Holders — by stockHoldings — by fund

Mass General Brigham, Inc

Everything this manager disclosed owning in US-listed stocks — its complete Form 13F portfolio · as of 2026-06-30 · filed with the SEC up to 45 days after quarter end · CIK 0001678378

$361.1M

disclosed book value

positions

54.8%

largest position share

Positions, as of 2026-06-30

top 6 of 6 · 13F covers long US-listed positions only — cash, bonds, private and foreign stakes are not disclosed · PUT/CALL tags = options positions (share-equivalents), not shares held

#	Issuer	Shares	Value	% of book
1	ACWIISHARES TR	1.3M	$197.7M	54.8%
2	KRMNKARMAN HLDGS INC	1.6M	$78.0M	21.6%
3	RVMDREVOLUTION MEDICINES INC	344,091	$64.4M	17.8%
4	TNGXTANGO THERAPEUTICS INC	354,192	$11.1M	3.1%
5	MAZEMAZE THERAPEUTICS INC	239,994	$7.2M	2%
6	MDLNMEDLINE INC	68,413	$2.7M	0.7%

Source: SEC Form 13F-HR, reporting period 2026-06-30. Values are the manager's filed June-30-style quarter-end marks, not live prices. Research, not investment advice.