Cabaletta Bio CABA Institutional Ownership

NASDAQ CABA

$1.52 -0.02 (-1.30%)

At close: Oct 22, 2026 · 4:00 PM EDT

Institutions by Trading Activity

141 Institutions

Increased 105 74.5%

Unchanged 15 10.6%

Reduced 21 14.9%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

93.11%

▲+17.05 pp QoQ

Shares Held by Institutions

157.87Mn

of 169.55Mn outstanding

▲+86.44% QoQ

Shares Outstanding

169.55Mn

11.67Mn held outside 13F filers

Institutional Investors

141

filed 13F for Jun 2026

▲+33 vs prior quarter

Net Shares Added (QoQ)

+73.20Mn

accumulated since last quarter

Value of Holdings

$243.12Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Cabaletta Bio, Inc. (NASDAQ:CABA) was held by 141 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

These investors held 93.11% of outstanding shares in Q2 2026, up from 76.06% the quarter before.
Total holdings of CABA shares rose 86.44% from Q1 2026, and the holder count rose 67.86% from Q2 2025.
Looking at the 141 holders of CABA individually, 105 added to their positions, 21 reduced their stakes and 15 left their positions unchanged.
Institutional investors held 157.87Mn shares of Cabaletta Bio in total at the end of Q2 2026, up 73.2Mn from the prior quarter and up 88.11Mn from a year earlier.
As of June 30, 2026, the biggest holder of Cabaletta Bio was Jennison Associates LLC with 20.03Mn shares, or 11.82% of shares outstanding.
Holders that added the most shares of Cabaletta Bio in Q2 2026 were Jennison Associates LLC (+11.06Mn shares), BlackRock, Inc. (+8.38Mn shares), T. Rowe Price Investment Management, Inc. (+7.79Mn shares), Bain Capital Life Sciences Investors, LLC (+7.56Mn shares) and State Street Corp (+7.37Mn shares).
Holders that trimmed the most shares of Cabaletta Bio in Q2 2026 while keeping a position were Millennium Management LLC (-3.83Mn shares), Two Sigma Investments, LP (-1.09Mn shares), Marshall Wace, LLP (-613.88K shares), Qube Research & Technologies Ltd (-508.15K shares) and Renaissance Technologies LLC (-501.36K shares).
Per Business Quant data, the 10 largest holders of Cabaletta Bio at the end of Q2 2026 were Jennison Associates LLC (20.03Mn shares), T. Rowe Price Investment Management, Inc. (18.87Mn shares), Bain Capital Life Sciences Investors, LLC (17.24Mn shares), BlackRock, Inc. (10.75Mn shares), Adage Capital Partners GP, L.L.C. (9.17Mn shares), State Street Corp (7.84Mn shares), Vanguard Capital Management LLC (7.23Mn shares), Cormorant Asset Management, LP (5Mn shares), T. Rowe Price Associates Inc (4.42Mn shares) and Woodline Partners LP (4.2Mn shares).

Form 13F Holdings

141 Institutional Holders

Report period 30 Jun, 2026

Total shares held 157.87Mn

Of outstanding 93.11%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	JENNISON ASSOCIATES LLC	0000053417	20,033,730	11.82%	▲11,063,152	+123.33%	$62.30Mn
2	T. Rowe Price Investment Management, Inc.	0001897612	18,869,907	11.13%	▲7,789,902	+70.31%	$58.69K
3	Bain Capital Life Sciences Investors, LLC	0001703031	17,241,445	10.17%	▲7,564,320	+78.17%	$53.62Mn
4	BlackRock, Inc.	0002012383	10,754,701	6.34%	▲8,381,698	+353.21%	$33.45Mn
5	ADAGE CAPITAL PARTNERS GP, L.L.C.	0001165408	9,174,758	5.41%	▲345,000	+3.91%	$28.53Mn
6	State Street Corp	0000093751	7,839,305	4.62%	▲7,369,327	+1,568.02%	$24.38Mn
7	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	7,227,018	4.26%	▲3,198,027	+79.38%	$22.48Mn
8	Cormorant Asset Management, LP	0001583977	5,000,000	2.95%	▼500,000	-9.09%	$15.55Mn
9	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	4,418,674	2.61%	▲3,976,397	+899.07%	$13.74K
10	Woodline Partners LP	0001784547	4,200,142	2.48%	▲2,949,900	+235.95%	$13.06Mn
11	NORGES BANK	0001374170	4,112,401	2.43%	▲4,112,401	0.00%	$12.79Mn
12	Opaleye Management Inc.	0001595855	3,863,800	2.28%	▲2,483,800	+179.99%	$12.02Mn
13	CITADEL ADVISORS LLC	0001423053	3,522,112	2.08%	▲3,522,112	0.00%	$10.95Mn
14	GEODE CAPITAL MANAGEMENT, LLC	0001214717	3,459,464	2.04%	▲2,326,219	+205.27%	$10.76Mn
15	Franklin Templeton Inc	0000038777	2,413,937	1.42%	▲2,413,937	0.00%	$7.51Mn
16	Goldman Sachs Group Inc	0000886982	2,211,825	1.30%	▲1,428,605	+182.40%	$6.88Mn
17	MILLENNIUM MANAGEMENT LLC	0001273087	2,068,491	1.22%	▼3,834,790	-64.96%	$6.43Mn
18	MARSHALL WACE, LLP	0001318757	1,565,939	0.92%	▼613,879	-28.16%	$4.87Mn
19	RENAISSANCE TECHNOLOGIES LLC	0001037389	1,535,300	0.91%	▼501,363	-24.62%	$4.77Mn
20	UBS Group AG	0001610520	1,471,895	0.87%	▲865,231	+142.62%	$4.58Mn

Showing 1 to 20 of 141 holders