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CABA

Cabaletta Bio, Inc.
$3.19 +0.20 (+6.69%) At close · Jul 2
Market Cap
$520.14M
Shares
163,054,796

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 112
Total Value: $234,163,557
Total Shares: 87,049,671
Showing 1–100 of 118 holdings by value · page 1 of 2

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 112 13F filers · Δ vs Dec 31, 2025
Top Holder
12.7%
Jun 2023 → Mar 2026 · range 8.0% – 13.8%
+0.0 pts
Top 5
51.1%
Jun 2023 → Mar 2026 · range 32.9% – 57.4%
−2.6 pts
Top 10
70.1%
Jun 2023 → Mar 2026 · range 53.4% – 73.9%
−1.0 pts
HHI
656
Jun 2023 → Mar 2026 · range 373 – 781
Broadly held−51

Quarterly Activity

vs Dec 31, 2025
New
29
Increased
34
Decreased
27
Sold Out
12
Unchanged
22
Holder count: +17
Institutional value: +37.7%
Shares held: +12.1%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega MILLENNIUM MANAGEMENT LLC +3,166,369 5,903,281
Large Qube Research & Technologies Ltd +1,603,765 1,934,990
Mega T. Rowe Price Investment Management, Inc. +1,221,748 11,080,005
Large MARSHALL WACE, LLP +1,220,742 2,179,818
Mid Cormorant Asset Management, LP +1,100,000 5,500,000

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Small SUPERSTRING CAPITAL MANAGEMENT LP −1,187,311 1,066,239
Large Schonfeld Strategic Advisors LLC −1,175,898 28,172
Mega PRICE T ROWE ASSOCIATES INC /MD/ −651,682 442,277
Mega JANE STREET GROUP, LLC −417,555 423,694
Mid 683 Capital Management, LLC −163,562 225,000

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 4,028,991 $10,837,985
Mid CANTOR FITZGERALD, L. P. 765,000 $2,057,850
Mega VANGUARD FIDUCIARY TRUST CO 570,191 $1,533,813
Small Diametric Capital, LP 262,831 $707,015
Mega WELLINGTON MANAGEMENT GROUP LLP 247,659 $666,201

