Cabaletta Bio, Inc. - CABA
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | History | Added to | 11,080,005 | 29,806 | 0.02% | 0.01% | 1 | +7,075,959 | 176.72% | Q1 2026 | May 15, 2026 |
| Bain Capital Life Sciences Investors, LLC | History | No change | 9,677,125 | 26,031 | 2.35% | 1.62% | 2 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| JENNISON ASSOCIATES LLC | History | Added to | 8,970,578 | 24,130 | 0.02% | 0.01% | 3 | +64,879 | 0.73% | Q1 2026 | May 06, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | History | No change | 8,829,758 | 23,752 | 0.04% | 0.03% | 4 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Added to | 5,903,281 | 15,879 | 0.01% | 0.0% | 5 | +3,166,369 | 115.69% | Q1 2026 | May 15, 2026 |
| Cormorant Asset Management, LP | History | Added to | 5,500,000 | 14,795 | 0.74% | 0.45% | 6 | +1,100,000 | 25.0% | Q1 2026 | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | New | 4,028,991 | 10,837 | 0.0% | — | 7 | +4,028,991 | New | Q1 2026 | May 15, 2026 |
| VANGUARD GROUP INC | History | No change | 4,419,458 | 9,678 | 0.0% | 0.0% | 8 | 0 | 0.0% | Q4 2025 | Jan 29, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Added to | 2,497,917 | 6,719 | 0.01% | 0.01% | 9 | +658,118 | 35.77% | Q1 2026 | May 15, 2026 |
| BlackRock, Inc. | History | Added to | 2,373,003 | 6,383 | 0.0% | 0.0% | 10 | +44,533 | 1.91% | Q1 2026 | May 13, 2026 |
| MARSHALL WACE, LLP | History | Added to | 2,179,818 | 5,863 | 0.01% | 0.0% | 11 | +1,220,742 | 127.28% | Q1 2026 | May 14, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 2,036,663 | 5,478 | 0.01% | 0.01% | 12 | +514,080 | 33.76% | Q1 2026 | May 14, 2026 |
| Qube Research & Technologies Ltd | History | Added to | 1,934,990 | 5,205 | 0.01% | 0.0% | 13 | +1,603,765 | 484.19% | Q1 2026 | May 15, 2026 |
| MORGAN STANLEY | History | Added to | 1,408,152 | 3,787 | 0.0% | 0.0% | 14 | +64,444 | 4.8% | Q1 2026 | May 15, 2026 |
| Opaleye Management Inc. | History | Added to | 1,380,000 | 3,712 | 0.49% | 0.26% | 15 | +480,000 | 53.33% | Q1 2026 | May 15, 2026 |
| Woodline Partners LP | History | No change | 1,250,242 | 3,363 | 0.01% | 0.01% | 16 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 1,133,245 | 3,049 | 0.0% | 0.0% | 17 | +47,429 | 4.37% | Q1 2026 | May 15, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 1,116,100 | 3,002 | 0.0% | 0.0% | 18 | +208,419 | 22.96% | Q1 2026 | May 15, 2026 |
| SUPERSTRING CAPITAL MANAGEMENT LP | History | Reduced | 1,066,239 | 2,868 | 2.05% | 2.64% | 19 | -1,187,311 | -52.69% | Q1 2026 | May 14, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 1,029,720 | 2,769 | 0.0% | 0.0% | 20 | +352,546 | 52.06% | Q1 2026 | May 15, 2026 |
| Ikarian Capital, LLC | History | No change | 900,000 | 2,421 | 0.2% | 0.15% | 21 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| CANTOR FITZGERALD, L. P. | History | New | 765,000 | 2,057 | 0.03% | — | 22 | +765,000 | New | Q1 2026 | May 15, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Added to | 740,648 | 1,990 | 0.0% | 0.0% | 23 | +288,609 | 63.85% | Q1 2026 | May 07, 2026 |
