CABA · Cabaletta Bio, Inc. · Holdings
$2.00
-0.09 (-4.09%)
At close · Oct 6
Return incl. dividend (before tax)
Going-concern doubt
— flagged Aug 13, 2026
Substantial doubt about the company's ability to continue as a going concern.
“we have concluded that substantial doubt exists about the Company’s ability to continue as a going concern.”View the 10-Q filed Aug 13, 2026
Market Cap
$335.70M
Shares
169.55M
Volume · Oct 6
2.53M
Avg daily vol (3M)
4.86M
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.
Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
Holders: 142
Total Value: $505,726,485
Total Shares: 162,613,044
Showing 1–100
of 148 holdings by value
· page 1 of 2
Institutional Ownership Trend
26 quarters
Holder Concentration
Across 142 13F filers · Δ vs Mar 31, 2026Top Holder
12.3%
−0.4 pts
Top 5
46.8%
−4.3 pts
Top 10
64.4%
−5.7 pts
HHI
584
Broadly held−72
Quarterly Activity
vs Mar 31, 2026
New
52
Increased
54
Decreased
20
Sold Out
22
Unchanged
16
Holder count:
+30
Institutional value:
+116.0%
Shares held:
+86.8%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega JENNISON ASSOCIATES LLC | +11,063,152 | 20,033,730 | |
| Mega BlackRock, Inc. | +8,381,698 | 10,754,701 | |
| Mega T. Rowe Price Investment Management, Inc. | +7,789,902 | 18,869,907 | |
| Mid Bain Capital Life Sciences Investors, LLC | +7,564,320 | 17,241,445 | |
| Mega STATE STREET CORP | +7,369,327 | 7,839,305 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega MILLENNIUM MANAGEMENT LLC | −3,834,790 | 2,068,491 | |
| Mega TWO SIGMA INVESTMENTS, LP | −1,086,986 | 1,410,931 | |
| Mega MARSHALL WACE, LLP | −613,879 | 1,565,939 | |
| Mega Qube Research & Technologies Ltd | −508,150 | 1,426,840 | |
| Large RENAISSANCE TECHNOLOGIES LLC | −501,363 | 1,535,300 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega NORGES BANK | 4,112,401 | $12,789,567 | |
| Mega FRANKLIN RESOURCES INC | 2,413,937 | $7,507,344 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC | 1,418,108 | $4,410,315 | |
| Small SPHERA FUNDS MANAGEMENT LTD. | 1,329,012 | $4,133,227 | |
| Mega AMERIPRISE FINANCIAL INC | 828,145 | $2,575,530 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Large Point72 Asset Management, L.P. | 246,615 | $663,394 | |
| Mid 683 Capital Management, LLC | 225,000 | $605,250 | |
| Large Hudson Bay Capital Management LP | 161,726 | $435,042 | |
| Large Brevan Howard Capital Management LP | 149,721 | $402,749 | |
| Large Squarepoint Ops LLC | 144,681 | $389,191 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega JENNISON ASSOCIATES LLC | $62,304,900 | 12.32% | 20,033,730 | Shares | 2026-08-03 | |
| Mega T. Rowe Price Investment Management, Inc. | $58,685,410 | 11.60% | 18,869,907 | Shares | 2026-08-14 | |
| Mid Bain Capital Life Sciences Investors, LLC | $53,620,893 | 10.60% | 17,241,445 | Shares | 2026-08-14 | |
| Mega BlackRock, Inc. | $33,447,117 | 6.61% | 10,754,701 | Shares | 2026-08-07 | |
| Large ADAGE CAPITAL PARTNERS GP, L.L.C. | $28,533,497 | 5.64% | 9,174,758 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP | $24,380,238 | 4.82% | 7,839,305 | Shares | 2026-09-22 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $22,476,025 | 4.44% | 7,227,018 | Shares | 2026-08-13 | |
| Mid Cormorant Asset Management, LP | $15,550,000 | 3.07% | 5,000,000 | Shares | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | $13,742,076 | 2.72% | 4,418,674 | Shares | 2026-08-14 | |
| Large Woodline Partners LP | $13,062,441 | 2.58% | 4,200,142 | Shares | 2026-08-14 | |
| Mega NORGES BANK Bank | $12,789,567 | 2.53% | 4,112,401 | Shares | 2026-08-12 | |
| Mid Opaleye Management Inc. | $12,016,418 | 2.38% | 3,863,800 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC | $10,953,768 | 2.17% | 3,522,112 | Shares | 2026-09-02 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $10,758,932 | 2.13% | 3,459,464 | Shares | 2026-08-12 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $8,771,755 | 1.73% | 2,820,500 | Call | 2026-08-14 | |
