Timothy B Lowinger Mersana Therapeutics, Inc. (MRSN) insider trading activity

Timothy B Lowinger is SVP, Chief Sci.&Tech. Officer of Mersana Therapeutics, Inc.. Currently has a direct ownership of 257,673 shares of MRSN, which is worth approximately $87,608. The most recent transaction as insider was on Jul 16, 2021, when has been sold 7,775 shares (Common Stock) at a price of $12.47 per share, resulting in proceeds of $96,954. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 258K

0% 3M change

29.27% 12M change

Total Value Held $87,608

Timothy B Lowinger Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Jul 16 2021	SELL Open market or private sale	$96,954 $12.47 p/Share	7,775 Reduced 8.5%	83,669 Common Stock
Jul 15 2021	BUY Exercise of conversion of derivative security	-	40,000 Added 30.43%	91,444 Common Stock
Jul 08 2021	BUY Exercise of conversion of derivative security	$28,000 $1.4 p/Share	20,000 Added 27.99%	51,444 Common Stock
Jul 01 2021	SELL Open market or private sale	$25,650 $13.6 p/Share	1,886 Reduced 5.66%	31,444 Common Stock
Jul 01 2021	BUY Exercise of conversion of derivative security	$9,128 $4.84 p/Share	1,886 Added 5.36%	33,330 Common Stock
Jun 21 2021	SELL Open market or private sale	$30,592 $13.78 p/Share	2,220 Reduced 6.59%	31,444 Common Stock
Jun 21 2021	BUY Exercise of conversion of derivative security	$10,745 $4.84 p/Share	2,220 Added 6.19%	33,662 Common Stock
May 20 2021	SELL Open market or private sale	$57,838 $14.1 p/Share	4,102 Reduced 11.54%	31,444 Common Stock
May 20 2021	BUY Exercise of conversion of derivative security	$19,854 $4.84 p/Share	4,102 Added 10.86%	33,671 Common Stock
Apr 20 2021	SELL Open market or private sale	$65,263 $15.91 p/Share	4,102 Reduced 11.54%	31,444 Common Stock
Apr 20 2021	BUY Exercise of conversion of derivative security	$19,854 $4.84 p/Share	4,102 Added 10.86%	33,671 Common Stock
Mar 22 2021	SELL Open market or private sale	$143,552 $17.5 p/Share	8,203 Reduced 20.69%	31,444 Common Stock
Mar 22 2021	BUY Exercise of conversion of derivative security	$39,703 $4.84 p/Share	8,203 Added 19.59%	33,671 Common Stock
Feb 22 2021	SELL Open market or private sale	$164,142 $20.01 p/Share	8,203 Reduced 20.69%	31,444 Common Stock
Feb 22 2021	BUY Exercise of conversion of derivative security	$39,703 $4.84 p/Share	8,203 Added 19.59%	33,671 Common Stock
Jan 20 2021	SELL Open market or private sale	$176,693 $21.54 p/Share	8,203 Reduced 20.69%	31,444 Common Stock
Jan 20 2021	BUY Exercise of conversion of derivative security	$39,703 $4.84 p/Share	8,203 Added 19.59%	33,671 Common Stock
Jan 15 2021	SELL Payment of exercise price or tax liability	$49,013 $21.09 p/Share	2,324 Reduced 6.88%	31,444 Common Stock
Jan 15 2021	BUY Exercise of conversion of derivative security	-	7,917 Added 18.99%	33,768 Common Stock
Dec 28 2020	BUY Exercise of conversion of derivative security	$12,600 $1.4 p/Share	9,000 Added 25.82%	25,851 Common Stock
Dec 21 2020	SELL Open market or private sale	$209,997 $25.6 p/Share	8,203 Reduced 100.0%	0 Common Stock
Dec 21 2020	BUY Exercise of conversion of derivative security	$39,703 $4.84 p/Share	8,203 Added 78.65%	2,227 Common Stock
Nov 20 2020	SELL Open market or private sale	$189,079 $23.05 p/Share	8,203 Reduced 100.0%	0 Common Stock
Nov 20 2020	BUY Exercise of conversion of derivative security	$39,703 $4.84 p/Share	8,203 Added 78.65%	2,227 Common Stock
Oct 21 2020	SELL Open market or private sale	$71,768 $17.5 p/Share	4,101 Reduced 19.57%	16,851 Common Stock

TBL

Timothy B Lowinger

SVP, Chief Sci.&Tech. Officer

Cambridge, MA

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