Dark

ALT
Altimmune, Inc. Common Stock
stock NASDAQ

At Close

Dec 8, 2025 3:59:55 PM EST

5.60USD+6.870%(+0.36)5,469,702

0.00Bid 0.00Ask 0.00Spread

Pre-market

Dec 8, 2025 9:28:30 AM EST

5.30USD+1.145%(+0.06)11,317

After-hours

Dec 8, 2025 4:55:30 PM EST

5.63USD+0.538%(+0.03)20,616

OverviewOptionsHistoricalDark Pool PrintsShortsMore

ALT Volume Dec 8, 2025

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	50.42	2,792,841	51.15
Nasdaq GSM	20.76	1,149,938	23.35
NYSE Arca	8.99	497,986	7.15
Cboe EDGX	6.64	367,778	5.04
Cboe BZX	4.20	232,680	3.24
IEX	3.54	196,217	4.13
MEMX	1.52	83,998	1.82
NYSE	1.30	72,032	1.62
Cboe EDGA	0.78	43,219	0.48
MIAX Pearl	0.69	38,021	0.72
NYSE National	0.38	20,975	0.40
Cboe BYX	0.32	17,463	0.54
Nasdaq BX	0.27	14,937	0.19
Nasdaq PHLX	0.14	7,681	0.11
NYSE American	0.05	2,663	0.05
CHX	0.02	960	0.03

chartexchange.com

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

ALT Nutrition Facts

1.77 servings per container

Serving size

3.13M

Calories

5.54M

% Day

% Avg

Off Exchange¹ 3M

50.42%

51.15%

Nasdaq GSM 1M

20.76%

23.35%

NYSE Arca 498K

8.99%

7.15%

Cboe EDGX 368K

6.64%

5.04%

Cboe BZX 233K

4.20%

3.24%

IEX 196K

3.54%

4.13%

MEMX 84K

1.52%

1.82%

NYSE 72K

1.30%

1.62%

Cboe EDGA 43K

0.78%

0.48%

MIAX Pearl 38K

0.69%

0.72%

NYSE National 21K

0.38%

0.40%

Cboe BYX 17K

0.32%

0.54%

Nasdaq BX 15K

0.27%

0.19%

Nasdaq PHLX 8K

0.14%

0.11%

NYSE American 3K

0.05%

CHX 960

0.02%

0.03%

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 2,792,841, which is 50.42% of today's total volume.
Today's Lit volume is 2,746,548, which is 49.58%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 51.15%.
The average Lit volume has been 48.85%.

ALT Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE Arca

Cboe EDGX

Cboe BZX

IEX

MEMX

NYSE

Cboe EDGA

MIAX Pearl

NYSE National