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AMPH
Amphastar Pharmaceuticals, Inc.
stock NASDAQ

Market Open

Oct 1, 2026 10:27:45 AM EDT

25.72USD-0.368%(-0.09)35,785

22.06Bid 25.99Ask 3.93Spread

Pre-market

Oct 1, 2026 9:08:30 AM EDT

25.72USD-0.349%(-0.09)1,179

After-hours

0.00USD0.000%(0.00)0

OverviewOptionsHistoricalExchange VolumeShortsMore

AMPH Volume Oct 1, 2026 10:05:02 AM EDT

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Exchange	Day%	Volume	30D%
Off Exchange¹	61.27	16,072	40.46
Nasdaq GSM	19.90	5,219	39.99
NYSE Arca	6.33	1,660	4.35
Cboe BZX	5.95	1,561	2.91
Cboe EDGX	2.30	603	2.31
IEX	2.23	586	5.31
CHX	0.53	140	0.11
NYSE	0.48	127	1.28
Cboe BYX	0.37	98	0.64
NYSE National	0.27	71	0.15
Nasdaq PHLX	0.27	70	0.21
Nasdaq BX	0.03	8	0.26
MIAX Pearl	0.03	7	0.21
MEMX	0.03	7	0.55
Cboe EDGA	0.00	1	0.53
Texas Stock Exchange LLC	0.00	0	0.31
LTSE	0.00	0	0.30
NYSE American	0.00	0	0.11
24X National	0.00	0	0.01

chartexchange.com

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

AMPH Nutrition Facts

0.05 servings per container

Serving size

478.74K

Calories

26.23K

% Day

% Avg

Off Exchange¹ 16K

61.27%

40.46%

Nasdaq GSM 5K

19.90%

39.99%

NYSE Arca 2K

6.33%

4.35%

Cboe BZX 2K

5.95%

2.91%

Cboe EDGX 603

2.30%

2.31%

IEX 586

2.23%

5.31%

CHX 140

0.53%

0.11%

NYSE 127

0.48%

1.28%

Cboe BYX 98

0.37%

0.64%

NYSE National 71

0.27%

0.15%

Nasdaq PHLX 70

0.27%

0.21%

Nasdaq BX 8

0.03%

0.26%

MIAX Pearl 7

0.03%

0.21%

MEMX 7

0.03%

0.55%

Cboe EDGA 1

0.00%

0.53%

Texas Stock Exchange LLC 0

0.00%

0.31%

LTSE 0

0.00%

0.30%

NYSE American 0

0.00%

0.11%

24X National 0

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

AMPH Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 16,072, which is 61.27% of today's total volume.
Today's Lit volume is 10,158, which is 38.73%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 40.46%.
The average Lit volume has been 59.54%.

AMPH Volume by Exchange

Off Exchange

Nasdaq GSM

NYSE Arca

Cboe BZX

Cboe EDGX

IEX

CHX

NYSE

Cboe BYX

NYSE National

Nasdaq PHLX