ANAB ANAPTYSBIO, INC
Price Chart
Executive Summary
Dennis Mulroy, an officer of AnaptysBio, filed a Form 144 notice of intent to sell 10,000 shares of common stock, valued at approximately $593,008 based on the filing date price. This follows three prior sales in the same week totaling 35,467 shares for ~$2.16M, indicating a concentrated selling pattern by an insider.
Actionable Insight
This is the fourth insider sale filing from the same officer within one week, signaling a routine option-exercise/cash-out cycle but at an elevated frequency. For a $1.5B biotech with no disclosed near-term catalyst, the concentrated selling is a modest negative signal. Historical reports on ANAB have shown poor T+20 performance (avg -9.4%), suggesting caution. Monitor for additional Form 4 filings or a material change in corporate outlook that could explain the selling.
Key Facts
- Form 144 filed on 2026-05-22 by officer Dennis Mulroy
- Proposed sale of 10,000 shares of common stock
- Estimated value: ~$593,008 at market price on filing date
- Shares acquired via stock option exercise on 05/22/2026 for cash
- Three prior open-market sales by Mulroy in the preceding week: 15,467 shares on 05/21 ($928k), 10,000 on 05/19 ($599k), 10,000 on 05/15 ($633k)
- Cumulative insider sales by Mulroy in the past week: ~45,467 shares for ~$2.75M
Financial Impact
Proposed additional sale of ~$593k; combined week of insider selling totals ~$2.75M against a $1.5B market cap
Risk Factors
- Insider selling may indicate lack of confidence in near-term share appreciation
- Historical T+20 performance on ANAB filings has been negative across several prior reads
- Biotech sector volatility could amplify any negative sentiment from insider sales
Market Snapshot
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001950047-26-004947 |
| Document: 0001950047-26-004947-index.html | 0001950047-26-004947 |
| Document: 0001950047-26-004947.txt | 0001950047-26-004947 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
|
Jun 11, 2026
1d ago
|
144
| $54.24 awaiting T+1 | awaiting T+1 | — | $56.07 (−3.38%) |
|
Jun 10, 2026
2d ago
|
144
| $51.96 awaiting T+1 | awaiting T+1 | — | $56.07 (−7.91%) |
|
Jun 8, 2026
4d ago
|
144
| $51.38 awaiting T+1 | awaiting T+1 | — | $56.07 (−9.14%) |
|
Jun 5, 2026
7d ago
|
144
| $50.58 awaiting T+1 | awaiting T+1 | — | $56.07 (−10.85%) |
|
Jun 5, 2026
7d ago
|
144
| $51.33 awaiting T+1 | awaiting T+1 | — | $56.07 (−9.23%) |
|
Jun 3, 2026
9d ago
|
144
| $51.67 $50.37 | ▲ +2.52% | ▼ −0.08% | $56.07 (−8.52%) |
|
Jun 1, 2026
11d ago
|
144
| $51.26 $51.24 | ▲ +0.04% | ▼ −0.68% | $56.07 (−9.38%) |
|
May 29, 2026
14d ago
|
8-K
| $53.14 $51.26 | ▼ −3.54% | ▼ −3.69% | $56.07 (+5.51%) |
|
May 28, 2026
15d ago
|
144
| $55.67 $53.14 | ▼ −4.54% | ▼ −4.80% | $56.07 (+0.72%) |
|
May 27, 2026
16d ago
|
144
| $57.02 $55.67 | ▲ +2.37% | ▲ +2.61% | $56.07 (+1.67%) |
US Market Status
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