MANDELIA ASHISH (VP, Controller) sold 17.7% of their position (5.03K shares) of MERSANA THERAPEUTICS, INC. on the open market

Open‑market sale worth $13.6K — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

MANDELIA ASHISH

Filed: 1/17/2024ACC: 0001104659-24-004549

InsiderMANDELIA ASHISHCIK 1782805

→

IssuerMERSANA THERAPEUTICS, INC.CIK 1442836

Officer· VP, Controller

Since Jan 2020

+86.64K

Net shares

Net buyer

$13.6K

Total sold

Open market trades

0B · 1S

Total transactions

104.45K acquired · 17.80K disposed

Non-Derivative Transactions5

Common Stock

Direct

M · Option Exercise

+2.65K

Price / share

—

Trade value

—

% of position

17.0%

1/13/2024

15.57K→18.22K

Common Stock

Direct

M · Option Exercise

+4.78K

Price / share

—

Trade value

—

% of position

26.3%

1/14/2024

18.22K→23K

Common Stock

Direct

M · Option Exercise

+4.52K

Price / share

—

Trade value

—

% of position

19.6%

1/15/2024

23K→27.52K

Common Stock

Direct

M · Option Exercise

+833.00

Price / share

—

Trade value

—

% of position

3.0%

1/15/2024

27.52K→28.35K

Common Stock

Direct

S · Sale

−5.03K

Price / share

$2.71

Trade value

$13.62K

% of position

17.7%

1/16/2024

28.35K→23.33K

Total

Net shares

+7.75K

Net value

-$13.62K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	1/13/2024	M · Option Exercise	+2.65K	—	—	17.0%	15.57K	18.22K
Common Stock Direct	1/14/2024	M · Option Exercise	+4.78K	—	—	26.3%	18.22K	23K
Common Stock Direct	1/15/2024	M · Option Exercise	+4.52K	—	—	19.6%	23K	27.52K
Common Stock Direct	1/15/2024	M · Option Exercise	+833.00	—	—	3.0%	27.52K	28.35K
Common Stock Direct	1/16/2024	S · Sale	−5.03K	$2.71	$13.62K	17.7%	28.35K	23.33K
Total			+7.75K		-$13.62K

Derivative Transactions6

Restricted Stock Unit

Direct

M · Option Exercise

Converts to

Common Stock

2.65K shares

−2.65K

Strike price

Held after

7.94K

Exercisable

—

1/13/2024

Restricted Stock Unit

Direct

M · Option Exercise

Converts to

Common Stock

4.78K shares

−4.78K

Strike price

Held after

9.57K

Exercisable

—

1/14/2024

Restricted Stock Unit

Direct

M · Option Exercise

Converts to

Common Stock

4.52K shares

−4.52K

Strike price

Held after

4.52K

Exercisable

—

1/15/2024

Restricted Stock Unit

Direct

M · Option Exercise

Converts to

Common Stock

833.00 shares

−833.00

Strike price

Held after

0.00

Exercisable

—

1/15/2024

Stock Option (Right to Buy)

Direct

A · Award

Converts to

Common Stock

75K shares

+75K

Strike price

3.02

Held after

75K

Exercisable

—

1/15/2024

Restricted Stock Unit

Direct

A · Award

Converts to

Common Stock

16.67K shares

+16.67K

Strike price

Held after

16.67K

Exercisable

—

1/15/2024

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Unit Direct	Common Stock2.65K shares	1/13/2024	M · Option Exercise	−2.65K		—	7.94K
Restricted Stock Unit Direct	Common Stock4.78K shares	1/14/2024	M · Option Exercise	−4.78K		—	9.57K
Restricted Stock Unit Direct	Common Stock4.52K shares	1/15/2024	M · Option Exercise	−4.52K		—	4.52K
Restricted Stock Unit Direct	Common Stock833.00 shares	1/15/2024	M · Option Exercise	−833.00		—	0.00
Stock Option (Right to Buy) Direct	Common Stock75K shares	1/15/2024	A · Award	+75K	3.02	—	75K
Restricted Stock Unit Direct	Common Stock16.67K shares	1/15/2024	A · Award	+16.67K		—	16.67K