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AMPH
Amphastar Pharmaceuticals, Inc.
stock NASDAQ

Market Open

Jul 31, 2026 1:24:17 PM EDT

19.84USD-2.529%(-0.52)123,943

19.79Bid 19.83Ask 0.04Spread

Pre-market

0.00USD-100.000%(-20.58)0

After-hours

Jul 29, 2026 4:37:30 PM EDT

19.44USD-5.550%(-1.14)0

OverviewOptionsHistoricalExchange VolumeShortsMore

AMPH Volume Jul 31, 2026 1:04:53 PM EDT

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Exchange	Day%	Volume	30D%
Off Exchange¹	49.77	57,334	35.27
Nasdaq GSM	27.12	31,238	45.18
IEX	7.27	8,379	5.71
NYSE Arca	4.76	5,478	3.73
Cboe EDGX	3.02	3,479	1.97
Cboe BZX	2.53	2,918	3.32
MEMX	2.20	2,531	0.71
NYSE	1.81	2,080	1.22
Cboe BYX	0.80	916	0.75
Nasdaq BX	0.39	452	0.35
Cboe EDGA	0.23	263	0.63
Nasdaq PHLX	0.08	88	0.14
LTSE	0.02	20	0.21
CHX	0.01	11	0.41
MIAX Pearl	0.01	9	0.13
NYSE National	0.00	5	0.20
NYSE American	0.00	0	0.08
24X National	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.

AMPH Nutrition Facts

0.23 servings per container

Serving size

504.38K

Calories

115.20K

% Day

% Avg

Off Exchange¹ 57K

49.77%

35.27%

Nasdaq GSM 31K

27.12%

45.18%

IEX 8K

7.27%

5.71%

NYSE Arca 5K

4.76%

3.73%

Cboe EDGX 3K

3.02%

1.97%

Cboe BZX 3K

2.53%

3.32%

MEMX 3K

2.20%

0.71%

NYSE 2K

1.81%

1.22%

Cboe BYX 916

0.80%

0.75%

Nasdaq BX 452

0.39%

0.35%

Cboe EDGA 263

0.23%

0.63%

Nasdaq PHLX 88

0.08%

0.14%

LTSE 20

0.02%

0.21%

CHX 11

0.01%

0.41%

MIAX Pearl 9

0.01%

0.13%

NYSE National 5

0.00%

0.20%

NYSE American 0

0.00%

0.08%

24X National 0

0.00%

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

chartexchange.com

AMPH Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 57,334, which is 49.77% of today's total volume.
Today's Lit volume is 57,867, which is 50.23%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 35.27%.
The average Lit volume has been 64.73%.

AMPH Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe EDGX

Cboe BZX

MEMX

NYSE

Cboe BYX

Nasdaq BX

Cboe EDGA