| Mega FRANKLIN RESOURCES INC | $7,507,344 | 1.48% | 2,413,937 | Shares | 2026-08-13 | |
| Mega GOLDMAN SACHS GROUP INC | $6,878,775 | 1.36% | 2,211,825 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC | $6,433,007 | 1.27% | 2,068,491 | Shares | 2026-08-14 | |
| Mega MARSHALL WACE, LLP | $4,870,070 | 0.96% | 1,565,939 | Shares | 2026-08-13 | |
| Large RENAISSANCE TECHNOLOGIES LLC | $4,774,783 | 0.94% | 1,535,300 | Shares | 2026-08-13 | |
| Mega UBS Group AG | $4,577,591 | 0.91% | 1,471,895 | Shares | 2026-08-13 | |
| Mega Qube Research & Technologies Ltd | $4,437,472 | 0.88% | 1,426,840 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC | $4,410,315 | 0.87% | 1,418,108 | Shares | 2026-08-13 | |
| Mega TWO SIGMA INVESTMENTS, LP | $4,387,995 | 0.87% | 1,410,931 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY | $4,184,583 | 0.83% | 1,345,526 | Shares | 2026-08-13 | |
| Small SPHERA FUNDS MANAGEMENT LTD. | $4,133,227 | 0.82% | 1,329,012 | Shares | 2026-08-14 | |
| Small SUPERSTRING CAPITAL MANAGEMENT LP | $3,976,607 | 0.79% | 1,278,652 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $3,385,530 | 0.67% | 1,088,595 | Shares | 2026-08-13 | |
| Mega NORTHERN TRUST CORP Bank | $3,132,086 | 0.62% | 1,007,102 | Shares | 2026-08-13 | |
| Mega DIMENSIONAL FUND ADVISORS LP | $3,007,975 | 0.59% | 967,195 | Shares | 2026-08-11 | |
| Small Stonepine Capital Management, LLC | $2,852,181 | 0.56% | 917,100 | Shares | 2026-08-17 | |
| Mega SCHRODER INVESTMENT MANAGEMENT GROUP | $2,664,141 | 0.53% | 856,637 | Shares | 2026-08-13 | |
| Mega AMERIPRISE FINANCIAL INC | $2,575,530 | 0.51% | 828,145 | Shares | 2026-08-14 | |
| Mid CANTOR FITZGERALD, L. P. | $2,488,003 | 0.49% | 800,001 | Shares | 2026-08-19 | |
| Small HEIGHTS CAPITAL MANAGEMENT, INC | $2,349,996 | 0.46% | 755,626 | Shares | 2026-08-14 | |
| Small Blue Owl Capital Holdings LP | $2,222,748 | 0.44% | 714,710 | Shares | 2026-08-11 | |
| Mid Burkehill Global Management, LP | $2,177,000 | 0.43% | 700,000 | Shares | 2026-08-14 | |
| Small Ikarian Capital, LLC | $2,177,000 | 0.43% | 700,000 | Shares | 2026-08-14 | |
| Mid GSA CAPITAL PARTNERS LLP | $2,079,230 | 0.41% | 668,563 | Shares | 2026-08-06 | |
| Mega Nuveen, LLC | $2,010,132 | 0.40% | 646,345 | Shares | 2026-08-11 | |
| Large Caption Management, LLC | $1,864,445 | 0.37% | 599,500 | Call | 2026-08-14 | |
| Small KVP Capital Advisors, LP | $1,571,890 | 0.31% | 505,431 | Shares | 2026-08-13 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $1,534,205 | 0.30% | 493,314 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC | $1,529,187 | 0.30% | 491,700 | Call | 2026-09-02 | |
| Large Jump Financial, LLC | $1,520,089 | 0.30% | 488,775 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $1,341,654 | 0.27% | 431,400 | Call | 2026-08-14 | |
| Mid Raiffeisen Bank International AG Bank | $1,337,300 | 0.26% | 430,000 | Shares | 2026-08-03 | |
| Mega TD Asset Management Inc | $1,217,477 | 0.24% | 391,472 | Shares | 2026-08-04 | |
| Mid Susquehanna Portfolio Strategies, LLC | $1,192,044 | 0.24% | 383,294 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1,165,895 | 0.23% | 374,886 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $947,986 | 0.19% | 304,819 | Shares | 2026-08-06 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP | $890,118 | 0.18% | 286,212 | Shares | 2026-08-14 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | $831,526 | 0.16% | 267,372 | Shares | 2026-08-14 | |
| Mega Invesco Ltd. | $751,265 | 0.15% | 241,565 | Shares | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN | $612,270 | 0.12% | 196,872 | Shares | 2026-08-14 | |
| Mega CITIGROUP INC | $572,960 | 0.11% | 184,232 | Shares | 2026-08-03 | |
| Mid BOOTHBAY FUND MANAGEMENT, LLC | $567,435 | 0.11% | 182,455 | Shares | 2026-08-14 | |
| Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance | $566,191 | 0.11% | 182,055 | Shares | 2026-09-09 | |
| Large PANAGORA ASSET MANAGEMENT INC | $503,558 | 0.10% | 161,916 | Shares | 2026-08-06 | |
| Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | $475,718 | 0.09% | 152,964 | Shares | 2026-08-14 | |
| Large TUDOR INVESTMENT CORP ET AL | $466,500 | 0.09% | 150,000 | Call | 2026-08-14 | |
| Large Rafferty Asset Management, LLC | $454,392 | 0.09% | 146,107 | Shares | 2026-08-14 | |
| Small Diametric Capital, LP | $421,709 | 0.08% | 135,598 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS | $409,400 | 0.08% | 131,640 | Shares | 2026-08-12 | |
| Small Almitas Capital LLC | $391,549 | 0.08% | 125,900 | Shares | 2026-08-17 | |
| Mega CITADEL ADVISORS LLC | $370,090 | 0.07% | 119,000 | Put | 2026-09-02 | |
| Mega DEUTSCHE BANK AG\ Bank | $345,090 | 0.07% | 110,962 | Shares | 2026-08-07 | |
| Small Virtus Investment Advisers, LLC | $338,066 | 0.07% | 108,703 | Shares | 2026-08-11 | |
| Mega ALLIANCEBERNSTEIN L.P. | $337,155 | 0.07% | 108,410 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $281,927 | 0.06% | 90,652 | Shares | 2026-08-14 | |
| Mid LETKO, BROSSEAU & ASSOCIATES INC | $281,377 | 0.06% | 90,475 | Shares | 2026-08-13 | |
| Mid Graham Capital Management, L.P. | $252,777 | 0.05% | 81,279 | Shares | 2026-08-14 | |
| Mega LPL Financial LLC | $245,923 | 0.05% | 79,075 | Shares | 2026-08-07 | |
| Mid PROFUND ADVISORS LLC | $228,301 | 0.05% | 73,409 | Shares | 2026-08-11 | |
| Mid Virtu Financial LLC | $216,179 | 0.04% | 69,511 | Shares | 2026-08-13 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund | $213,320 | 0.04% | 68,592 | Shares | 2026-08-14 | |
| Large MetLife Investment Management, LLC | $207,589 | 0.04% | 66,749 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $196,639 | 0.04% | 63,228 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $190,954 | 0.04% | 61,400 | Put | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $187,498 | 0.04% | 60,289 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO | $184,632 | 0.04% | 59,368 | Shares | 2026-08-12 | |
| Mega Vanguard Global Advisers, LLC | $178,426 | 0.04% | 57,372 | Shares | 2026-08-13 | |
| Small MATAURO, LLC | $171,385 | 0.03% | 55,108 | Shares | 2026-07-21 | |
| Large Universal- Beteiligungs- und Servicegesellschaft mbH | $168,207 | 0.03% | 54,086 | Shares | 2026-08-06 | |
| Small EntryPoint Capital, LLC | $158,382 | 0.03% | 50,927 | Shares | 2026-08-13 | |
| Mid ADAR1 Capital Management, LLC | $155,500 | 0.03% | 50,000 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $142,438 | 0.03% | 45,800 | Put | 2026-08-14 | |
| Mid XTX Topco Ltd | $142,133 | 0.03% | 45,702 | Shares | 2026-08-14 | |
| Mega BARCLAYS PLC | $139,020 | 0.03% | 44,701 | Shares | 2026-08-14 | |
| Large KEYBANK NATIONAL ASSOCIATION/OH Bank | $121,305 | 0.02% | 39,005 | Shares | 2026-07-28 | |
| Mid Quantbot Technologies LP | $115,716 | 0.02% | 37,208 | Shares | 2026-08-12 | |
| Large LOS ANGELES CAPITAL MANAGEMENT LLC | $107,043 | 0.02% | 34,419 | Shares | 2026-08-13 | |
| Large Police & Firemen's Retirement System of New Jersey Pension | $103,261 | 0.02% | 33,203 | Shares | 2026-07-23 | |
| Small Grey Ledge Advisors, LLC | $93,300 | 0.02% | 30,000 | Shares | 2026-07-27 | |
| Mid WINTON GROUP Ltd | $83,970 | 0.02% | 27,000 | Shares | 2026-08-07 | |
| Mid TWO SIGMA SECURITIES, LLC Broker-Dealer | $82,921 | 0.02% | 26,663 | Shares | 2026-08-14 | |
| Mid China Universal Asset Management Co., Ltd. | $80,704 | 0.02% | 25,950 | Shares | 2026-07-24 | |
| Mid RITHOLTZ WEALTH MANAGEMENT | $77,750 | 0.02% | 25,000 | Shares | 2026-08-11 | |
| Mega RAYMOND JAMES FINANCIAL INC | $77,750 | 0.02% | 25,000 | Call | 2026-08-14 | |
| Large Wealthfront Advisers LLC | $75,849 | 0.01% | 24,389 | Shares | 2026-08-07 |