Company · Ownership research

Cabaletta Bio, Inc. CABA

CIK 0001759138 · CUSIP 12674W109

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 12674W109 (CABA), not CUSIP 12674W909 (CABA), CUSIP 12674W959 (CABA), and does not merge CUSIPs.

This page lists the top 20 of 87 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	Bain Capital Life Sciences Investors, LLC CIK 1703031 · View history	$14.71M 9,677,125 shares	1.84%	+6.92M(+250.50%)Added	SEC filing ↗ Aug 14, 2025	▾
02	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$13.42M 8,829,758 shares	0.02%	+5.20M(+142.90%)Added	SEC filing ↗ Aug 14, 2025	▾
03	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$10.33M 6,793,788 shares	0.01%	+2.82M(+71.10%)Added	SEC filing ↗ Aug 14, 2025	▾
04	JENNISON ASSOCIATES LLC CIK 53417 · View history	$9.15M 6,020,167 shares	0.01%	+3.59M(+147.40%)Added	SEC filing ↗ Aug 1, 2025	▾
05	Cormorant Asset Management, LP CIK 1583977 · View history	$7.60M 5,000,000 shares	0.57%	+5.00MNew	SEC filing ↗ Aug 14, 2025	▾
06	Alyeska Investment Group, L.P. CIK 1453072 · View history	$7.30M 4,800,000 shares	0.03%	+4.80MNew	SEC filing ↗ Aug 14, 2025	▾
07	VANGUARD GROUP INC CIK 102909 · View history	$5.25M 3,450,727 shares	0.00%	+606.49K(+21.30%)Added	SEC filing ↗ Aug 11, 2025	▾
08	HEIGHTS CAPITAL MANAGEMENT, INC CIK 1081698 · View history	$4.78M 3,144,106 shares	1.50%	+3.14MNew	SEC filing ↗ Aug 14, 2025	▾
09	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$3.33M 2,187,039 shares	0.00%	+1.70M(+347.00%)Added	SEC filing ↗ Aug 14, 2025	▾
10	Jefferies Financial Group Inc. CIK 96223 · View history	$3.04M 1,997,208 shares	0.05%	+2.00MNew	SEC filing ↗ Aug 12, 2025	▾
11	Burkehill Global Management, LP CIK 1904549 · View history	$2.89M 1,900,000 shares	0.21%	+1.90MNew	SEC filing ↗ Aug 14, 2025	▾
12	Anson Funds Management LP CIK 1491072 · View history	$2.77M 1,822,830 shares	0.51%	+1.82MNew	SEC filing ↗ Aug 14, 2025	▾
13	CITADEL ADVISORS LLC CIK 1423053 · View history	$2.57M 1,687,980 shares	0.00%	+1.69M(+482,180.00%)Added	SEC filing ↗ Aug 14, 2025	▾
14	Schonfeld Strategic Advisors LLC CIK 1665241 · View history	$2.26M 1,484,836 shares	0.02%	-177.56K(-10.70%)Reduced	SEC filing ↗ Aug 14, 2025	▾
15	MORGAN STANLEY CIK 895421 · View history	$2.01M 1,324,806 shares	0.00%	-384.08K(-22.50%)Reduced	SEC filing ↗ Aug 14, 2025	▾
16	Woodline Partners LP CIK 1784547 · View history	$1.85M 1,218,464 shares	0.01%	+1.22MNew	SEC filing ↗ Aug 14, 2025	▾
17	Blue Owl Capital Holdings LP CIK 1858703 · View history	$1.71M 1,125,000 shares	0.55%	+1.13MNew	SEC filing ↗ Aug 11, 2025	▾
18	SUPERSTRING CAPITAL MANAGEMENT LP CIK 1931118 · View history	$1.61M 1,060,764 shares	2.01%	+601.79K(+131.10%)Added	SEC filing ↗ Aug 14, 2025	▾
19	BlackRock, Inc. CIK 2012383 · View history	$1.48M 970,601 shares	0.00%	-2.48M(-71.90%)Reduced	SEC filing ↗ Aug 12, 2025	▾
20	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$1.30M 855,330 shares	0.00%	+686.43K(+406.40%)Added	SEC filing ↗ Aug 14, 2025	▾

Showing 20 / 87 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

72,765,230

Not deduplicated across managers

Disclosed value

$110.68M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Cabaletta Bio, Inc. · Q2 2025

Explore all 87 reporting institutions.

This page includes 20 of 87 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.