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AMPH
Amphastar Pharmaceuticals, Inc.
stock NASDAQ

Market Open

Oct 1, 2026 9:42:01 AM EDT

25.69USD-0.465%(-0.12)10,132

22.05Bid 25.96Ask 3.91Spread

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

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Exchange	Day%	Volume	30D%
Off Exchange¹	43.70	222,590	40.42
Nasdaq GSM	34.86	177,563	40.02
IEX	4.97	25,298	5.32
NYSE Arca	4.87	24,826	4.35
Cboe BZX	4.14	21,079	2.91
NYSE	2.14	10,885	1.28
Cboe EDGX	1.77	9,039	2.31
MEMX	0.84	4,299	0.55
Cboe EDGA	0.62	3,149	0.53
Cboe BYX	0.49	2,506	0.64
Texas Stock Exchange LLC	0.41	2,078	0.31
LTSE	0.28	1,426	0.30
MIAX Pearl	0.20	1,035	0.21
NYSE American	0.20	1,027	0.11
Nasdaq PHLX	0.16	802	0.21
CHX	0.13	684	0.11
24X National	0.11	561	0.01
NYSE National	0.05	251	0.15
Nasdaq BX	0.05	241	0.26

chartexchange.com

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

AMPH Nutrition Facts

1.06 servings per container

Serving size

478.74K

Calories

509.34K

% Day

% Avg

Off Exchange¹ 223K

43.70%

40.42%

Nasdaq GSM 178K

34.86%

40.02%

IEX 25K

4.97%

5.32%

NYSE Arca 25K

4.87%

4.35%

Cboe BZX 21K

4.14%

2.91%

NYSE 11K

2.14%

1.28%

Cboe EDGX 9K

1.77%

2.31%

MEMX 4K

0.84%

0.55%

Cboe EDGA 3K

0.62%

0.53%

Cboe BYX 3K

0.49%

0.64%

Texas Stock Exchange LLC 2K

0.41%

0.31%

LTSE 1K

0.28%

0.30%

MIAX Pearl 1K

0.20%

0.21%

NYSE American 1K

0.20%

0.11%

Nasdaq PHLX 802

0.16%

0.21%

CHX 684

0.13%

0.11%

24X National 561

0.11%

0.01%

NYSE National 251

0.05%

0.15%

Nasdaq BX 241

0.05%

0.26%

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 222,590, which is 43.70% of today's total volume.
Today's Lit volume is 286,749, which is 56.30%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 40.42%.
The average Lit volume has been 59.58%.

AMPH Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe BZX

NYSE

Cboe EDGX

MEMX

Cboe EDGA

Cboe BYX

Texas Stock Exchange LLC