CHESS ROBERT

PrivateCIK: 1227886
Location

SOUTH SAN FRANCISCO, CA

CHESS ROBERT sold 32.2% of their position (10K shares) of TWIST BIOSCIENCE CORP on the open market

Open‑market sale worth $470.0K — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderCHESS ROBERTCIK 1227886
IssuerTWIST BIOSCIENCE CORPCIK 1581280
Director
Since Oct 2018
-10K
Net shares
Net seller
$470.0K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
10K acquired · 20K disposed
Non-Derivative Transactions2

Common Stock

Direct
M · Option Exercise

Shares

+10K

Price / share

$11.89

Trade value

$118.90K

% of position

47.4%
3/17/2026
21.08K31.08K

Common Stock

Direct
S · Sale

Shares

10K

Price / share

$47.00

Trade value

$470K

% of position

32.2%
3/17/2026
31.08K21.08K
Total

Net shares

+0.00

Net value

-$351.10K

Derivative Transactions1

Stock Option (right to buy)

Direct
M · Option Exercise
Converts to

Common Stock

10K shares

Shares

10K

Strike price

11.89

Held after

18.42K

Exercisable

3/17/2026
Non-Derivative Holdings (Post-Transaction)1

Common Stock

Indirect
Shares owned42.53K
Total
42.53K indirect42.53K
Derivative Holdings (Post-Transaction)0
No derivative holdings reported
CHESS ROBERT — Insider Transaction (Form 4) Filed Mar 19, 2026 | Finecho