144 ·Filed May 1, 2026
Form 144 — notice of proposed sale of securities
Actionable Insight ▼ Bearish
The insider's persistent selling warrants caution. Watch for further Form 144 or Form 4 filings; a cessation of sales could stabilize sentiment.
Final — all horizons settled through T+60d
MBX ▲ +101.68% at T+60d
SHORT call ✗ call lost -101.68% · α vs SPY -98.61% · entry $29.78 → $60.06
T+1d
-1.14%
call +1.14% · α +0.80%
$29.44
settled 6mo ago
T+5d
+16.55%
call -16.55% · α -14.21%
$34.71
settled 6mo ago
T+20d
+2.92%
call -2.92% · α +2.36%
$30.65
settled 5mo ago
T+60d
+101.68%
call -101.68% · α -98.61%
$60.06
settled 3mo ago
Price Chart
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Executive Summary
Former officer Richard Bartram files Form 144 to sell 5,000 MBX shares (~$159k), adding to 21,484 shares already sold in the prior two months. The consistent insider selling pattern raises concerns about confidence in the company's near-term outlook.
Key Facts
- Bartram Richard, a former officer, filed Form 144 to sell 5,000 shares of common stock.
- Estimated market value of proposed sale is $159,000.
- Sold 21,484 shares in three prior transactions since mid-March 2026.
- Total insider disposition over ~2 months: 26,484 shares.
Financial Impact
Proposed sale of 5,000 shares valued at ~$159k; cumulative insider sales ~$830k over 2 months.
Risk Factors
- Continued insider selling may signal weakening confidence in MBX's fundamentals.
- Potential negative market perception of insider distribution pattern.
Market Snapshot
Exchange
Nasdaq
Sector
Pharmaceutical Preparations
Analyst Consensus
87% bullish (15 analysts)
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001959173-26-003192 |
| Document: 0001959173-26-003192-index.html | 0001959173-26-003192 |
| Document: 0001959173-26-003192.txt | 0001959173-26-003192 |
27 reports for MBX
67% Hit rate @ T+1 Went positive at some point 7 of 9 best @ T+60▲ +85.57%
Filters
Rows
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 22, 2026 4d ago | 3 | $50.46 $48.50 | ▼ −3.88% | ▼ −3.36% | $50.29 (−0.34%) |
Oct 22, 2026 4d ago | 8-K | $50.46 $48.50 | ▼ −3.88% | ▼ −3.36% | $50.29 (−0.34%) |
Aug 27, 2026 8w ago | Press Release | $66.39 $63.00 | ▼ −5.11% | ▼ −4.88% | $50.29 (−24.25%) |
Aug 17, 2026 10w ago | 144 | $68.25 $66.52 | ▼ −2.53% | ▼ −1.86% | $50.29 (−26.32%) |
Aug 6, 2026 11w ago | 8-K | $67.11 $67.82 | ▲ +1.06% | ▲ +0.45% | $50.29 (−25.06%) |
Jun 12, 2026 19w ago | 8-K | $35.51 $38.98 | ▲ +9.77% | ▲ +8.01% | $50.29 (+41.62%) |
Jun 12, 2026 19w ago | Press Release | $35.51 $38.98 | ▲ +9.77% | ▲ +8.01% | $50.29 (+41.62%) |
Jun 11, 2026 19w ago | Institutional Cluster | $37.25 $35.51 | ▼ −4.67% | ▼ −5.21% | $50.29 (+35.01%) |
Jun 11, 2026 19w ago | Institutional Cluster | $37.25 $35.51 | ▼ −4.67% | ▼ −5.21% | $50.29 (+35.01%) |
Jun 10, 2026 19w ago | 144 | $30.99 $37.25 | ▲ +20.20% | ▲ +18.50% | $50.29 (+62.28%) |
Showing 10 of 27
US Market Status
Market Closed — Opens Tue (16h 38m)
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