Question 1

How many shares of UMC does Parallax Volatility Advisers, L.P. own?

Accepted Answer

Parallax Volatility Advisers, L.P. previously held 0 shares of UMC (UNITED MICROELECTRON-SP ADR) before exiting the position in 2026-Q1.

Question 2

What is Parallax Volatility Advisers, L.P.'s UMC position worth?

Accepted Answer

Parallax Volatility Advisers, L.P.'s UMC position was last reported at $0 in 2026-Q1 before the exit.

Question 3

Is Parallax Volatility Advisers, L.P. buying or selling UMC?

Accepted Answer

In 2026-Q1, Parallax Volatility Advisers, L.P. exited their UMC position entirely (-100.0% change in shares).

Question 4

When did Parallax Volatility Advisers, L.P. first buy UMC?

Accepted Answer

Based on available 13F filings, Parallax Volatility Advisers, L.P. first reported a position in UMC in 2024-Q3. They have held the position across 16 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	Exited	0	-100.0%	$0	0.0%	$9.90	0
2025-Q4	Decreased	2,550	-60.9%	$20,043	0.0%	$7.96	0
2025-Q3	Increased	6,528	+5.3%	$49,482	0.0%	$7.59	22
2025-Q2	Decreased	6,198	-41.5%	$47,415	0.0%	$7.68	0
2025-Q1	Decreased	10,599	-91.8%	$75,783	0.0%	$6.16	0
2024-Q4	Increased	128,456	+356.1%	$833,679	0.0%	$6.12	40
2024-Q3	Increased	28,167	+269.7%	$237,166	0.0%	$8.21	37