Company insider dossier

Alector Inc insider intelligence

ALEC filings assessed for conviction, transaction quality, insider breadth, clustering, freshness, and price confirmation.

Terminal chart Weekly report Factor intelligence Healthcare Biotechnology Data API
13/100

Concentrated distribution

83/100 confidence
Exchange
NASDAQ
Sector
Healthcare
Industry
Biotechnology
Latest evidence
4 Sep 2026

Investment committee read

Concentrated distribution

Priced common-share disposals are concentrated enough to warrant review, but they are not treated as a standalone bearish forecast.

Review exposure and filing context

Evidence in favour

  • Participation spans 10 named insiders rather than one filing source.

Decision risks

  • Qualifying disposal events outnumber acquisitions, although disposals receive a lower directional weight.
Conviction13Concentrated distribution
Confidence83Deep evidence
Named insiders10participating in the tape
Controlled events10directional common-share events
Acquisition value$0normalized amount
Disposal value$529.1Knormalized amount

Price confirmation map

Weekly price with common-share events

Acquisitions and disposals are aligned to the nearest completed weekly bar.

3.322.722.121.520.92 Disposal · 4 Sep 2026 · $9.1KDisposal · 3 Sep 2026 · $193.5KDisposal · 3 Sep 2026 · $77.9KDisposal · 3 Sep 2026 · $13.8KDisposal · 2 Sep 2026 · $1.8KAcquisition · 19 Aug 2026 · Not reportedDisposal · 19 Aug 2026 · Not reportedAcquisition · 9 Jul 2026 · Not reportedAcquisition · 17 Jun 2026 · Not reportedAcquisition · 17 Jun 2026 · Not reportedAcquisition · 17 Jun 2026 · Not reportedAcquisition · 17 Jun 2026 · Not reportedAcquisition · 17 Jun 2026 · Not reportedAcquisition · 17 Jun 2026 · Not reportedAcquisition · 17 Jun 2026 · Not reportedDisposal · 3 Jun 2026 · $6.5KDisposal · 2 Jun 2026 · $172.2KDisposal · 2 Jun 2026 · $38.2KDisposal · 2 Jun 2026 · $11.3KAcquisition · 1 Jun 2026 · Not reportedDisposal · 16 Apr 2026 · $4.8K
Mar 2025Sep 2026
Weekly closeCommon-share acquisitionCommon-share disposal

Market confirmation

Price and trend context

Latest close
1.91 USD
One-week move
-10.7%
Four-week move
-19.1%
Fair-value gap
-42.7%
Trend signal
Inactive
Relative strength
-13.2

Directional balance

Controlled event mix

0.0%acquisition
Acquisition events
0
Disposal events
10
Net value
-$529.1K

Cadence

Twelve-week filing pressure

Volume shows attention. Controlled events determine direction.

029 Jun
106 Jul
013 Jul
020 Jul
027 Jul
003 Aug
010 Aug
217 Aug
024 Aug
531 Aug
007 Sep
014 Sep

Named participants

Insider conviction by person

ALTMEYER, MARKDirector500 events
DESOUZA, ERROL BDirector500 events
GAROFALO, ELIZABETH A.Director500 events
HAMMOND, PAULADirector500 events
LAVIGNE, LOUIS J JRDirector500 events
SCHELLER, RICHARD HDirector500 events
YAFFE, KRISTINEDirector500 events
BERKLEY, NEIL LINDSAYCFO & Chief Business Officer252 events
ROSENTHAL, ARNONDirector, Chief Executive Officer252 events
WONG-SARAD, GRACEPrincipal Accounting Officer176 events

Evidence quality

Security and transaction context

Common equity21
Equity compensation0
Options and derivatives7
Other securities0

Role architecture

Who is participating

Director15
Other executive7
CEO and chair4
Finance leadership2

Transaction evidence

Auditable ALEC filing ledger

Showing 1 to 28 of 28.

