WELLINGTON MANAGEMENT GROUP LLP

Position in CABA — Cabaletta Bio, Inc.

CIK 902219 Boston, MA

Position in CABA

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$890,118

+$223,917 QoQ

Shares Held

286,212

+15.6% QoQ

Ownership

0.169%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#48

of 139 holders

Holding Since

Dec 2020

12 quarters on record

Voting authority Sole 0% Shared 69% None 31%

Healthcare · as of Jun 30, 2026

WELLINGTON MANAGEMENT GROUP LLP holds $14,994,233,945 across 206 Biotechnology names. CABA ranks #168 (0.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	VRTX	Vertex Pharmaceuticals Inc / Ma	3,247,658	$1,613,209,155
2	ARGX	Argenx SE	930,548	$863,334,513
3	REGN	Regeneron Pharmaceuticals, Inc.	1,270,087	$791,950,042
4	RVMD	Revolution Medicines, Inc.	3,843,415	$719,794,757
5	ALNY	Alnylam Pharmaceuticals, Inc.	2,110,407	$635,295,816
6	IONS	Ionis Pharmaceuticals Inc	7,651,415	$606,680,693
7	CYTK	Cytokinetics Inc	6,931,770	$590,517,483
8	MDGL	Madrigal Pharmaceuticals, Inc.	825,714	$443,367,129

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$890,118	286,212	+15.6%	Shares	Defined	2026-08-14
2026-03-31	$666,201	247,659	+37.5%	Shares	Defined	2026-05-15
2024-12-31	$408,956	180,157	+14.7%	Shares	Defined	2025-02-12
2024-09-30	$741,280	157,051	-1.1%	Shares	Defined	2024-11-14
2024-06-30	$1,187,890	158,809	-84.2%	Shares	Defined	2024-08-14
2024-03-31	$17,200,895	1,008,259	+86.8%	Shares	Defined	2024-05-15
2023-12-31	$12,255,184	539,876	+119.0%	Shares	Defined	2024-02-12
2023-09-30	$3,752,795	246,570	-53.9%	Shares	Defined	2023-11-14
2021-09-30	$6,501,952	534,700	0.0%	Shares	Defined	2021-11-15
2021-06-30	$4,598,420	534,700	+193.8%	Shares	Defined	2021-08-16
2021-03-31	$2,020,200	182,000	+65.9%	Shares	Defined	2021-05-17
2020-12-31	$1,369,056	109,700	—	Shares	Defined	2021-02-12
No filing history on record for this holder in this stock.