $82.9K | 26,663 | 0.01% | new | NEW |
| China Universal Asset Management Co., Ltd. | $80.7K | 25,950 | 0.00% | 3q | +51.9%+$27.6K |
| Wealthfront Advisers LLC | $75.8K | 24,389 | 0.00% | new | NEW |
| NEW YORK STATE COMMON RETIREMENT FUND | $72.8K | 23,400 | 0.00% | new | NEW |
| INTECH INVESTMENT MANAGEMENT LLC | $71.6K | 23,035 | 0.00% | new | NEW |
| VOYA INVESTMENT MANAGEMENT LLC | $66.5K | 21,377 | 0.00% | new | NEW |
| E Fund Management Co., Ltd. | $64.1K | 20,601 | 0.00% | new | NEW |
| nVerses Capital, LLC | $63.1K | 20,286 | 0.10% | new | NEW |
| ProShare Advisors LLC | $62.5K | 20,086 | 0.00% | new | NEW |
| BNP PARIBAS FINANCIAL MARKETS | $61.0K | 19,609 | 0.00% | 7q | +1149.8%+$56.1K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G/A | Cormorant Asset Management, LPwith 1 co-filers | 6.0% |
| 2026-08-14 | 13G/A | Bain Capital Life Sciences Opportunities III, LP | 10.0% |
| 2026-08-14 | 13G/A | T. Rowe Price Investment Management, Inc. | 11.6% |
| 2026-08-12 | 13G/A | Adage Capital Management, L.P.with 2 co-filers | 8.4% |
| 2026-08-12 | 13G | Norges Bank | 5.4% |
| 2026-07-31 | 13G | Vanguard Capital Management | 5.1% |
| 2026-07-27 | 13G | BlackRock, Inc. | 5.9% |
| 2026-07-23 | 13G/A | Millennium Management LLCwith 2 co-filers | 1.3% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 141 | $440.1M | 136,049,096 | 52 | 45 | 23 | 4.1% |
| Q1 2026 | 110 | $204.8M | 72,629,740 | 26 | 28 | 27 | 4.8% |
| Q4 2025 | 91 | $148.8M | 65,509,852 | 28 | 31 | 17 | 3.6% |
| Q3 2025 | 73 | $144.8M | 60,273,724 | 12 | 20 | 29 | 2.6% |
| Q2 2025 | 79 | $98.0M | 63,523,798 | 25 | 19 | 23 | 1.4% |
| Q1 2025 | 87 | $43.7M | 31,036,411 | 14 | 24 | 27 | 1.6% |
| Q4 2024 | 101 | $76.5M | 33,176,673 | 19 | 36 | 23 | 1.5% |
| Q3 2024 | 110 | $208.1M | 43,784,119 | 16 | 42 | 33 | 0.7% |
| Q2 2024 | 135 | $357.5M | 47,571,145 | 16 | 49 | 46 | 0.5% |
| Q1 2024 | 149 | $864.0M | 49,287,313 | 37 | 43 | 45 | 2.7% |
| Q4 2023 | 122 | $1.1B | 46,589,187 | 33 | 36 | 29 | 1.3% |
| Q3 2023 | 95 | $623.7M | 40,854,643 | 24 | 42 | 9 | 0.3% |
| Q2 2023 | 79 | $463.5M | 35,762,986 | 25 | 28 | 14 | 0.4% |
| Q1 2023 | 65 | $178.6M | 21,497,270 | 22 | 18 | 11 | 0.4% |
| Q4 2022 | 51 | $149.2M | 16,015,743 | 20 | 8 | 14 | 0.7% |
| Q3 2022 | 47 | $7.9M | 11,933,713 | 7 | 10 | 13 | 1.9% |
| Q2 2022 | 49 | $17.8M | 16,803,742 | 4 | 9 | 17 | 0.0% |
| Q1 2022 | 58 | $37.8M | 18,183,771 | 7 | 18 | 16 | 2.5% |
| Q4 2021 | 63 | $72.0M | 18,322,617 | 16 | 19 | 15 | 3.5% |
| Q3 2021 | 60 | $213.1M | 17,375,364 | 12 | 17 | 14 | 0.9% |
| Q2 2021 | 60 | $136.1M | 15,752,906 | 12 | 19 | 15 | 0.5% |
| Q1 2021 | 68 | $181.5M | 16,228,948 | 16 | 17 | 17 | 0.8% |
| Q4 2020 | 55 | $201.8M | 16,173,418 | 6 | 16 | 18 | 0.0% |
| Q3 2020 | 54 | $177.3M | 16,353,879 | 7 | 14 | 22 | 0.0% |
| Q2 2020 | 51 | $183.2M | 16,442,959 | 15 | 24 | 4 | 0.0% |
| Q1 2020 | 41 | $117.4M | 16,081,866 | 6 | 14 | 13 | 0.0% |
| Q4 2019 | 40 | $228.8M | 16,376,232 | 38 | 0 | 0 | 0.0% |