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MRSN
Mersana Therapeutics, Inc. Common Stock
stock NASDAQ

At Close

Dec 19, 2025 3:59:30 PM EST

29.02USD-0.275%(-0.08)85,204

0.00Bid 0.00Ask 0.00Spread

Pre-market

0.00USD-100.000%(-29.10)0

After-hours

Dec 19, 2025 4:00:30 PM EST

28.94USD-0.276%(-0.08)238

OverviewOptionsHistoricalDark Pool LevelsShortsMore

MRSN Volume Dec 19, 2025

[NF]

Exchange	Day%	Volume	30D%
Nasdaq GSM	59.07	50,004	27.43
Off Exchange¹	20.63	17,461	34.17
NYSE Arca	9.86	8,351	20.24
Cboe EDGX	3.54	2,993	8.17
Cboe BZX	3.45	2,919	1.94
IEX	1.46	1,234	3.17
Nasdaq BX	0.55	464	0.60
NYSE	0.45	380	0.45
Cboe BYX	0.31	266	0.67
NYSE National	0.31	259	0.46
MEMX	0.30	258	1.51
Cboe EDGA	0.08	70	0.43
CHX	0.00	0	0.45
MIAX Pearl	0.00	0	0.24
Nasdaq PHLX	0.00	0	0.06
NYSE American	0.00	0	0.02

chartexchange.com

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

MRSN Nutrition Facts

0.48 servings per container

Serving size

176.41K

Calories

84.66K

% Day

% Avg

Nasdaq GSM 50K

59.07%

27.43%

Off Exchange¹ 17K

20.63%

34.17%

NYSE Arca 8K

9.86%

20.24%

Cboe EDGX 3K

3.54%

8.17%

Cboe BZX 3K

3.45%

1.94%

IEX 1K

1.46%

3.17%

Nasdaq BX 464

0.55%

0.60%

NYSE 380

0.45%

Cboe BYX 266

0.31%

0.67%

NYSE National 259

0.31%

0.46%

MEMX 258

0.30%

1.51%

Cboe EDGA 70

0.08%

0.43%

CHX 0

0.00%

0.45%

MIAX Pearl 0

0.00%

0.24%

Nasdaq PHLX 0

0.00%

0.06%

NYSE American 0

0.00%

0.02%

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

chartexchange.com

MRSN Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 17,461, which is 20.63% of today's total volume.
Today's Lit volume is 67,198, which is 79.37%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 34.17%.
The average Lit volume has been 65.83%.

MRSN Volume by Exchange

Nasdaq GSM

Off Exchange

NYSE Arca

Cboe EDGX

Cboe BZX

IEX

Nasdaq BX

NYSE

Cboe BYX

NYSE National

MEMX