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ALT
Altimmune, Inc. Common Stock
stock NASDAQ

Market Open

Oct 16, 2025 1:59:16 PM EDT

3.97USD-0.750%(-0.03)1,986,523

3.96Bid 3.97Ask 0.01Spread

Pre-market

Oct 16, 2025 9:28:30 AM EDT

3.99USD-0.250%(-0.01)8,436

After-hours

Oct 15, 2025 4:58:30 PM EDT

3.96USD-1.000%(-0.04)0

OverviewOptionsHistoricalExchange VolumeShortsMore

ALT Volume Oct 16, 2025 1:44:55 PM EDT

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Exchange	Day%	Volume	30D%
Off Exchange¹	58.99	1,140,751	53.19
Nasdaq GSM	13.48	260,714	23.88
NYSE Arca	6.61	127,779	6.37
Cboe BZX	6.39	123,645	2.81
Cboe EDGX	3.58	69,161	3.69
IEX	3.37	65,139	3.72
MIAX Pearl	1.96	37,887	1.02
Cboe EDGA	1.53	29,662	0.59
MEMX	1.21	23,333	1.79
NYSE	1.03	19,974	1.50
NYSE National	0.74	14,387	0.54
Cboe BYX	0.50	9,644	0.58
CHX	0.47	9,004	0.03
Nasdaq PHLX	0.06	1,242	0.09
Nasdaq BX	0.05	891	0.11
NYSE American	0.03	601	0.09

chartexchange.com

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

ALT Nutrition Facts

0.72 servings per container

Serving size

2.67M

Calories

1.93M

% Day

% Avg

Off Exchange¹ 1M

58.99%

53.19%

Nasdaq GSM 261K

13.48%

23.88%

NYSE Arca 128K

6.61%

6.37%

Cboe BZX 124K

6.39%

2.81%

Cboe EDGX 69K

3.58%

3.69%

IEX 65K

3.37%

3.72%

MIAX Pearl 38K

1.96%

1.02%

Cboe EDGA 30K

1.53%

0.59%

MEMX 23K

1.21%

1.79%

NYSE 20K

1.03%

1.50%

NYSE National 14K

0.74%

0.54%

Cboe BYX 10K

0.50%

0.58%

CHX 9K

0.47%

0.03%

Nasdaq PHLX 1K

0.06%

0.09%

Nasdaq BX 891

0.05%

0.11%

NYSE American 601

0.03%

0.09%

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 1,140,751, which is 58.99% of today's total volume.
Today's Lit volume is 793,063, which is 41.01%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 53.19%.
The average Lit volume has been 46.81%.

ALT Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE Arca

Cboe BZX

Cboe EDGX

IEX

MIAX Pearl

Cboe EDGA

MEMX

NYSE

NYSE National