GILSON MICHELLE

PrivateCIK: 1930862
Location

REDWOOD CITY, CA

GILSON MICHELLE (Chief Financial Officer) reported 2 transactions at ARCELLX, INC.

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

InsiderGILSON MICHELLECIK 1930862
IssuerARCELLX, INC.CIK 1786205
Officer· Chief Financial Officer
Since May 2022
-480.77K
Net shares
Net seller
$0.00
Total acquired
0
Open market trades
0B · 0S
11
Total transactions
59.03K acquired · 539.80K disposed
Non-Derivative Transactions2

Common Stock

Direct
U · U

Shares

67.05K

Price / share

Trade value

% of position

New position
4/28/2026
67.05K0.00

Common Stock

Indirect
U · U

Shares

5K

Price / share

Trade value

% of position

New position
4/28/2026
5K0.00
Total

Net shares

72.05K

Net value

$0.00

Derivative Transactions9

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

40.20K shares

Shares

40.20K

Strike price

8.66

Held after

0.00

Exercisable

4/28/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

32.50K shares

Shares

32.50K

Strike price

19.97

Held after

0.00

Exercisable

4/28/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

70.80K shares

Shares

70.80K

Strike price

31.03

Held after

0.00

Exercisable

4/28/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

94.60K shares

Shares

94.60K

Strike price

56.15

Held after

0.00

Exercisable

4/28/2026

Restricted Stock Unit

Direct
D · Disposition
Converts to

Common Stock

20.50K shares

Shares

20.50K

Strike price

Held after

0.00

Exercisable

4/28/2026

Restricted Stock Unit

Direct
D · Disposition
Converts to

Common Stock

61.59K shares

Shares

61.59K

Strike price

Held after

0.00

Exercisable

4/28/2026

Restricted Stock Unit

Direct
D · Disposition
Converts to

Common Stock

88.54K shares

Shares

88.54K

Strike price

Held after

0.00

Exercisable

4/28/2026

Performance-based Restricted Stock Unit

Direct
A · Award
Converts to

Common Stock

59.03K shares

Shares

+59.03K

Strike price

Held after

59.03K

Exercisable

4/28/2026

Performance-based Restricted Stock Unit

Direct
D · Disposition
Converts to

Common Stock

59.03K shares

Shares

59.03K

Strike price

Held after

0.00

Exercisable

4/28/2026
GILSON MICHELLE — Insider Transaction (Form 4) Filed Apr 28, 2026 | Finecho