Question 1

Does Marshall Wace own PBYI stock?

Accepted Answer

No. Marshall Wace exited its PBYI (Puma Biotechnology) position in Q4 2025. Its Q3 2025 13F listed 557,548 shares worth $3M.

Question 2

How many shares of PBYI does Marshall Wace own?

Accepted Answer

None since Q4 2025, when Marshall Wace exited the position. Its Q3 2025 13F listed 557,548 shares worth $3M.

Question 3

What is Marshall Wace's PBYI position worth?

Accepted Answer

Marshall Wace's PBYI position was worth $3M in its Q3 2025 13F, before the exit in Q4 2025.

Question 4

Is Marshall Wace buying or selling PBYI?

Accepted Answer

In Q4 2025, Marshall Wace exited its entire PBYI position.

Question 5

When did Marshall Wace first buy PBYI?

Accepted Answer

Marshall Wace already held PBYI in its Q4 2018 13F, the earliest on record, and listed it in 15 quarterly 13F filings.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2025-Q4 Latest	Exited	0	-100.0%	$0	0.0%	$5.95	0
2025-Q3	Increased	557,548	+659.5%	$3M	0.0%	$5.31	43
2025-Q2	Decreased	73,415	-66.1%	$251,813	0.0%	$3.43	0
2025-Q1	Increased	216,413	+152.9%	$640,582	0.0%	$2.96	39
2024-Q4	New	85,580	—	$261,019	0.0%	$3.05	32
2024-Q3	Exited	0	-100.0%	$0	0.0%	$2.55	0