Question 1

How many shares of PRTA does ALLIANCEBERNSTEIN L.P. own?

Accepted Answer

As of 2026-Q2, ALLIANCEBERNSTEIN L.P. holds 69,217 shares of PRTA (PROTHENA CORP PLC).

Question 2

What is ALLIANCEBERNSTEIN L.P.'s PRTA position worth?

Accepted Answer

As of 2026-Q2, ALLIANCEBERNSTEIN L.P.'s PRTA position is worth $672,789.

Question 3

Is ALLIANCEBERNSTEIN L.P. buying or selling PRTA?

Accepted Answer

In 2026-Q2, ALLIANCEBERNSTEIN L.P. decreased their PRTA position (-0.6% change in shares).

Question 4

When did ALLIANCEBERNSTEIN L.P. first buy PRTA?

Accepted Answer

Based on available 13F filings, ALLIANCEBERNSTEIN L.P. first reported a position in PRTA in 2024-Q3. They have held the position across 31 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	69,217	-0.6%	$672,789	0.0%	$9.79	0
2026-Q1	Unchanged	69,607	0.0%	$664,747	0.0%	$9.36	0
2025-Q4	Unchanged	69,607	0.0%	$664,747	0.0%	$9.31	0
2025-Q3	Decreased	69,607	-20.5%	$679,364	0.0%	$9.76	0
2025-Q2	Increased	87,587	+87.3%	$531,653	0.0%	$6.08	38
2025-Q1	Unchanged	46,753	0.0%	$578,568	0.0%	$13.14	0
2024-Q4	Increased	46,753	+0.0%	$647,529	0.0%	$14.88	24
2024-Q3	Unchanged	46,746	0.0%	$782,061	0.0%	$20.05	0