Dark

ALT
Altimmune, Inc. Common Stock
stock NASDAQ

At Close

Dec 12, 2025 3:59:59 PM EST

5.26USD-1.404%(-0.08)6,369,007

0.00Bid 0.00Ask 0.00Spread

Pre-market

Dec 12, 2025 9:26:30 AM EST

5.40USD+1.124%(+0.06)77,012

After-hours

Dec 12, 2025 4:49:30 PM EST

5.33USD+1.231%(+0.06)7,063

OverviewOptionsHistoricalExchange VolumeShortsMore

ALT Volume Dec 12, 2025

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	52.01	3,312,126	50.76
Nasdaq GSM	20.82	1,325,742	23.48
NYSE Arca	7.88	501,919	7.39
Cboe EDGX	5.28	336,197	5.08
IEX	3.57	227,117	3.99
Cboe BZX	2.90	184,527	3.23
NYSE	2.37	151,102	1.61
Cboe BYX	1.38	87,670	0.62
MEMX	1.33	84,711	1.87
MIAX Pearl	0.86	55,055	0.71
NYSE National	0.78	49,783	0.42
Cboe EDGA	0.58	37,060	0.50
Nasdaq BX	0.10	6,199	0.18
NYSE American	0.08	4,967	0.05
Nasdaq PHLX	0.06	3,950	0.10
CHX	0.01	546	0.01

chartexchange.com

¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

ALT Nutrition Facts

1.85 servings per container

Serving size

3.44M

Calories

6.37M

% Day

% Avg

Off Exchange¹ 3M

52.01%

50.76%

Nasdaq GSM 1M

20.82%

23.48%

NYSE Arca 502K

7.88%

7.39%

Cboe EDGX 336K

5.28%

5.08%

IEX 227K

3.57%

3.99%

Cboe BZX 185K

2.90%

3.23%

NYSE 151K

2.37%

1.61%

Cboe BYX 88K

1.38%

0.62%

MEMX 85K

1.33%

1.87%

MIAX Pearl 55K

0.86%

0.71%

NYSE National 50K

0.78%

0.42%

Cboe EDGA 37K

0.58%

0.50%

Nasdaq BX 6K

0.10%

0.18%

NYSE American 5K

0.08%

0.05%

Nasdaq PHLX 4K

0.06%

0.10%

CHX 546

0.01%

¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

chartexchange.com

ALT Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 3,312,126, which is 52.01% of today's total volume.
Today's Lit volume is 3,056,545, which is 47.99%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 50.76%.
The average Lit volume has been 49.24%.

ALT Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE Arca

Cboe EDGX

IEX

Cboe BZX

NYSE

Cboe BYX

MEMX

MIAX Pearl

NYSE National