MANDELIA ASHISH (VP, Controller) sold 20.8% of their position (3.58K shares) of MERSANA THERAPEUTICS, INC. on the open market

Open‑market sale worth $20.5K — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

MANDELIA ASHISH

Filed: 1/18/2023ACC: 0001104659-23-004743

InsiderMANDELIA ASHISHCIK 1782805

→

IssuerMERSANA THERAPEUTICS, INC.CIK 1442836

Officer· VP, Controller

Since Jan 2020

+54.63K

Net shares

Net buyer

$20.5K

Total sold

Open market trades

0B · 1S

Total transactions

68.34K acquired · 13.71K disposed

Non-Derivative Transactions4

Common Stock

Direct

M · Option Exercise

+4.78K

Price / share

—

Trade value

—

% of position

67.8%

1/14/2023

7.06K→11.84K

Common Stock

Direct

M · Option Exercise

+4.52K

Price / share

—

Trade value

—

% of position

38.2%

1/15/2023

11.84K→16.36K

Common Stock

Direct

M · Option Exercise

+833.00

Price / share

—

Trade value

—

% of position

5.1%

1/15/2023

16.36K→17.19K

Common Stock

Direct

S · Sale

−3.58K

Price / share

$5.74

Trade value

$20.52K

% of position

20.8%

1/17/2023

17.19K→13.62K

Total

Net shares

+6.56K

Net value

-$20.52K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	1/14/2023	M · Option Exercise	+4.78K	—	—	67.8%	7.06K	11.84K
Common Stock Direct	1/15/2023	M · Option Exercise	+4.52K	—	—	38.2%	11.84K	16.36K
Common Stock Direct	1/15/2023	M · Option Exercise	+833.00	—	—	5.1%	16.36K	17.19K
Common Stock Direct	1/17/2023	S · Sale	−3.58K	$5.74	$20.52K	20.8%	17.19K	13.62K
Total			+6.56K		-$20.52K

Derivative Transactions5

Stock option (right to buy)

Direct

A · Award

Converts to

Common Stock

47.63K shares

+47.63K

Strike price

6.06

Held after

47.63K

Exercisable

—

1/13/2023

Restricted stock unit

Direct

A · Award

Converts to

Common Stock

10.58K shares

+10.58K

Strike price

Held after

10.58K

Exercisable

—

1/13/2023

Restricted stock unit

Direct

M · Option Exercise

Converts to

Common Stock

4.78K shares

−4.78K

Strike price

Held after

14.35K

Exercisable

—

1/14/2023

Restricted stock unit

Direct

M · Option Exercise

Converts to

Common Stock

4.52K shares

−4.52K

Strike price

Held after

9.04K

Exercisable

—

1/15/2023

Restricted stock unit

Direct

M · Option Exercise

Converts to

Common Stock

833.00 shares

−833.00

Strike price

Held after

833.00

Exercisable

—

1/15/2023

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock option (right to buy) Direct	Common Stock47.63K shares	1/13/2023	A · Award	+47.63K	6.06	—	47.63K
Restricted stock unit Direct	Common Stock10.58K shares	1/13/2023	A · Award	+10.58K		—	10.58K
Restricted stock unit Direct	Common Stock4.78K shares	1/14/2023	M · Option Exercise	−4.78K		—	14.35K
Restricted stock unit Direct	Common Stock4.52K shares	1/15/2023	M · Option Exercise	−4.52K		—	9.04K
Restricted stock unit Direct	Common Stock833.00 shares	1/15/2023	M · Option Exercise	−833.00		—	833.00