Arnon Rosenthal
CIK: 0001757770
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Alector, Inc.
Discretionary Trading P&L
Holdings
Transaction History (32 total)
- Oct 14, 2026ALEC
Alector, Inc.
Award(A)Direct217.5K shares- - Oct 13, 2026ALEC
Alector, Inc.
Award(A)DirectEmployee Stock Option (right to buy)
132.5K shares- - Oct 13, 2026ALEC
Alector, Inc.
Award(A)DirectEmployee Stock Option (right to buy)
520K shares- - Oct 13, 2026ALEC
Alector, Inc.
Award(A)DirectEmployee Stock Option (right to buy)
417.2K shares- - Oct 13, 2026ALEC
Alector, Inc.
Disposition(D)DirectEmployee Stock Option (right to buy)
417.2K shares- - Oct 13, 2026ALEC
Alector, Inc.
Award(A)DirectEmployee Stock Option (right to buy)
457K shares- - Oct 13, 2026ALEC
Alector, Inc.
Disposition(D)DirectEmployee Stock Option (right to buy)
500K shares- - Oct 13, 2026ALEC
Alector, Inc.
Award(A)DirectEmployee Stock Option (right to buy)
500K shares- - Oct 13, 2026ALEC
Alector, Inc.
Disposition(D)DirectEmployee Stock Option (right to buy)
275K shares- - Oct 13, 2026ALEC
Alector, Inc.
Award(A)DirectEmployee Stock Option (right to buy)
275K shares- - Oct 13, 2026ALEC
Alector, Inc.
Disposition(D)DirectEmployee Stock Option (right to buy)
520K shares- - Oct 13, 2026ALEC
Alector, Inc.
Disposition(D)DirectEmployee Stock Option (right to buy)
457K shares- - Oct 13, 2026ALEC
Alector, Inc.
Disposition(D)DirectEmployee Stock Option (right to buy)
132.5K shares- - Oct 13, 2026ALEC
Alector, Inc.
Award(A)DirectEmployee Stock Option (right to buy)
119.4K shares- - Oct 13, 2026ALEC
Alector, Inc.
Disposition(D)DirectEmployee Stock Option (right to buy)
119.4K shares- - Sep 3, 2026ALEC
Alector, Inc.
Sale(S)Direct72.6K shares at avg. $2.66$193K - Aug 19, 2026ALEC
Alector, Inc.
Gift(G)Indirect350K shares- - Aug 19, 2026ALEC
Alector, Inc.
Gift(G)Indirect1.1M shares- - Aug 19, 2026ALEC
Alector, Inc.
Gift(G)Indirect350K shares- - Aug 19, 2026ALEC
Alector, Inc.
Gift(G)Indirect350K shares- - Jun 2, 2026ALEC
Alector, Inc.
Sale(S)Direct87.2K shares at avg. $1.97$172K - Mar 13, 2026ALEC
Alector, Inc.
Award(A)Direct116.2K shares- - Mar 2, 2026ALEC
Alector, Inc.
Sale(S)Direct81.9K shares at avg. $2.12$174K - Dec 3, 2025ALEC
Alector, Inc.
Sale(S)Direct104.3K shares at avg. $1.12$117K - Nov 10, 2025ALEC
Alector, Inc.
Award(A)Direct174.2K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 14, 2026 | ALEC Alector, Inc. | Award(A) | 217,500 | - | $0 | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Award(A) Employee Stock Option (right to buy) | 132,500 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Award(A) Employee Stock Option (right to buy) | 520,000 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Award(A) Employee Stock Option (right to buy) | 417,213 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Disposition(D) Employee Stock Option (right to buy) | 417,213 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Award(A) Employee Stock Option (right to buy) | 457,038 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Disposition(D) Employee Stock Option (right to buy) | 500,000 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Award(A) Employee Stock Option (right to buy) | 500,000 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Disposition(D) Employee Stock Option (right to buy) | 275,000 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Award(A) Employee Stock Option (right to buy) | 275,000 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Disposition(D) Employee Stock Option (right to buy) | 520,000 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Disposition(D) Employee Stock Option (right to buy) | 457,038 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Disposition(D) Employee Stock Option (right to buy) | 132,500 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Award(A) Employee Stock Option (right to buy) | 119,446 | - | - | Direct |
| Oct 13, 2026 | ALEC Alector, Inc. | Disposition(D) Employee Stock Option (right to buy) | 119,446 | - | - | Direct |
| Sep 3, 2026 | ALEC Alector, Inc. | Sale(S) | 72,606 | $2.66 | $193,473 | Direct |
| Aug 19, 2026 | ALEC Alector, Inc. | Gift(G) | 350,000 | - | $0 | Indirect |
| Aug 19, 2026 | ALEC Alector, Inc. | Gift(G) | 1,050,000 | - | $0 | Indirect |
| Aug 19, 2026 | ALEC Alector, Inc. | Gift(G) | 350,000 | - | $0 | Indirect |
| Aug 19, 2026 | ALEC Alector, Inc. | Gift(G) | 350,000 | - | $0 | Indirect |
| Jun 2, 2026 | ALEC Alector, Inc. | Sale(S) | 87,216 | $1.97 | $172,191 | Direct |
| Mar 13, 2026 | ALEC Alector, Inc. | Award(A) | 116,246 | - | $0 | Direct |
| Mar 2, 2026 | ALEC Alector, Inc. | Sale(S) | 81,864 | $2.12 | $173,822 | Direct |
| Dec 3, 2025 | ALEC Alector, Inc. | Sale(S) | 104,347 | $1.12 | $116,827 | Direct |
| Nov 10, 2025 | ALEC Alector, Inc. | Award(A) | 174,167 | - | - | Direct |
1-25 of 32 transactions
About Rosenthal Arnon
Rosenthal Arnon (SEC CIK 0001757770) files insider reports with the SEC as Chief Executive Officer of Alector, Inc. (ALEC).
Signal8 holds 15 ownership filings by Rosenthal Arnon, all Form 4s, filed between Sep 4, 2024 and Oct 15, 2026. Those filings report 32 transactions, from Sep 3, 2024 to Oct 14, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Rosenthal Arnon's filings is in SOUTH SAN FRANCISCO, CA.
Recent filings by Rosenthal Arnon
- Oct 14, 2026: Grant or award of ALEC shares (Form 4, code A).
- Oct 13, 2026: Grants or awards of ALEC derivative securities (3 lines, Form 4, code A).
- Oct 13, 2026: Disposition to issuer transaction of ALEC derivative securities (Form 4, code D).
- Oct 13, 2026: Grant or award of ALEC derivative securities (Form 4, code A).
- Oct 13, 2026: Disposition to issuer transaction of ALEC derivative securities (Form 4, code D).
Other insiders filing for Alector, Inc. (ALEC)
- Wong-Sarad Grace, Principal Accounting Officer
- Berkley Neil Lindsay, CFO & Chief Business Officer
- Yaffe Kristine, Director
- SCHELLER RICHARD H, Director
- Hammond Paula, Director
- GAROFALO ELIZABETH A., Director