Question 1

Does Citadel Advisors own MSTX stock?

Accepted Answer

No. Citadel Advisors exited its MSTX position in Q3 2025. Its Q2 2025 13F listed 114,633 shares worth $4.6M.

Question 2

How many shares of MSTX does Citadel Advisors own?

Accepted Answer

None since Q3 2025, when Citadel Advisors exited the position. Its Q2 2025 13F listed 114,633 shares worth $4.6M.

Question 3

What is Citadel Advisors' MSTX position worth?

Accepted Answer

Citadel Advisors' MSTX position was worth $4.6M in its Q2 2025 13F, before the exit in Q3 2025.

Question 4

Is Citadel Advisors buying or selling MSTX?

Accepted Answer

In Q3 2025, Citadel Advisors exited its entire MSTX position.

Question 5

When did Citadel Advisors first buy MSTX?

Accepted Answer

Citadel Advisors first reported MSTX in its Q3 2024 13F and listed it in 4 quarterly 13F filings.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2025-Q3 Latest	Exited	0	-100.0%	$0	0.0%	—	0
2025-Q2	Increased	114,633	+449.5%	$4.6M	0.0%	—	43
2025-Q1	Decreased	20,861	-95.1%	$538,214	0.0%	—	0
2024-Q4	Increased	422,791	+139.9%	$14.9M	0.0%	—	45
2024-Q3	New	176,198	-	$5.1M	0.0%	—	37