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 4,419,458 $9,678,612
Large TWO SIGMA ADVISERS, LP 737,900 $1,616,001
Large Ensign Peak Advisors, Inc 550,000 $1,204,500
Mid Lighthouse Investment Partners, LLC 38,880 $85,147
Large SG Americas Securities, LLC 30,629 $67,077
Filter: New 29 Increased 34 Reduced 27 Sold out 12 Unchanged 22
Showing 100 of 118
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega T. Rowe Price Investment Management, Inc. $29,805,213 12.73% 11,080,005
Mid Bain Capital Life Sciences Investors, LLC $26,031,466 11.12% 9,677,125
Mega JENNISON ASSOCIATES LLC $24,130,854 10.31% 8,970,578
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $23,752,049 10.14% 8,829,758
Mega MILLENNIUM MANAGEMENT LLC $15,879,825 6.78% 5,903,281
Mid Cormorant Asset Management, LP $14,795,000 6.32% 5,500,000
Mega VANGUARD CAPITAL MANAGEMENT LLC $10,837,985 4.63% 4,028,991
Mega TWO SIGMA INVESTMENTS, LP $6,719,396 2.87% 2,497,917
Mega BlackRock, Inc. $6,383,375 2.73% 2,373,003
Large MARSHALL WACE, LLP $5,863,709 2.50% 2,179,818
Large RENAISSANCE TECHNOLOGIES LLC $5,478,623 2.34% 2,036,663
Large Qube Research & Technologies Ltd $5,205,123 2.22% 1,934,990
Mega MORGAN STANLEY $3,787,927 1.62% 1,408,152
Small Opaleye Management Inc. $3,712,200 1.59% 1,380,000
Large Woodline Partners LP $3,363,150 1.44% 1,250,242
Mega GEODE CAPITAL MANAGEMENT, LLC $3,048,428 1.30% 1,133,245
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,902,241 1.24% 1,078,900
Small SUPERSTRING CAPITAL MANAGEMENT LP $2,868,182 1.22% 1,066,239
Mid Ikarian Capital, LLC $2,421,000 1.03% 900,000
Mega GOLDMAN SACHS GROUP INC $2,106,861 0.90% 783,220
Mid CANTOR FITZGERALD, L. P. $2,057,850 0.88% 765,000
Mega SCHRODER INVESTMENT MANAGEMENT GROUP $2,035,353 0.87% 756,637
Mega DIMENSIONAL FUND ADVISORS LP $1,992,341 0.85% 740,648
Mid Burkehill Global Management, LP $1,883,000 0.80% 700,000
Mega UBS Group AG $1,631,925 0.70% 606,664
Mega VANGUARD FIDUCIARY TRUST CO Bank $1,533,813 0.66% 570,191
Mid GSA CAPITAL PARTNERS LLP $1,511,042 0.65% 561,726
Small KVP Capital Advisors, LP $1,359,609 0.58% 505,431
Mega CITADEL ADVISORS LLC $1,287,434 0.55% 478,600
Mega STATE STREET CORP $1,264,240 0.54% 469,978
Mid Raiffeisen Bank International AG Bank $1,210,500 0.52% 450,000
Mega PRICE T ROWE ASSOCIATES INC /MD/ $1,189,725 0.51% 442,277
Small Almitas Capital LLC $907,581 0.39% 337,391
Mega BANK OF AMERICA CORP /DE/ Bank $724,301 0.31% 269,257
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $719,230 0.31% 267,372
Small Diametric Capital, LP $707,015 0.30% 262,831
Mega JANE STREET GROUP, LLC $668,717 0.29% 248,594
Mega WELLINGTON MANAGEMENT GROUP LLP $666,201 0.28% 247,659
Large Point72 Asset Management, L.P. $663,394 0.28% 246,615
Mega GOLDMAN SACHS GROUP INC $663,085 0.28% 246,500
Mid BOOTHBAY FUND MANAGEMENT, LLC $654,867 0.28% 243,445
Mega NORTHERN TRUST CORP Bank $641,408 0.27% 238,442
Mid 683 Capital Management, LLC $605,250 0.26% 225,000
Mega Invesco Ltd. $517,510 0.22% 192,383
Mega D. E. Shaw & Co., Inc. $509,517 0.22% 189,412
Large Hudson Bay Capital Management LP $435,042 0.19% 161,726
Large TUDOR INVESTMENT CORP ET AL $403,500 0.17% 150,000
Mid Brevan Howard Capital Management LP $402,749 0.17% 149,721
Mega JANE STREET GROUP, LLC $397,582 0.17% 147,800
Large Squarepoint Ops LLC $389,191 0.17% 144,681
Mega AMERICAN CENTURY COMPANIES INC $291,378 0.12% 108,319
Large ExodusPoint Capital Management, LP $285,099 0.12% 105,985
Mid Graham Capital Management, L.P. $273,540 0.12% 101,688
Large Caption Management, LLC $269,000 0.11% 100,000
Mega BARCLAYS PLC $263,060 0.11% 97,792
Large NOMURA HOLDINGS INC $256,927 0.11% 95,512
Mid LETKO, BROSSEAU & ASSOCIATES INC $243,377 0.10% 90,475
Mid Quadrature Capital Ltd $234,191 0.10% 87,060
Mega CITADEL ADVISORS LLC $221,118 0.09% 82,200
Mega LPL Financial LLC $187,156 0.08% 69,575
Mega TD Asset Management Inc $180,025 0.08% 66,924
Small MATAURO, LLC $148,240 0.06% 55,108
Mega Bank of New York Mellon Corp Bank $146,063 0.06% 54,299
Large OMERS ADMINISTRATION Corp $145,529 0.06% 54,100
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $136,716 0.06% 50,824
Small Stonepine Capital Management, LLC $134,500 0.06% 50,000
Mid PRELUDE CAPITAL MANAGEMENT, LLC $116,789 0.05% 43,416
Mid Virtu Financial LLC $104,111 0.04% 38,703
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $100,068 0.04% 37,200
Mega Vanguard Global Advisers, LLC $96,170 0.04% 35,751
Large Jefferies Financial Group Inc. $89,958 0.04% 33,442
Large HRT FINANCIAL LP $89,049 0.04% 33,104
Small AXQ CAPITAL, LP $77,843 0.03% 28,938
Large Schonfeld Strategic Advisors LLC $75,782 0.03% 28,172
Mega CITIGROUP INC $73,902 0.03% 27,473
Mega JANE STREET GROUP, LLC $73,437 0.03% 27,300
Large MERCER GLOBAL ADVISORS INC /ADV $71,311 0.03% 26,510
Mega RAYMOND JAMES FINANCIAL INC $67,250 0.03% 25,000
Large FRED ALGER MANAGEMENT, LLC $62,292 0.03% 23,157
Small Catalyst Funds Management Pty Ltd $57,297 0.02% 21,300
Small Grey Ledge Advisors, LLC $53,800 0.02% 20,000
Mega RAYMOND JAMES FINANCIAL INC $53,178 0.02% 19,769
Mid Clear Harbor Asset Management, LLC $52,455 0.02% 19,500
Mid Vanguard Personalized Indexing Management, LLC $52,159 0.02% 19,390
Mid Private Advisor Group, LLC $48,487 0.02% 18,025
Mid Susquehanna Portfolio Strategies, LLC $47,330 0.02% 17,595
Mid Callan Family Office, LLC Family Office $46,897 0.02% 17,434
Mid China Universal Asset Management Co., Ltd. $45,953 0.02% 17,083
Mid Jump Financial, LLC $44,923 0.02% 16,700
Mid WINTON GROUP Ltd $41,157 0.02% 15,300
Small CRA Financial Services, LLC $40,350 0.02% 15,000
Mega FMR LLC $34,945 0.01% 12,991
Mid SummitTX Capital, L.P. $33,684 0.01% 12,522
Mid XTX Topco Ltd $33,657 0.01% 12,512
Large Kestra Advisory Services, LLC $31,607 0.01% 11,750
Large Balyasny Asset Management L.P. $30,004 0.01% 11,154
Small Dynamic Technology Lab Private Ltd $28,990 0.01% 10,777
Mega JPMORGAN CHASE & CO $19,383 0.01% 7,206
Mid QUADRANT CAPITAL GROUP LLC $17,471 0.01% 6,495
Mega WELLS FARGO & COMPANY/MN $16,140 0.01% 6,000
Key facts CIK 1759138 CUSIP 12674W109 Visit website Investor relations

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