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 75 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	$22.64M 9,677,125 shares	1.50%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2025	▾
02	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$20.66M 8,829,758 shares	0.03%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2025	▾
03	JENNISON ASSOCIATES LLC CIK 53417 · View history	$19.88M 8,497,537 shares	0.01%	+2.48M(+41.20%)Added	SEC filing ↗ Oct 30, 2025	▾
04	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$19.57M 8,362,489 shares	0.01%	+1.57M(+23.10%)Added	SEC filing ↗ Nov 14, 2025	▾
05	Cormorant Asset Management, LP CIK 1583977 · View history	$11.70M 5,000,000 shares	0.81%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2025	▾
06	VANGUARD GROUP INC CIK 102909 · View history	$9.81M 4,190,759 shares	0.00%	+740.03K(+21.40%)Added	SEC filing ↗ Nov 7, 2025	▾
07	Woodline Partners LP CIK 1784547 · View history	$5.00M 2,135,348 shares	0.02%	+916.88K(+75.20%)Added	SEC filing ↗ Nov 14, 2025	▾
08	HEIGHTS CAPITAL MANAGEMENT, INC CIK 1081698 · Amended · View history	$4.88M 2,084,202 shares	1.55%	-1.06M(-33.70%)Reduced	SEC filing ↗ Nov 18, 2025	▾
09	BlackRock, Inc. CIK 2012383 · View history	$3.79M 1,620,872 shares	0.00%	+650.27K(+67.00%)Added	SEC filing ↗ Nov 12, 2025	▾
10	SUPERSTRING CAPITAL MANAGEMENT LP CIK 1931118 · View history	$3.61M 1,544,525 shares	3.56%	+483.76K(+45.60%)Added	SEC filing ↗ Nov 14, 2025	▾
11	MORGAN STANLEY CIK 895421 · Amended · View history	$3.45M 1,474,676 shares	0.00%	+149.87K(+11.30%)Added	SEC filing ↗ May 27, 2026	▾
12	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$3.13M 1,339,423 shares	0.00%	+1.21M(+962.20%)Added	SEC filing ↗ Nov 13, 2025	▾
13	MARSHALL WACE, LLP CIK 1318757 · View history	$3.10M 1,326,043 shares	0.00%	+1.14M(+594.40%)Added	SEC filing ↗ Nov 13, 2025	▾
14	Alyeska Investment Group, L.P. CIK 1453072 · View history	$3.04M 1,300,000 shares	0.01%	-3.50M(-72.90%)Reduced	SEC filing ↗ Nov 17, 2025	▾
15	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$3.03M 1,294,949 shares	0.00%	-892.09K(-40.80%)Reduced	SEC filing ↗ Nov 14, 2025	▾
16	Schonfeld Strategic Advisors LLC CIK 1665241 · View history	$2.44M 1,044,169 shares	0.02%	-440.67K(-29.70%)Reduced	SEC filing ↗ Nov 14, 2025	▾
17	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$2.15M 920,340 shares	0.00%	+366.88K(+66.30%)Added	SEC filing ↗ Nov 12, 2025	▾
18	Opaleye Management Inc. CIK 1595855 · View history	$1.89M 808,882 shares	0.27%	+808.88KNew	SEC filing ↗ Nov 14, 2025	▾
19	CITADEL ADVISORS LLC CIK 1423053 · View history	$1.65M 705,465 shares	0.00%	-982.51K(-58.20%)Reduced	SEC filing ↗ Nov 14, 2025	▾
20	Burkehill Global Management, LP CIK 1904549 · View history	$1.64M 700,000 shares	0.09%	-1.20M(-63.20%)Reduced	SEC filing ↗ Nov 14, 2025	▾

Showing 20 / 75 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

69,213,964

Not deduplicated across managers

Disclosed value

$161.97M

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. · Q3 2025

Explore all 75 reporting institutions.

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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.