Cabaletta Bio, Inc.

CABA

Exchange: Nasdaq
Industry: Biological Products, (No Diagnostic Substances)
SEC CIK: 0001759138

SEC filings (opens in a new tab)

No open-market purchases or sales by Cabaletta Bio, Inc. insiders were filed in the last 90 days; 139 institutions reported holding it in 13F filings for Q2 2026, worth $490.4M in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding Cabaletta Bio, Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of CABA: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	95	1	108	+14
Shares	76.2M	4.42M	84.7M	+12.8M (+17.9%)
Value	$166.9M	$9.68M	$227.5M	+$70.3M (+44.7%)

1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (27)

Institutions that held Cabaletta Bio, Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to CABA in Q1 2026
Institution	Shares	Value	% of portfolio
Vanguard Capital Management LLC	4,028,991	$10.8M	0.00%
Cantor Fitzgerald, L. P.	765,000	$2.06M	0.07%
Vanguard Fiduciary Trust Co	570,191	$1.53M	0.00%
Diametric Capital, LP	262,831	$707.0K	0.19%
Wellington Management Group LLP	247,659	$666.2K	0.00%
D. E. Shaw & Co., Inc.	189,412	$509.5K	0.00%
Brevan Howard Capital Management LP	149,721	$402.7K	0.00%
ExodusPoint Capital Management, LP	105,985	$285.1K	0.00%
Nomura Holdings Inc	95,512	$256.9K	0.00%
Prelude Capital Management, LLC	43,416	$116.8K	0.01%
Virtu Financial LLC	38,703	$104.0K	0.00%
Vanguard Global Advisers, LLC	35,751	$96.2K	0.00%
HRT Financial LP	33,104	$89.0K	0.00%
Axq Capital, LP	28,938	$77.8K	0.01%
Catalyst Funds Management Pty Ltd	21,300	$57.3K	0.01%
GSB Wealth Management, LLC	20,000	$53.8K	0.01%
Raymond James Financial Inc	19,769	$53.2K	0.00%
Susquehanna Portfolio Strategies, LLC	17,595	$47.3K	0.00%
Jump Financial, LLC	16,700	$44.9K	0.00%
Winton Group Ltd	15,300	$41.2K	0.00%
SummitTX Capital, L.P.	12,522	$33.7K	0.00%
Kestra Advisory Services, LLC	11,750	$31.6K	0.00%
Quadrant Capital Group LLC	6,495	$17.5K	0.00%
Advisor Group Holdings, Inc.	2,907	$7.82K	0.00%
Rockefeller Capital Management L.P.	2,000	$5.38K	0.00%
Caitong International Asset Management Co., Ltd	1,322	$3.56K	0.00%
Fortitude Family Office, LLC	163	$438	0.00%

Sold out (13)

Institutions that held Cabaletta Bio, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of CABA in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Two Sigma Advisers, LP	737,900	$1.62M
Ensign Peak Advisors, Inc	550,000	$1.20M
Susquehanna International Group, LLP	138,281	$302.8K
Lighthouse Investment Partners, LLC	38,880	$85.1K
Citadel Advisors LLC	33,502	$73.4K
SG Americas Securities, LLC	30,629	$67.0K
Manufacturers Life Insurance Company, The	13,011	$28.0K
HB Wealth Management, LLC	10,000	$21.9K
Canada Pension Plan Investment Board	3,500	$7.67K
Flagship Harbor Advisors, LLC	1,000	$2.19K
Truvestments Capital LLC	680	$1.49K
Optiver Holding B.V.	24	$53
Covestor Ltd	34	$0

Not filed for Q1 2026 yet (1)

Institutions that held Cabaletta Bio, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding CABA in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	4,419,458	$9.68M