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ALT
Altimmune, Inc. Common Stock
stock NASDAQ

Market Open

Oct 15, 2025 10:52:38 AM EDT

3.98USD+0.631%(+0.02)584,236

3.98Bid 3.99Ask 0.01Spread

Pre-market

Oct 15, 2025 9:24:30 AM EDT

3.94USD-0.505%(-0.02)8,378

After-hours

Oct 14, 2025 4:55:30 PM EDT

3.98USD+0.505%(+0.02)0

OverviewOptionsHistoricalDark Pool PrintsShortsMore

ALT Volume Oct 15, 2025 10:34:53 AM EDT

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	57.48	307,736	53.24
Nasdaq GSM	18.27	97,799	24.00
NYSE Arca	8.31	44,505	6.33
Cboe EDGX	4.15	22,192	3.68
Cboe BZX	3.78	20,219	2.72
IEX	3.34	17,874	3.73
MEMX	2.25	12,068	1.81
NYSE	1.10	5,911	1.51
Cboe BYX	0.70	3,721	0.58
Cboe EDGA	0.28	1,485	0.57
MIAX Pearl	0.27	1,458	1.00
NYSE National	0.04	210	0.53
NYSE American	0.02	100	0.09
Nasdaq PHLX	0.02	100	0.09
CHX	0.00	3	0.02
Nasdaq BX	0.00	2	0.11

chartexchange.com

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

ALT Nutrition Facts

0.20 servings per container

Serving size

2.66M

Calories

535.38K

% Day

% Avg

Off Exchange¹ 308K

57.48%

53.24%

Nasdaq GSM 98K

18.27%

24.00%

NYSE Arca 45K

8.31%

6.33%

Cboe EDGX 22K

4.15%

3.68%

Cboe BZX 20K

3.78%

2.72%

IEX 18K

3.34%

3.73%

MEMX 12K

2.25%

1.81%

NYSE 6K

1.10%

1.51%

Cboe BYX 4K

0.70%

0.58%

Cboe EDGA 1K

0.28%

0.57%

MIAX Pearl 1K

0.27%

1.00%

NYSE National 210

0.04%

0.53%

NYSE American 100

0.02%

0.09%

Nasdaq PHLX 100

0.02%

0.09%

CHX 3

0.00%

0.02%

Nasdaq BX 2

0.00%

0.11%

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 307,736, which is 57.48% of today's total volume.
Today's Lit volume is 227,647, which is 42.52%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 53.24%.
The average Lit volume has been 46.76%.

ALT Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE Arca

Cboe EDGX

Cboe BZX

IEX

MEMX

NYSE

Cboe BYX

Cboe EDGA

MIAX Pearl