Dark

ALT
Altimmune, Inc. Common Stock
stock NASDAQ

Market Open

Aug 11, 2026 12:39:23 PM EDT

3.03USD-0.329%(-0.01)1,134,562

3.02Bid 3.03Ask 0.01Spread

Pre-market

Aug 11, 2026 9:27:30 AM EDT

3.05USD+0.329%(+0.01)3,535

After-hours

Aug 10, 2026 4:17:30 PM EDT

3.06USD+0.824%(+0.02)0

OverviewOptionsHistoricalExchange VolumeShortsMore

ALT Volume Aug 11, 2026 12:25:03 PM EDT

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	76.28	840,904	48.01
Nasdaq GSM	10.41	114,766	25.14
IEX	4.22	46,506	5.94
NYSE Arca	3.34	36,832	7.51
Cboe BZX	1.56	17,193	3.42
Cboe EDGX	1.24	13,678	3.51
NYSE National	0.79	8,700	0.91
Cboe BYX	0.58	6,386	1.15
NYSE	0.43	4,700	1.38
MEMX	0.38	4,157	1.42
MIAX Pearl	0.37	4,084	0.64
Nasdaq PHLX	0.27	2,929	0.10
Cboe EDGA	0.08	902	0.49
Nasdaq BX	0.03	375	0.18
CHX	0.02	263	0.08
NYSE American	0.00	0	0.11
24X National	0.00	0	0.02
Texas Stock Exchange LLC	0.00	0	0.01
LTSE	0.00	0	0.00

chartexchange.com

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

ALT Nutrition Facts

0.25 servings per container

Serving size

4.40M

Calories

1.10M

% Day

% Avg

Off Exchange¹ 841K

76.28%

48.01%

Nasdaq GSM 115K

10.41%

25.14%

IEX 47K

4.22%

5.94%

NYSE Arca 37K

3.34%

7.51%

Cboe BZX 17K

1.56%

3.42%

Cboe EDGX 14K

1.24%

3.51%

NYSE National 9K

0.79%

0.91%

Cboe BYX 6K

0.58%

1.15%

NYSE 5K

0.43%

1.38%

MEMX 4K

0.38%

1.42%

MIAX Pearl 4K

0.37%

0.64%

Nasdaq PHLX 3K

0.27%

0.10%

Cboe EDGA 902

0.08%

0.49%

Nasdaq BX 375

0.03%

0.18%

CHX 263

0.02%

0.08%

NYSE American 0

0.00%

0.11%

24X National 0

0.00%

0.02%

Texas Stock Exchange LLC 0

0.00%

0.01%

LTSE 0

0.00%

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 840,904, which is 76.28% of today's total volume.
Today's Lit volume is 261,471, which is 23.72%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 48.01%.
The average Lit volume has been 51.99%.

ALT Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe BZX

Cboe EDGX

NYSE National

Cboe BYX

NYSE

MEMX

MIAX Pearl