WONG-SARAD, GRACEPrincipal Accounting Officer
DisposalCommon equity
3625 sharesCommon Stock
$9.1KDirectional evidence
ROSENTHAL, ARNONDirector, Chief Executive Officer
DisposalCommon equity
72606 sharesCommon Stock
$193.5KDirectional evidence
BERKLEY, NEIL LINDSAYCFO & Chief Business Officer
DisposalCommon equity
29251 sharesCommon Stock
$77.9KDirectional evidence
WONG-SARAD, GRACEPrincipal Accounting Officer
DisposalCommon equity
5165 sharesCommon Stock
$13.8KDirectional evidence
WONG-SARAD, GRACEPrincipal Accounting Officer
DisposalCommon equity
656 sharesCommon Stock
$1.8KDirectional evidence
ROSENTHAL, ARNONDirector, Chief Executive Officer
AcquisitionCommon equity
350000 sharesCommon Stock
Not reportedContext evidence
ROSENTHAL, ARNONDirector, Chief Executive Officer
DisposalCommon equity
1050000 sharesCommon Stock
Not reportedContext evidence
WONG-SARAD, GRACEPrincipal Accounting Officer
AcquisitionCommon equity
20000 sharesCommon Stock
Not reportedContext evidence
ALTMEYER, MARKDirector
AcquisitionOptions and derivatives
9450 sharesStock Option (right to buy)
Not reportedContext evidence
ALTMEYER, MARKDirector
AcquisitionCommon equity
28700 sharesCommon Stock
Not reportedContext evidence
DESOUZA, ERROL BDirector
AcquisitionOptions and derivatives
9450 sharesStock Option (right to buy)
Not reportedContext evidence
DESOUZA, ERROL BDirector
AcquisitionCommon equity
28700 sharesCommon Stock
Not reportedContext evidence
GAROFALO, ELIZABETH A.Director
AcquisitionCommon equity
28700 sharesCommon Stock
Not reportedContext evidence
GAROFALO, ELIZABETH A.Director
AcquisitionOptions and derivatives
9450 sharesStock Option (right to buy)
Not reportedContext evidence
HAMMOND, PAULADirector
AcquisitionCommon equity
28700 sharesCommon Stock
Not reportedContext evidence
HAMMOND, PAULADirector
AcquisitionOptions and derivatives
9450 sharesStock Option (right to buy)
Not reportedContext evidence
LAVIGNE, LOUIS J JRDirector
AcquisitionOptions and derivatives
9450 sharesStock Option (right to buy)
Not reportedContext evidence
LAVIGNE, LOUIS J JRDirector
AcquisitionCommon equity
28700 sharesCommon Stock
Not reportedContext evidence
SCHELLER, RICHARD HDirector
AcquisitionCommon equity
28700 sharesCommon Stock
Not reportedContext evidence
SCHELLER, RICHARD HDirector
AcquisitionOptions and derivatives
9450 sharesStock Option (right to buy)
Not reportedContext evidence
YAFFE, KRISTINEDirector
AcquisitionCommon equity
28700 sharesCommon Stock
Not reportedContext evidence
YAFFE, KRISTINEDirector
AcquisitionOptions and derivatives
9450 sharesStock Option (right to buy)
Not reportedContext evidence
WONG-SARAD, GRACEPrincipal Accounting Officer
DisposalCommon equity
3475 sharesCommon Stock
$6.5KDirectional evidence
ROSENTHAL, ARNONDirector, Chief Executive Officer
DisposalCommon equity
87216 sharesCommon Stock
$172.2KDirectional evidence
BERKLEY, NEIL LINDSAYCFO & Chief Business Officer
DisposalCommon equity
19360 sharesCommon Stock
$38.2KDirectional evidence
WONG-SARAD, GRACEPrincipal Accounting Officer
DisposalCommon equity
5709 sharesCommon Stock
$11.3KDirectional evidence
SCHELLER, RICHARD HDirector
AcquisitionCommon equity
10833 sharesCommon Stock
Not reportedContext evidence
WONG-SARAD, GRACEPrincipal Accounting Officer
DisposalCommon equity
1820 sharesCommon Stock
$4.8KDirectional evidence

Reading the dossier

Direction and confidence are separate

Conviction

The 0 to 100 score classifies deduplicated priced common-share evidence. Fifty is balanced or non-directional.

Confidence

Confidence rises with controlled event depth, named-insider breadth, fresh evidence, normalized values, and a longer observation span.

Disposals

Selling is not treated as the mirror image of buying. It carries less directional weight because taxes, diversification, compensation, and planned transactions can all create sales.

Price confirmation

The market chart tests whether the filing thesis is being confirmed or rejected by price, fair-value position, relative strength, and the current trend state.

Independent market research for education. This classification is not investment advice, a recommendation, a forecast, or an execution instruction.

Evidence context