Mass General Brigham, Inc

CIK 0001678378 · SOMERVILLE, MA · Quarter end: 2026-06-30 · Filed on: 2026-08-07 · Open the SEC source ↗

Mass General Brigham, Inc reported 6 positions worth $361.1M as of June 30, 2026 (13F filed August 7, 2026). Largest holding: ACWI (54.8%).

Portfolio Value (AUM)Total value of the fund's US stock portfolio reported to the SEC.

$361.1M

2026 Q2

Positions

Top-10 ConcentrationHow much of the portfolio sits in the 10 largest holdings. High = concentrated bets.

100.0%

Est. Net Flow (Q)

—

2026 Q2

Positions Changes Mix History BacktestPRO

6 positions shown

#	Symbol	Company	Type	Value ↓	% Port.	Shares	1Y	YTD
▸ 1	ACWI	ISHARES TR	SH	$197.7M	54.76%	1,259,657	—	—
▸ 2	KRMN	KARMAN HLDGS INC	SH	$78.0M	21.60%	1,562,054	—	—
▸ 3	RVMD	REVOLUTION MEDICINES INC	SH	$64.4M	17.85%	344,091	—	—
▸ 4	TNGX	TANGO THERAPEUTICS INC	SH	$11.1M	3.07%	354,192	—	—
▸ 5	MAZE	MAZE THERAPEUTICS INC	SH	$7.2M	1.98%	239,994	—	—
▸ 6	MDLN	MEDLINE INC	SH	$2.7M	0.75%	68,413	—	—

Read the 2026-Q2 quarterly report · 13F Filing Calendar

Frequently Asked Questions

What stocks does Mass General Brigham, Inc hold as of Q2 2026?

Mass General Brigham, Inc reported 6 positions worth $361.1M in its Q2 2026 13F filing. Largest positions: ACWI (54.8%), KRMN (21.6%), RVMD (17.8%), TNGX (3.1%) and MAZE (2.0%).

What did Mass General Brigham, Inc buy in Q2 2026?

No previous quarter is available yet; the comparison appears with the next filing.

What did Mass General Brigham, Inc sell in Q2 2026?

No previous quarter is available yet.

13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.