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ALT
Altimmune, Inc. Common Stock
stock NASDAQ

At Close

Sep 30, 2026 3:59:58 PM EDT

2.86USD-3.704%(-0.11)4,899,170

2.49Bid 2.87Ask 0.38Spread

Pre-market

Sep 30, 2026 9:26:30 AM EDT

2.99USD+0.673%(+0.02)9,720

After-hours

Sep 30, 2026 4:39:30 PM EDT

2.88USD+0.699%(+0.02)1,779

OverviewOptionsHistoricalDark Pool PrintsShortsMore

ALT Volume Sep 30, 2026

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	40.51	1,993,872	47.30
Nasdaq GSM	31.57	1,554,027	28.35
IEX	6.73	331,301	5.69
NYSE Arca	5.59	275,045	6.16
Cboe EDGX	4.99	245,802	3.60
Cboe BZX	3.23	158,748	2.74
NYSE	2.07	101,985	1.20
MEMX	1.96	96,290	1.02
Cboe BYX	1.41	69,265	1.31
NYSE National	0.58	28,451	0.93
MIAX Pearl	0.42	20,441	0.51
CHX	0.31	15,237	0.11
Cboe EDGA	0.28	13,911	0.49
Nasdaq PHLX	0.19	9,242	0.17
Nasdaq BX	0.08	3,842	0.21
NYSE American	0.06	2,742	0.10
Texas Stock Exchange LLC	0.03	1,600	0.11
24X National	0.00	200	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

1.23 servings per container

Serving size

4.00M

Calories

4.92M

% Day

% Avg

Off Exchange¹ 2M

40.51%

47.30%

Nasdaq GSM 2M

31.57%

28.35%

IEX 331K

6.73%

5.69%

NYSE Arca 275K

5.59%

6.16%

Cboe EDGX 246K

4.99%

3.60%

Cboe BZX 159K

3.23%

2.74%

NYSE 102K

2.07%

1.20%

MEMX 96K

1.96%

1.02%

Cboe BYX 69K

1.41%

1.31%

NYSE National 28K

0.58%

0.93%

MIAX Pearl 20K

0.42%

0.51%

CHX 15K

0.31%

0.11%

Cboe EDGA 14K

0.28%

0.49%

Nasdaq PHLX 9K

0.19%

0.17%

Nasdaq BX 4K

0.08%

0.21%

NYSE American 3K

0.06%

0.10%

Texas Stock Exchange LLC 2K

0.03%

0.11%

24X National 200

0.00%

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 1,993,872, which is 40.51% of today's total volume.
Today's Lit volume is 2,928,129, which is 59.49%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 47.30%.
The average Lit volume has been 52.70%.

ALT Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe EDGX

Cboe BZX

NYSE

MEMX

Cboe BYX

NYSE National

MIAX Pearl