ALTIMMUNE INC

Ticker: ALT CUSIP: 02155H200 Class: COM NEW

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 283,703 Value ($000) $1,024 Avg Close $4.36 Range $3.52 - $6.03

Q3 2025

Shares 297,789 Value ($000) $1,123 Avg Close $3.86 Range $3.33 - $5.03

Q2 2025

Shares 447,470 Value ($000) $1,730 Avg Close $5.41 Range $2.90 - $7.73

Q1 2025

Shares 492,469 Value ($000) $2,463 Avg Close $6.33 Range $4.78 - $7.83

Q4 2024

Shares 633,441 Value ($000) $4,567 Avg Close $7.64 Range $5.86 - $11.16

Q3 2024

Shares 646,377 Value ($000) $3,970 Avg Close $6.77 Range $5.28 - $8.26

Q2 2024

Shares 570,174 Value ($000) $3,791 Avg Close $7.38 Range $5.64 - $11.01

Q1 2024

Shares 234,730 Value ($000) $2,390 Avg Close $10.17 Range $7.92 - $14.84

Q4 2023

Shares 261,518 Value ($000) $2,942 Avg Close $4.18 Range $2.09 - $12.51

Q3 2023

Shares 189,251 Value ($000) $492 Avg Close $2.87 Range $2.34 - $3.58

Q2 2023

Shares 256,254 Value ($000) $905 Avg Close $4.49 Range $3.32 - $6.08

Q1 2023

Shares 566,501 Value ($000) $2,391 Avg Close $11.88 Range $4.07 - $17.17

Q4 2022

Shares 177,865 Value ($000) $3 Avg Close $11.23 Range $8.29 - $16.72

Q3 2022

Shares 174,373 Value ($000) $2,227 Avg Close $14.76 Range $10.15 - $23.49

Q2 2022

Shares 123,364 Value ($000) $1,443 Avg Close $6.17 Range $3.83 - $12.03

Q1 2022

Shares 72,702 Value ($000) $443 Avg Close $7.36 Range $5.78 - $9.67

Q4 2021

Shares 78,470 Value ($000) $719 Avg Close $10.63 Range $8.40 - $12.97

Q3 2020

Shares 48,352 Value ($000) $638 Avg Close $19.99 Range $8.60 - $35.10

Q2 2020

Shares 48,352 Value ($000) $518 Avg Close $5.49 Range $2.85 - $12.74

Q1 2020

Shares 48,352 Value ($000) $155 Avg Close $2.30 Range $1.60 - $4.45

Q4 2019

Shares 53,905 Value ($000) $102 Avg Close $1.85 Range $1.51 - $2.24

Q3 2019

Shares 65,964 Value ($000) $129 Avg Close $2.22 Range $1.91 - $2.95

Q2 2019

Shares 74,612 Value ($000) $178 Avg Close $2.68 Range $2.13 - $3.53

Q1 2019

Shares 74,612 Value ($000) $216 Avg Close $2.98 Range $2.09 - $5.94

Q4 2018

Shares 61,906 Value ($000) $128 Avg Close $3.54 Range $1.70 - $7.60

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	283,703	$1,024	$4.36	$3.52 - $6.03
Q3 2025	297,789	$1,123	$3.86	$3.33 - $5.03
Q2 2025	447,470	$1,730	$5.41	$2.90 - $7.73
Q1 2025	492,469	$2,463	$6.33	$4.78 - $7.83
Q4 2024	633,441	$4,567	$7.64	$5.86 - $11.16
Q3 2024	646,377	$3,970	$6.77	$5.28 - $8.26
Q2 2024	570,174	$3,791	$7.38	$5.64 - $11.01
Q1 2024	234,730	$2,390	$10.17	$7.92 - $14.84
Q4 2023	261,518	$2,942	$4.18	$2.09 - $12.51
Q3 2023	189,251	$492	$2.87	$2.34 - $3.58
Q2 2023	256,254	$905	$4.49	$3.32 - $6.08
Q1 2023	566,501	$2,391	$11.88	$4.07 - $17.17
Q4 2022	177,865	$3	$11.23	$8.29 - $16.72
Q3 2022	174,373	$2,227	$14.76	$10.15 - $23.49
Q2 2022	123,364	$1,443	$6.17	$3.83 - $12.03
Q1 2022	72,702	$443	$7.36	$5.78 - $9.67
Q4 2021	78,470	$719	$10.63	$8.40 - $12.97
Q3 2020	48,352	$638	$19.99	$8.60 - $35.10
Q2 2020	48,352	$518	$5.49	$2.85 - $12.74
Q1 2020	48,352	$155	$2.30	$1.60 - $4.45
Q4 2019	53,905	$102	$1.85	$1.51 - $2.24
Q3 2019	65,964	$129	$2.22	$1.91 - $2.95
Q2 2019	74,612	$178	$2.68	$2.13 - $3.53
Q1 2019	74,612	$216	$2.98	$2.09 - $5.94
Q4 2018	61,906	$128	$3.54	$1.70 - $7.60