| Burkehill Global Management, LP | History | No change | 700,000 | 1,883 | 0.09% | 0.1% | 24 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| SCHRODER INVESTMENT MANAGEMENT GROUP | History | No change | 756,637 | 1,868 | 0.0% | 0.0% | 25 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| UBS Group AG | History | Added to | 606,664 | 1,631 | 0.0% | 0.0% | 26 | +190,987 | 45.95% | Q1 2026 | May 05, 2026 |
| TWO SIGMA ADVISERS, LP | History | No change | 737,900 | 1,616 | 0.0% | 0.0% | 27 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | New | 570,191 | 1,533 | 0.0% | — | 28 | +570,191 | New | Q1 2026 | May 08, 2026 |
| GSA CAPITAL PARTNERS LLP | History | Added to | 561,726 | 1,511 | 0.09% | 0.06% | 29 | +257,734 | 84.78% | Q1 2026 | May 08, 2026 |
| CITADEL ADVISORS LLC | History | Added to | 560,800 | 1,508 | 0.0% | 0.0% | 30 | +304,698 | 118.98% | Q1 2026 | May 15, 2026 |
| KVP Capital Advisors, LP | History | No change | 505,431 | 1,359 | 1.01% | 1.07% | 31 | 0 | 0.0% | Q1 2026 | May 13, 2026 |
| STATE STREET CORP | History | Added to | 469,978 | 1,264 | 0.0% | 0.0% | 32 | +44,500 | 10.46% | Q1 2026 | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | History | Reduced | 442,277 | 1,191 | 0.0% | 0.0% | 33 | -651,682 | -59.57% | Q1 2026 | May 15, 2026 |
| JANE STREET GROUP, LLC | History | Reduced | 423,694 | 1,139 | 0.0% | 0.0% | 34 | -417,555 | -49.64% | Q1 2026 | May 12, 2026 |
| Raiffeisen Bank International AG | History | No change | 450,000 | 1,111 | 0.02% | 0.01% | 35 | 0 | 0.0% | Q1 2026 | Apr 24, 2026 |
| Almitas Capital LLC | History | Reduced | 337,391 | 907 | 0.2% | 0.19% | 36 | -50,100 | -12.93% | Q1 2026 | May 15, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 269,257 | 724 | 0.0% | 0.0% | 37 | +254,865 | 1770.88% | Q1 2026 | May 15, 2026 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | History | Added to | 267,372 | 719 | 0.01% | 0.01% | 38 | +136,697 | 104.61% | Q1 2026 | May 15, 2026 |
| Diametric Capital, LP | History | New | 262,831 | 707 | 0.18% | — | 39 | +262,831 | New | Q1 2026 | May 15, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | History | New | 247,659 | 666 | 0.0% | — | 40 | +247,659 | New | Q1 2026 | May 15, 2026 |
| Point72 Asset Management, L.P. | History | Added to | 246,615 | 663 | 0.0% | 0.0% | 41 | +189,967 | 335.35% | Q1 2026 | May 15, 2026 |
| BOOTHBAY FUND MANAGEMENT, LLC | History | No change | 243,445 | 654 | 0.01% | 0.01% | 42 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| NORTHERN TRUST CORP | History | No change | 238,442 | 641 | 0.0% | 0.0% | 43 | 0 | 0.0% | Q1 2026 | May 14, 2026 |
| 683 Capital Management, LLC | History | Reduced | 225,000 | 605 | 0.03% | 0.04% | 44 | -163,562 | -42.09% | Q1 2026 | May 15, 2026 |
| Invesco Ltd. | History | Added to | 192,383 | 517 | 0.0% | 0.0% | 45 | +3,188 | 1.69% | Q1 2026 | May 12, 2026 |
| D. E. Shaw & Co., Inc. | History | New | 189,412 | 509 | 0.0% | — | 46 | +189,412 | New | Q1 2026 | May 15, 2026 |
| Hudson Bay Capital Management LP | History | Added to | 161,726 | 435 | 0.0% | 0.0% | 47 | +22,997 | 16.58% | Q1 2026 | May 13, 2026 |
| TUDOR INVESTMENT CORP ET AL | History | New | 150,000 | 403 | 0.0% | — | 48 | +150,000 | New | Q1 2026 | May 15, 2026 |
