ROSENTHAL ARNON

PrivateCIK: 1757770
Location

SOUTH SAN FRANCISCO, CA

ROSENTHAL ARNON (Chief Executive Officer) sold 3.4% of their position (81.86K shares) of ALECTOR, INC. on the open market

Open‑market sale worth $173.8K — 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
-81.86K
Net shares
Net seller
$173.8K
Total sold
1
Open market trades
0B · 1S
1
Total transactions
81.86K disposed
Non-Derivative Transactions1

Common Stock

Direct
S · Sale

Shares

81.86K

Price / share

$2.12

Trade value

$173.82K

% of position

3.4%
3/2/2026
2.42M2.34M
Total

Net shares

81.86K

Net value

-$173.82K

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

Common Stock

Indirect
Shares owned652.50K

Common Stock

Indirect
Shares owned652.50K

Common Stock

Indirect
Shares owned1.97M

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 Mar 3, 2026 | Finecho