Question 1

How many shares of BPMC does WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC own?

Accepted Answer

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC previously held 0 shares of BPMC (BLUEPRINT MEDICINES CORP) before exiting the position in 2025-Q3.

Question 2

What is WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's BPMC position worth?

Accepted Answer

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's BPMC position was last reported at $0 in 2025-Q3 before the exit.

Question 3

Is WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC buying or selling BPMC?

Accepted Answer

In 2025-Q3, WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC exited their BPMC position entirely (-100.0% change in shares).

Question 4

When did WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC first buy BPMC?

Accepted Answer

Based on available 13F filings, WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC first reported a position in BPMC in 2020-Q4. They have held the position across 20 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2025-Q3 Latest	Exited	0	-100.0%	$0	0.0%	—	0
2025-Q2	Decreased	8,574	-99.4%	$1.1M	0.0%	—	0
2025-Q1	Decreased	1.4M	-26.5%	$126.5M	0.4%	—	0
2024-Q4	Increased	1.9M	+16.1%	$169.6M	0.4%	—	42
2024-Q3	Increased	1.7M	+5.1%	$154.9M	0.4%	—	38
2024-Q2	Decreased	1.6M	-6.7%	$171.8M	0.5%	—	0
2024-Q1	Decreased	1.7M	-1.1%	$162M	0.4%	—	0
2023-Q4	Increased	1.7M	+18.6%	$159.4M	0.5%	—	43
2023-Q3	Decreased	1.5M	-1.2%	$73.2M	0.2%	—	0
2023-Q2	Increased	1.5M	+36.2%	$93.2M	0.3%	—	47
2023-Q1	Increased	1.1M	+5.6%	$48.7M	0.2%	—	37
2022-Q4	Decreased	1M	-4.6%	$44.9M	0.2%	—	0
2022-Q3	Increased	1.1M	+0.9%	$70.8M	0.3%	—	36
2022-Q2	Decreased	1.1M	-1.9%	$53.8M	0.2%	—	0
2022-Q1	Decreased	1.1M	-37.9%	$69.3M	0.2%	—	0
2021-Q4	Increased	1.7M	+1.8%	$187.2M	0.5%	—	44
2021-Q3	Increased	1.7M	+65.8%	$176.5M	0.5%	—	53
2021-Q2	Decreased	1M	-2.2%	$91.1M	0.3%	—	0
2021-Q1	Increased	1.1M	+7.8%	$103M	0.3%	—	39
2020-Q4	New	982,814	-	$110.2M	0.4%	—	50

BPMC20 quarters

BPMC
20 quarters