ANAB ANAPTYSBIO, INC

BEARISH Impact: 5/10 144
Horizon days Filed Jun 5, 2026 Processed 9d 11h ago SEC 0001950047-26-005723
Form 144 — notice of proposed sale of securities

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Executive Summary

Dennis Mulroy, an officer of AnaptysBio, filed a Form 144 on June 5, 2026, indicating intent to sell 22,491 shares of common stock valued at approximately $1.15 million. The filing also reveals a pattern of recent sales totaling over 160,000 shares in the prior two weeks, suggesting a sustained insider selling campaign rather than a one-off liquidity event.

Actionable Insight

The sustained selling by an officer over multiple weeks is a bearish signal, especially given the historical underperformance of prior bullish calls on ANAB (T+20 win rate 33%). Monitor for additional Form 4 filings and any upcoming corporate events (earnings, pipeline updates) that could explain the selling. The stock's high analyst bullishness (94% buy ratings) contrasts with insider behavior, creating a potential divergence to watch.

Key Facts

  • Officer Dennis Mulroy filed Form 144 to sell 22,491 shares valued at ~$1.15 million.
  • The filing also discloses 13 prior sales between May 15 and June 4, 2026, totaling ~160,422 shares for ~$8.7 million.
  • The proposed sale is attributed to a stock option exercise, but the aggregate selling pattern is substantial.
  • Market cap is ~$1.5B, so the total disclosed sales (~$9.9M) represent ~0.66% of market cap.
  • No other insider activity reported in the last 30 days per market data snapshot.

Financial Impact

Total disclosed insider sales of ~$9.9 million over the past three weeks, with the latest 144 adding ~$1.15 million.

insider selling volumedilution from option exercise

Risk Factors

  • Form 144 is an intent to sell; the sale may not be executed, but the pattern of recent completed sales is confirmed.
  • The selling could be for personal diversification or tax planning, not necessarily a reflection of company outlook.
  • High analyst consensus may already be priced in, and insider selling could precede negative news.

Market Snapshot

Exchange
Nasdaq
Sector
Pharmaceutical Preparations
Analyst Consensus
94% bullish (17 analysts)

Documents Analyzed

This report is based on 3 SEC documents filed with EDGAR.

DocumentAccession Number
144 Filing (Primary)0001950047-26-005723
Document: 0001950047-26-005723-index.html0001950047-26-005723
Document: 0001950047-26-005723.txt0001950047-26-005723
17 reports for ANAB
Performance horizon
88% Hit rate 7 of 8 directional calls best @ T+60▲ +41.26%Mar 3, 2026
Filters
Rows
Reports for ANAB — sortable, filterable
Type Now
Jun 11, 2026
3d ago
144
BEARISH ★ 6/10
$54.24 awaiting T+1awaiting T+1$56.07 (−3.38%)
Jun 10, 2026
4d ago
144
BEARISH ★ 5/10
$51.96 awaiting T+1awaiting T+1$56.07 (−7.91%)
Jun 8, 2026
6d ago
144
BEARISH ★ 5/10
$51.38 awaiting T+1awaiting T+1$56.07 (−9.14%)
Jun 5, 2026
9d ago
144
BEARISH ★ 5/10
$50.58 awaiting T+1awaiting T+1$56.07 (−10.85%)
Jun 5, 2026
9d ago
144
BEARISH ★ 5/10
$51.33 awaiting T+1awaiting T+1$56.07 (−9.23%)
Jun 3, 2026
11d ago
144
BEARISH ★ 5/10
$51.67 $50.37▲ +2.52%▼ −0.08%$56.07 (−8.52%)
Jun 1, 2026
13d ago
144
BEARISH ★ 5/10
$51.26 $51.24▲ +0.04%▼ −0.68%$56.07 (−9.38%)
May 29, 2026
16d ago
8-K
NEUTRAL ★ 2/10
$53.14 $51.26▼ −3.54%▼ −3.69%$56.07 (+5.51%)
May 28, 2026
17d ago
144
NEUTRAL ★ 3/10
$55.67 $53.14▼ −4.54%▼ −4.80%$56.07 (+0.72%)
May 27, 2026
18d ago
144
BEARISH ★ 6/10
$57.02 $55.67▲ +2.37%▲ +2.61%$56.07 (+1.67%)
Showing 10 of 17

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