Cabaletta Bio, Inc. - CABA

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
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