Water Island Capital’s Blueprint Medicines BPMC Stock Holding History

Water Island Capital’s Portfolio BPMC Stock Details BPMC Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q3	–	Sell	-116,631	Closed	-$14.9M	–	89
2025 Q2	$14.9M	Buy	+116,631	New	+$12.1M	2.13%	15

Other funds holding BPMC

DekaBank Deutsche Girozentrale Frankfurt, Germany $60.6B AUM 23.27% 1-Year Est. Return

VanEck Associates New York $133B AUM 72.99% 1-Year Est. Return

IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

Osaic Holdings Scottsdale, Arizona $68.3B AUM 20.5% 1-Year Est. Return

HNB

Huntington National Bank Columbus, Ohio $18.1B AUM 24.69% 1-Year Est. Return

Water Island Capital's BPMC Position: Q3 2025 in Review

Water Island Capital sold out of Blueprint Medicines (BPMC) in Q3 2025, closing a stake of 116,631 shares — an estimated $14.9M sold.

Water Island Capital first reported a position in BPMC in Q2 2025 and held it in 1 quarter. The position peaked at $14.9M in Q2 2025. 5 funds tracked by Wall St. Rank hold BPMC as of Q3 2025.

Water Island Capital reported no remaining Blueprint Medicines position as of Q3 2025 after selling out during the quarter.
Water Island Capital sold 116,631 Blueprint Medicines shares in Q3 2025, an estimated $14.9M.
Water Island Capital first reported a position in Blueprint Medicines in Q2 2025 and held it in 1 quarter.
Water Island Capital's Blueprint Medicines position peaked at $14.9M in Q2 2025.
5 funds tracked by Wall St. Rank held Blueprint Medicines as of Q3 2025.

Based on Water Island Capital's 13F filing for Q3 2025, filed 14 Nov 2025.