ALEC CLUSTER SEC Filing Analysis

Latest settled — T+20d ⚠ clustered

ALEC ▼ -8.60% at T+20d

SHORT call ✓ call won +8.60% · α vs SPY +0.66% · entry $2.21 → $2.02

Next anchor: T+60d in 5d

Currently $2.06 · +6.79% from $2.21 entry (call sign-flipped)

Entry anchored
Feb 27, 03:59 PM ET
via Databento tick

T+1d

-4.52%

call +4.52% · α +3.61%

$2.11

settled 3mo ago

T+5d

-0.91%

call +0.91% · α -0.30%

$2.19

settled 3mo ago

T+20d

-8.60%

call +8.60% · α +0.66%

$2.02

settled 8w ago

T+60d

—

call — · α —

—

in 5d

Price Chart

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Executive Summary

Multiple C-suite executives at Alector, Inc. (ALEC) sold shares in the past week, including CEO Arnon Rosenthal and CFO Neil Lindsay Berkley, realizing a combined total of approximately $244,000 in open-market transactions. The sales represent a coordinated cluster of insider selling by top leadership, though the total value remains small relative to the company's $244M market cap.

Key Financial Metrics

Direction

selling

Total Value

$271.1K

Insiders

3

Actionable Insight

Monitor for upcoming earnings or pipeline updates; this level of C-suite selling may signal lack of confidence in near-term prospects, especially given the low stock price. Watch for further selling or any offsetting buy signals.

Key Facts

CEO Arnon Rosenthal sold 81,864 shares for $173,822 in open-market transactions.
CFO Neil Lindsay Berkley sold 29,649 shares for $62,954 in open-market transactions.
Principal Accounting Officer Grace Wong-Sarad sold 15,517 shares across three days for $34,348 total.
All transactions were open-market sales (Form 4 codes 'S'), indicating deliberate liquidity events.
Total value of the insider selling cluster: $271,122 over 7 days.

Financial Impact

$271,122 in insider sales over 7 days, representing 0.11% of ALEC's $244M market cap

insider sentimentshareholder confidencepotential dilution risk

Risk Factors

Insider selling by CEO and CFO can erode investor confidence, particularly in a small-cap biotech with no commercial revenue.
Proceeds from sales may indicate personal financial needs or broader concerns about company trajectory.

Market Snapshot

Exchange

Nasdaq

Documents Analyzed

This report is based on 1 SEC document filed with EDGAR.

Document	Accession Number
CONTEXT: Insider Cluster Data (5 trades, 7d window)	cluster-ALEC-1772578910982

4 reports for ALEC

T+1T+5T+20T+60

Track record builds as more directional reports settle.

Filters

Reports for ALEC — sortable, filterable
	Type				Now
May 7, 2026 13d ago	8-K BEARISH ★ 6/10	$2.10 $2.30	▼ −9.52%	▼ −8.06%	$2.06 (+1.90%)
Mar 12, 2026 9w ago	S-3 BEARISH ★ 7/10	$2.20 $2.05	▲ +6.82%	▲ +4.70%	$2.06 (+6.36%)
Mar 2, 2026 11w ago	Insider Cluster BEARISH ★ 5/10	$2.21 $2.19	▲ +0.91%	▼ −0.30%	$2.06 (+6.79%)
Feb 26, 2026 12w ago	Insider Cluster NEUTRAL ★ 3/10	$2.56 $1.98	▼ −22.66%	▼ −21.53%	$2.06 (−19.53%)

US Market Status

Market Open — Closes in 4h 38m

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