LOWINGER TIMOTHY B

PrivateCIK: 1709775
Location

CAMBRIDGE, MA

LOWINGER TIMOTHY B (Chief Scientific Officer) reported 1 transaction at MERSANA THERAPEUTICS, INC.

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

InsiderLOWINGER TIMOTHY BCIK 1709775
Officer· Chief Scientific Officer
Since Jul 2018
-58.52K
Net shares
Net seller
$0.00
Total acquired
0
Open market trades
0B · 0S
22
Total transactions
58.52K disposed
Non-Derivative Transactions1

Common Stock

Direct
U · U

Shares

10.47K

Price / share

Trade value

% of position

New position
1/6/2026
10.47K0.00
Total

Net shares

10.47K

Net value

$0.00

Derivative Transactions21

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

3.05K shares

Shares

3.05K

Strike price

16.0125

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

6.70K shares

Shares

6.70K

Strike price

16.0125

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

696.00 shares

Shares

696.00

Strike price

355.75

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

1.58K shares

Shares

1.58K

Strike price

355.75

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

713.00 shares

Shares

713.00

Strike price

87.75

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

419.00 shares

Shares

419.00

Strike price

87.75

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

920.00 shares

Shares

920.00

Strike price

154.00

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

3.09K shares

Shares

3.09K

Strike price

154.00

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

275.00 shares

Shares

275.00

Strike price

527.25

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

4.97K shares

Shares

4.97K

Strike price

527.25

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

215.00 shares

Shares

215.00

Strike price

157.00

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

3.23K shares

Shares

3.23K

Strike price

157.00

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

858.00 shares

Shares

858.00

Strike price

151.50

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

5.89K shares

Shares

5.89K

Strike price

151.50

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

1.04K shares

Shares

1.04K

Strike price

75.50

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

7.96K shares

Shares

7.96K

Strike price

75.50

Held after

0.00

Exercisable

1/6/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

1.83K shares

Shares

1.83K

Strike price

102.50

Held after

0.00

Exercisable

1/6/2026

Restricted Stock Units

Direct
D · Disposition
Converts to

Common Stock

192.00 shares

Shares

192.00

Strike price

0

Held after

0.00

Exercisable

1/6/2026

Restricted Stock Units

Direct
D · Disposition
Converts to

Common Stock

750.00 shares

Shares

750.00

Strike price

0

Held after

0.00

Exercisable

1/6/2026

Restricted Stock Units

Direct
D · Disposition
Converts to

Common Stock

1.50K shares

Shares

1.50K

Strike price

0

Held after

0.00

Exercisable

1/6/2026

Restricted Stock Units

Direct
D · Disposition
Converts to

Common Stock

2.17K shares

Shares

2.17K

Strike price

0

Held after

0.00

Exercisable

1/6/2026
LOWINGER TIMOTHY B — Insider Transaction (Form 4) Filed Jan 6, 2026 | Finecho