Question 1

How many shares of PTCT does BlackRock, Inc. own?

Accepted Answer

As of 2026-Q1, BlackRock, Inc. holds 12.9M shares of PTCT (PTC THERAPEUTICS INC).

Question 2

What is BlackRock, Inc.'s PTCT position worth?

Accepted Answer

As of 2026-Q1, BlackRock, Inc.'s PTCT position is worth $882.2M.

Question 3

Is BlackRock, Inc. buying or selling PTCT?

Accepted Answer

In 2026-Q1, BlackRock, Inc. increased their PTCT position (+1.3% change in shares).

Question 4

When did BlackRock, Inc. first buy PTCT?

Accepted Answer

Based on available 13F filings, BlackRock, Inc. first reported a position in PTCT in 2024-Q4. They have held the position across 6 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	Increased	12.9M	+1.3%	$882.2M	0.0%	$64.39	32
2025-Q4	Increased	12.8M	+79.2%	$970.7M	0.0%	$76.19	49
2025-Q3	Decreased	7.1M	-4.7%	$437.6M	0.0%	$60.65	0
2025-Q2	Decreased	7.5M	-3.7%	$365.3M	0.0%	$49.84	0
2025-Q1	Decreased	7.8M	-1.6%	$395.9M	0.0%	$54.24	0
2024-Q4	New	7.9M	-	$356.6M	0.0%	$45.77	43

PTCT6 quarters

PTCT
6 quarters