Dark

IONS
Ionis Pharmaceuticals, Inc. Common Stock
stock NASDAQ

At Close

May 18, 2026 3:59:57 PM EDT

72.49USD-2.344%(-1.74)2,211,477

69.66Bid 76.10Ask 6.44Spread

Pre-market

May 15, 2026 9:00:30 AM EDT

75.02USD+1.064%(+0.79)0

After-hours

May 18, 2026 4:00:30 PM EDT

72.52USD+0.041%(+0.03)268,301

OverviewOptionsHistoricalDark Pool LevelsShortsMore

IONS Volume May 18, 2026

[NF]

Exchange	Day%	Volume	30D%
Off Exchange¹	42.60	934,932	45.44
Nasdaq GSM	36.54	801,892	36.61
IEX	5.52	121,201	4.93
NYSE Arca	3.94	86,398	3.74
Cboe BZX	3.03	66,492	3.13
Cboe EDGX	1.80	39,549	1.68
MEMX	1.29	28,351	0.76
Cboe BYX	1.29	28,295	0.54
NYSE	1.14	25,015	1.05
NYSE National	0.91	20,009	0.30
Nasdaq BX	0.82	17,974	0.41
Cboe EDGA	0.57	12,513	0.63
NYSE American	0.19	4,062	0.10
Nasdaq PHLX	0.14	3,053	0.14
MIAX Pearl	0.13	2,800	0.23
CHX	0.09	2,040	0.27
LTSE	0.01	152	0.01
24X National	0.00	0	0.03

chartexchange.com

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

IONS Nutrition Facts

1.28 servings per container

Serving size

1.72M

Calories

2.19M

% Day

% Avg

Off Exchange¹ 935K

42.60%

45.44%

Nasdaq GSM 802K

36.54%

36.61%

IEX 121K

5.52%

4.93%

NYSE Arca 86K

3.94%

3.74%

Cboe BZX 66K

3.03%

3.13%

Cboe EDGX 40K

1.80%

1.68%

MEMX 28K

1.29%

0.76%

Cboe BYX 28K

1.29%

0.54%

NYSE 25K

1.14%

1.05%

NYSE National 20K

0.91%

0.30%

Nasdaq BX 18K

0.82%

0.41%

Cboe EDGA 13K

0.57%

0.63%

NYSE American 4K

0.19%

0.10%

Nasdaq PHLX 3K

0.14%

MIAX Pearl 3K

0.13%

0.23%

CHX 2K

0.09%

0.27%

LTSE 152

0.01%

24X National 0

0.00%

0.03%

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

chartexchange.com

IONS Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 934,932, which is 42.60% of today's total volume.
Today's Lit volume is 1,259,796, which is 57.40%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 45.44%.
The average Lit volume has been 54.56%.

IONS Volume by Exchange

Off Exchange

Nasdaq GSM

IEX

NYSE Arca

Cboe BZX

Cboe EDGX

MEMX

Cboe BYX

NYSE

NYSE National

Nasdaq BX