Transaction · 0001193125-26-383857

Rosenthal Arnon

Rosenthal Arnon, CEO, reported an open-market or private sale at Alector, Inc. involving 72606.000000 shares for an estimated $193473.21. Reported holdings after the transaction were 2294600.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SCEO
ALECAlector, Inc.
Trade date
Sep 03, 2026
Filing date
Sep 04, 2026
View on SEC Insider profile
Estimated value-$193kShares × reported price
Shares traded72.6k$2.66 per share
Holdings after2.29MDirect
% of reported position traded3.07%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 2,367,206 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

ALEC price since this filing

Daily closing prices, with the filing date and available return windows
ALEC · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -37.4%1w ago -2.8%1d ago +10.6%
Returns since7d -13.0%30d -26.4%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001193125-26-383857
Common Stock
Transaction date
Sep 03, 2026
Filed Sep 04, 2026, 09:45 PM · 1d delay
Shares
72,606 sh
$2.66 per share
Estimated value
-$193k
Computed from shares × price
Holdings after
2,294,600 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership
Filing-only score

+10 points

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • timely_filing+4 points

    reporting_delay_days = 1

    Filing reported within two business days of the transaction.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Executive Officer

Officer YesDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

  2. F2

    The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.49 to $2.75. Full information regarding the number of shares sold at…

  3. F3

    The reported securities are held directly by The Rosenthal Family Revocable Trust Dated November 4, 1994, as restated on June 9, 1999, for which the Reporting Person serves as trustee.

  4. F4

    The reported securities are held directly by the Adi Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.

  5. F5

    The reported securities are held directly by the Noam Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.

  6. F6

    The reported securities are held directly by the Shani Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.

Original filing · 0001193125-26-383857
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