DESCHUYTNER BRIAN

PrivateCIK: 1782163
Location

CAMBRIDGE, MA

DESCHUYTNER BRIAN (Sr. VP, Finance & Product stgy) reported 1 transaction at MERSANA THERAPEUTICS, INC.

Review the transaction codes below to understand the nature of each event.

InsiderDESCHUYTNER BRIANCIK 1782163
Officer· Sr. VP, Finance & Product stgy
Since Jul 2019
-60.71K
Net shares
Net seller
$0.00
Total acquired
0
Open market trades
0B · 0S
19
Total transactions
60.71K disposed
Non-Derivative Transactions1

Common Stock

Direct
U · U

Shares

5.01K

Price / share

Trade value

% of position

New position
1/6/2026
5.01K0.00
Total

Net shares

5.01K

Net value

$0.00

Derivative Transactions18

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

3.52K shares

Shares

3.52K

Strike price

16.0125

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

7.73K shares

Shares

7.73K

Strike price

16.0125

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

4.01K shares

Shares

4.01K

Strike price

99.75

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

5.59K shares

Shares

5.59K

Strike price

99.75

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

178.00 shares

Shares

178.00

Strike price

154.00

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

2.67K shares

Shares

2.67K

Strike price

154.00

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

327.00 shares

Shares

327.00

Strike price

527.25

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

4.17K shares

Shares

4.17K

Strike price

527.25

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

281.00 shares

Shares

281.00

Strike price

157.00

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

4.22K shares

Shares

4.22K

Strike price

157.00

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

818.00 shares

Shares

818.00

Strike price

151.50

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

6.38K shares

Shares

6.38K

Strike price

151.50

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

1.08K shares

Shares

1.08K

Strike price

75.50

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

9.42K shares

Shares

9.42K

Strike price

75.50

Held after

0.00

Exercisable

1/6/2026

Restricted Stock Units

Direct
D · Disposition
Converts to

Common Stock

250.00 shares

Shares

250.00

Strike price

0

Held after

0.00

Exercisable

1/6/2026

Restricted Stock Units

Direct
D · Disposition
Converts to

Common Stock

800.00 shares

Shares

800.00

Strike price

0

Held after

0.00

Exercisable

1/6/2026

Restricted Stock Units

Direct
D · Disposition
Converts to

Common Stock

1.75K shares

Shares

1.75K

Strike price

0

Held after

0.00

Exercisable

1/6/2026

Restricted Stock Units

Direct
D · Disposition
Converts to

Common Stock

2.50K shares

Shares

2.50K

Strike price

0

Held after

0.00

Exercisable

1/6/2026
DESCHUYTNER BRIAN — Insider Transaction (Form 4) Filed Jan 6, 2026 | Finecho