| Brevan Howard Capital Management LP | History | New | 149,721 | 402 | 0.0% | — | 49 | +149,721 | New | Q1 2026 | May 15, 2026 |
| Squarepoint Ops LLC | History | Reduced | 144,681 | 389 | 0.0% | 0.0% | 50 | -4,413 | -2.96% | Q1 2026 | May 15, 2026 |
| AMERICAN CENTURY COMPANIES INC | History | Added to | 108,319 | 291 | 0.0% | 0.0% | 51 | +49,542 | 84.29% | Q1 2026 | May 15, 2026 |
| ExodusPoint Capital Management, LP | History | New | 105,985 | 285 | 0.0% | — | 52 | +105,985 | New | Q1 2026 | May 14, 2026 |
| Graham Capital Management, L.P. | History | Reduced | 101,688 | 273 | 0.01% | 0.01% | 53 | -49,763 | -32.86% | Q1 2026 | May 15, 2026 |
| Caption Management, LLC | History | New | 100,000 | 269 | 0.0% | — | 54 | +100,000 | New | Q1 2026 | May 15, 2026 |
| BARCLAYS PLC | History | Reduced | 97,792 | 263 | 0.0% | 0.0% | 55 | -122,904 | -55.69% | Q1 2026 | May 14, 2026 |
| NOMURA HOLDINGS INC | History | New | 95,512 | 256 | 0.0% | — | 56 | +95,512 | New | Q1 2026 | May 15, 2026 |
| LETKO, BROSSEAU & ASSOCIATES INC | History | No change | 90,475 | 243 | 0.0% | 0.0% | 57 | 0 | 0.0% | Q1 2026 | May 12, 2026 |
| Quadrature Capital Ltd | History | Added to | 87,060 | 234 | 0.0% | 0.0% | 58 | +20,683 | 31.16% | Q1 2026 | May 15, 2026 |
| LPL Financial LLC | History | Added to | 69,575 | 187 | 0.0% | 0.0% | 59 | +26,960 | 63.26% | Q1 2026 | May 06, 2026 |
| TD ASSET MANAGEMENT INC | History | Reduced | 66,924 | 180 | 0.0% | 0.0% | 60 | -21,676 | -24.47% | Q1 2026 | May 11, 2026 |
| MATAURO, LLC | History | No change | 55,108 | 148 | 0.02% | 0.02% | 61 | 0 | 0.0% | Q1 2026 | Apr 22, 2026 |
| Bank of New York Mellon Corp | History | Added to | 54,299 | 146 | 0.0% | 0.0% | 62 | +252 | 0.47% | Q1 2026 | May 05, 2026 |
| OMERS ADMINISTRATION Corp | History | Reduced | 54,100 | 145 | 0.0% | 0.0% | 63 | -41,300 | -43.29% | Q1 2026 | May 15, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | No change | 50,824 | 136 | 0.0% | 0.0% | 64 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| Stonepine Capital Management, LLC | History | Reduced | 50,000 | 134 | 0.05% | 0.27% | 65 | -121,100 | -70.78% | Q1 2026 | May 14, 2026 |
| PRELUDE CAPITAL MANAGEMENT, LLC | History | New | 43,416 | 116 | 0.01% | — | 66 | +43,416 | New | Q1 2026 | May 15, 2026 |
| Virtu Financial LLC | History | New | 38,703 | 104 | 0.0% | — | 67 | +38,703 | New | Q1 2026 | May 14, 2026 |
| RAYMOND JAMES FINANCIAL INC | History | New | 44,769 | 103 | 0.0% | — | 68 | +44,769 | New | Q1 2026 | May 14, 2026 |
| Vanguard Global Advisers, LLC | History | New | 35,751 | 96 | 0.0% | — | 69 | +35,751 | New | Q1 2026 | May 08, 2026 |
| HRT FINANCIAL LP | History | New | 33,104 | 89 | 0.0% | — | 71 | +33,104 | New | Q1 2026 | May 14, 2026 |
| Jefferies Financial Group Inc. | History | Reduced | 33,442 | 89 | 0.0% | 0.0% | 70 | -11,683 | -25.89% | Q1 2026 | May 07, 2026 |
| AXQ CAPITAL, LP | History | New | 28,938 | 77 | 0.01% | — | 72 | +28,938 | New | Q1 2026 | May 13, 2026 |
| Schonfeld Strategic Advisors LLC | History | Reduced | 28,172 | 75 | 0.0% | 0.01% | 73 | -1,175,898 | -97.66% | Q1 2026 | May 15, 2026 |
