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 95 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	T. Rowe Price Investment Management, Inc. CIK 1897612 · Amended · View history	$21.59M 9,858,257 shares	0.01%	+1.50M(+17.90%)Added	SEC filing ↗ Feb 19, 2026	▾
02	Bain Capital Life Sciences Investors, LLC CIK 1703031 · View history	$21.19M 9,677,125 shares	1.62%	0(0.00%)Unchanged	SEC filing ↗ Feb 17, 2026	▾
03	JENNISON ASSOCIATES LLC CIK 53417 · View history	$19.50M 8,905,699 shares	0.01%	+408.16K(+4.80%)Added	SEC filing ↗ Jan 30, 2026	▾
04	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$19.34M 8,829,758 shares	0.03%	0(0.00%)Unchanged	SEC filing ↗ Feb 17, 2026	▾
05	VANGUARD GROUP INC CIK 102909 · View history	$9.68M 4,419,458 shares	0.00%	+228.70K(+5.50%)Added	SEC filing ↗ Jan 29, 2026	▾
06	Cormorant Asset Management, LP CIK 1583977 · View history	$9.64M 4,400,000 shares	0.55%	-600.00K(-12.00%)Reduced	SEC filing ↗ Feb 17, 2026	▾
07	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$5.99M 2,736,912 shares	0.00%	+2.05M(+298.50%)Added	SEC filing ↗ Feb 17, 2026	▾
08	BlackRock, Inc. CIK 2012383 · View history	$5.10M 2,328,470 shares	0.00%	+707.60K(+43.70%)Added	SEC filing ↗ Feb 12, 2026	▾
09	SUPERSTRING CAPITAL MANAGEMENT LP CIK 1931118 · View history	$4.94M 2,253,550 shares	2.64%	+709.02K(+45.90%)Added	SEC filing ↗ Feb 17, 2026	▾
10	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$4.03M 1,839,799 shares	0.01%	+1.37M(+291.10%)Added	SEC filing ↗ Feb 17, 2026	▾
11	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$3.33M 1,522,583 shares	0.01%	+183.16K(+13.70%)Added	SEC filing ↗ Feb 12, 2026	▾
12	MORGAN STANLEY CIK 895421 · Amended · View history	$2.94M 1,343,708 shares	0.00%	-130.97K(-8.90%)Reduced	SEC filing ↗ May 27, 2026	▾
13	Woodline Partners LP CIK 1784547 · View history	$2.74M 1,250,242 shares	0.01%	-885.11K(-41.50%)Reduced	SEC filing ↗ Feb 17, 2026	▾
14	Schonfeld Strategic Advisors LLC CIK 1665241 · View history	$2.64M 1,204,070 shares	0.01%	+159.90K(+15.30%)Added	SEC filing ↗ Feb 17, 2026	▾
15	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$2.40M 1,093,959 shares	0.00%	-200.99K(-15.50%)Reduced	SEC filing ↗ Feb 17, 2026	▾
16	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$2.38M 1,085,816 shares	0.00%	+165.48K(+18.00%)Added	SEC filing ↗ Feb 9, 2026	▾
17	MARSHALL WACE, LLP CIK 1318757 · View history	$2.10M 959,076 shares	0.00%	-366.97K(-27.70%)Reduced	SEC filing ↗ Feb 13, 2026	▾
18	Opaleye Management Inc. CIK 1595855 · Amended · View history	$1.97M 900,000 shares	0.26%	+91.12K(+11.30%)Added	SEC filing ↗ Apr 13, 2026	▾
19	Ikarian Capital, LLC CIK 1778253 · View history	$1.97M 900,000 shares	0.26%	+900.00KNew	SEC filing ↗ Feb 18, 2026	▾
20	SCHRODER INVESTMENT MANAGEMENT GROUP CIK 1086619 · View history	$1.63M 756,637 shares	0.00%	+756.64KNew	SEC filing ↗ Feb 13, 2026	▾

Showing 20 / 95 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

76,246,846

Not deduplicated across managers

Disclosed value

$166.93M

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. · Q4 2025

Explore all 95 reporting institutions.

This page includes 20 of 95 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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Sources, coverage & how to read this data

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.