Question 1

Does ProShare Advisors own PRTA stock?

Accepted Answer

No. ProShare Advisors exited its PRTA (Prothena) position in Q1 2026. Its Q4 2025 13F listed 10,425 shares worth $99,559.

Question 2

How many shares of PRTA does ProShare Advisors own?

Accepted Answer

None since Q1 2026, when ProShare Advisors exited the position. Its Q4 2025 13F listed 10,425 shares worth $99,559.

Question 3

What is ProShare Advisors' PRTA position worth?

Accepted Answer

ProShare Advisors' PRTA position was worth $99,559 in its Q4 2025 13F, before the exit in Q1 2026.

Question 4

Is ProShare Advisors buying or selling PRTA?

Accepted Answer

In Q1 2026, ProShare Advisors exited its entire PRTA position.

Question 5

When did ProShare Advisors first buy PRTA?

Accepted Answer

ProShare Advisors already held PRTA in its Q4 2018 13F, the earliest on record, and listed it in 25 quarterly 13F filings.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	Exited	0	-100.0%	$0	0.0%	$9.72	0
2025-Q4	New	10,425	—	$99,559	0.0%	$9.55	30
2025-Q2	Exited	0	-100.0%	$0	0.0%	$6.07	0
2025-Q1	Decreased	11,632	-19.9%	$143,947	0.0%	$12.38	0
2024-Q4	Increased	14,524	+29.5%	$201,158	0.0%	$13.85	29
2024-Q3	New	11,212	—	$187,576	0.0%	$16.73	31