| CITIGROUP INC | History | Reduced | 27,473 | 73 | 0.0% | 0.0% | 74 | -46,301 | -62.76% | Q1 2026 | May 11, 2026 |
| MERCER GLOBAL ADVISORS INC /ADV | History | No change | 26,510 | 71 | 0.0% | 0.0% | 75 | 0 | 0.0% | Q1 2026 | May 15, 2026 |
| FRED ALGER MANAGEMENT, LLC | History | Reduced | 23,157 | 62 | 0.0% | 0.0% | 76 | -4,864 | -17.36% | Q1 2026 | May 15, 2026 |
| Catalyst Funds Management Pty Ltd | History | New | 21,300 | 57 | 0.01% | — | 77 | +21,300 | New | Q1 2026 | May 11, 2026 |
| Grey Ledge Advisors, LLC | History | New | 20,000 | 53 | 0.01% | — | 78 | +20,000 | New | Q1 2026 | Apr 20, 2026 |
| Vanguard Personalized Indexing Management, LLC | History | Reduced | 19,390 | 52 | 0.0% | 0.0% | 80 | -2,994 | -13.38% | Q1 2026 | May 14, 2026 |
| Clear Harbor Asset Management, LLC | History | No change | 19,500 | 52 | 0.0% | 0.0% | 79 | 0 | 0.0% | Q1 2026 | May 05, 2026 |
| Private Advisor Group, LLC | History | Added to | 18,025 | 48 | 0.0% | 0.0% | 81 | +3,300 | 22.41% | Q1 2026 | Apr 24, 2026 |
| Susquehanna Portfolio Strategies, LLC | History | New | 17,595 | 47 | 0.0% | — | 82 | +17,595 | New | Q1 2026 | May 15, 2026 |
| Callan Family Office, LLC | History | Reduced | 17,434 | 46 | 0.0% | 0.0% | 83 | -5,141 | -22.77% | Q1 2026 | May 13, 2026 |
| China Universal Asset Management Co., Ltd. | History | Added to | 17,083 | 45 | 0.0% | 0.0% | 84 | +1,397 | 8.91% | Q1 2026 | Apr 27, 2026 |
| Jump Financial, LLC | History | New | 16,700 | 44 | 0.0% | — | 85 | +16,700 | New | Q1 2026 | May 14, 2026 |
| WINTON GROUP Ltd | History | New | 15,300 | 41 | 0.0% | — | 86 | +15,300 | New | Q1 2026 | May 12, 2026 |
| CRA Financial Services, LLC | History | No change | 15,000 | 40 | 0.01% | 0.0% | 87 | 0 | 0.0% | Q1 2026 | Apr 09, 2026 |
| FMR LLC | History | Reduced | 12,991 | 34 | 0.0% | 0.0% | 88 | -54 | -0.41% | Q1 2026 | May 15, 2026 |
| XTX Topco Ltd | History | Reduced | 12,512 | 33 | 0.0% | 0.01% | 89 | -142,875 | -91.95% | Q1 2026 | May 15, 2026 |
| SummitTX Capital, L.P. | History | New | 12,522 | 33 | 0.0% | — | 90 | +12,522 | New | Q1 2026 | May 15, 2026 |
| Kestra Advisory Services, LLC | History | New | 11,750 | 31 | 0.0% | — | 91 | +11,750 | New | Q1 2026 | Apr 30, 2026 |
| BALYASNY ASSET MANAGEMENT L.P. | History | Reduced | 11,154 | 30 | 0.0% | 0.0% | 92 | -40,398 | -78.36% | Q1 2026 | May 15, 2026 |
| Dynamic Technology Lab Private Ltd | History | Reduced | 10,777 | 28 | 0.0% | 0.03% | 93 | -56,012 | -83.86% | Q1 2026 | May 15, 2026 |
| QUADRANT CAPITAL GROUP LLC | History | New | 6,495 | 17 | 0.0% | — | 95 | +6,495 | New | Q1 2026 | May 13, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 7,206 | 17 | 0.0% | 0.0% | 94 | -2,599 | -26.51% | Q1 2026 | May 13, 2026 |
| WELLS FARGO & COMPANY/MN | History | Added to | 6,000 | 16 | 0.0% | 0.0% | 96 | +4,000 | 200.0% | Q1 2026 | May 11, 2026 |
| Tower Research Capital LLC (TRC) | History | Reduced | 5,784 | 15 | 0.0% | 0.0% | 97 | -24,561 | -80.94% | Q1 2026 | May 15, 2026 |
| ANTIPODES PARTNERS Ltd | History | Reduced | 5,616 | 15 | 0.0% | 0.0% | 98 | -11,571 | -67.32% | Q1 2026 | May 05, 2026 |
