Question 1

Does Dimensional Fund Advisors own ALT stock?

Accepted Answer

Yes. As of its Q2 2026 13F, Dimensional Fund Advisors holds 639,436 shares of ALT (Altimmune), worth $1.9M.

Question 2

How many shares of ALT does Dimensional Fund Advisors own?

Accepted Answer

As of its Q2 2026 13F, Dimensional Fund Advisors holds 639,436 shares of ALT (Altimmune).

Question 3

What is Dimensional Fund Advisors' ALT position worth?

Accepted Answer

As of its Q2 2026 13F, Dimensional Fund Advisors' ALT position is worth $1.9M.

Question 4

Is Dimensional Fund Advisors buying or selling ALT?

Accepted Answer

In Q2 2026, Dimensional Fund Advisors reduced its ALT position by 406,490 shares (-38.9%).

Question 5

When did Dimensional Fund Advisors first buy ALT?

Accepted Answer

Dimensional Fund Advisors already held ALT in its Q3 2019 13F, the earliest on record, and has listed it in 24 quarterly 13F filings.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	639,436	-38.9%	$1.9M	0.0%	$3.04	0
2026-Q1	Increased	1M	+268.7%	$3.2M	0.0%	$3.08	43
2025-Q4	Decreased	283,703	-4.7%	$1M	0.0%	$3.61	0
2025-Q3	Decreased	297,789	-33.5%	$1.1M	0.0%	$3.77	0
2025-Q2	Decreased	447,470	-9.1%	$1.7M	0.0%	$3.87	0
2025-Q1	Decreased	492,469	-22.3%	$2.5M	0.0%	$5.00	0
2024-Q4	Decreased	633,441	-2.0%	$4.6M	0.0%	$7.21	0
2024-Q3	Increased	646,377	+13.4%	$4M	0.0%	$6.14	30