ROSENTHAL ARNON

PrivateCIK: 1757770
Location

SOUTH SAN FRANCISCO, CA

ROSENTHAL ARNON (Chief Executive Officer) sold 3.6% of their position (87.22K shares) of ALECTOR, INC. on the open market

Open‑market sale worth $172.2K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderROSENTHAL ARNONCIK 1757770
IssuerALECTOR, INC.CIK 1653087
DirectorOfficer· Chief Executive Officer
Since Feb 2019
-87.22K
Net shares
Net seller
$172.2K
Total sold
1
Open market trades
0B · 1S
1
Total transactions
87.22K disposed
Non-Derivative Transactions1

Common Stock

Direct
S · Sale

Shares

87.22K

Price / share

$1.97

Trade value

$172.19K

% of position

3.6%
6/2/2026
2.45M2.37M
Total

Net shares

87.22K

Net value

-$172.19K

Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)4

Common Stock

Indirect
Shares owned1.97M

Common Stock

Indirect
Shares owned652.50K

Common Stock

Indirect
Shares owned652.50K

Common Stock

Indirect
Shares owned652.50K
Total
3.93M indirect3.93M
Derivative Holdings (Post-Transaction)0
No derivative holdings reported
ROSENTHAL ARNON — Insider Transaction (Form 4) Filed Jun 3, 2026 | Finecho