| Mirae Asset Global Investments Co., Ltd. | History | Added to | 5,021 | 13 | 0.0% | 0.0% | 99 | +343 | 7.33% | Q1 2026 | May 04, 2026 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | No change | 4,600 | 12 | 0.0% | 0.0% | 100 | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| OSAIC HOLDINGS, INC. | History | New | 2,907 | 7 | 0.0% | — | 101 | +2,907 | New | Q1 2026 | May 15, 2026 |
| Rockefeller Capital Management L.P. | History | New | 2,000 | 5 | 0.0% | — | 103 | +2,000 | New | Q1 2026 | May 14, 2026 |
| GF FUND MANAGEMENT CO. LTD. | History | Added to | 2,149 | 5 | 0.0% | 0.0% | 102 | +258 | 13.64% | Q1 2026 | Apr 15, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Reduced | 1,569 | 4 | 0.0% | 0.0% | 104 | -71 | -4.33% | Q1 2026 | May 12, 2026 |
| Caitong International Asset Management Co., Ltd | History | New | 1,322 | 3 | 0.0% | — | 105 | +1,322 | New | Q1 2026 | May 11, 2026 |
| ROYAL BANK OF CANADA | History | Added to | 781 | 2 | 0.0% | — | 107 | +658 | 534.96% | Q1 2026 | May 15, 2026 |
| NISA INVESTMENT ADVISORS, LLC | History | No change | 811 | 2 | 0.0% | 0.0% | 106 | 0 | 0.0% | Q1 2026 | Apr 30, 2026 |
| Russell Investments Group, Ltd. | History | No change | 939 | 2 | 0.0% | 0.0% | 108 | 0 | 0.0% | Q1 2026 | May 08, 2026 |
| JONES FINANCIAL COMPANIES LLLP | History | Reduced | 653 | 1 | 0.0% | 0.0% | 109 | -20,007 | -96.84% | Q1 2026 | May 15, 2026 |
| Ensign Peak Advisors, Inc | History | Closed out | 0 | 0 | — | 0.0% | — | -550,000 | -100.0% | Q1 2026 | May 13, 2026 |
| Lighthouse Investment Partners, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -38,880 | -100.0% | Q1 2026 | May 14, 2026 |
| SG Americas Securities, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -30,629 | -100.0% | Q1 2026 | Apr 16, 2026 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | History | Closed out | 0 | 0 | — | 0.0% | — | -13,011 | -100.0% | Q1 2026 | May 15, 2026 |
| HB Wealth Management, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -10,000 | -100.0% | Q1 2026 | Apr 27, 2026 |
| CANADA PENSION PLAN INVESTMENT BOARD | History | Closed out | 0 | 0 | — | 0.0% | — | -3,500 | -100.0% | Q1 2026 | May 15, 2026 |
| FLAGSHIP HARBOR ADVISORS, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -1,000 | -100.0% | Q1 2026 | Apr 28, 2026 |
| Truvestments Capital LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -680 | -100.0% | Q1 2026 | May 13, 2026 |
| Fortitude Family Office, LLC | History | New | 163 | 0 | — | — | — | +163 | New | Q1 2026 | Apr 15, 2026 |
| Covestor Ltd | History | Closed out | 0 | 0 | — | — | — | -34 | -100.0% | Q1 2026 | May 05, 2026 |
| Optiver Holding B.V. | History | Closed out | 0 | 0 | — | — | — | -24 | -100.0% | Q1 2026 | Jun 02, 2026 |
| Arax Advisory Partners | History | Reduced | 2 | 0 | — | — | — | -8 | -80.0% | Q1 2026 | May 13, 2026 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | History | No change | 60 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 07, 2026 |
| SBI Securities Co., Ltd. | History | No change | 316 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | Apr 27, 2026 |
| Federation des caisses Desjardins du Quebec | History | No change | 340 | 0 | — | — | — | 0 | 0.0% | Q1 2026 | May 13, 2026 |