The Form 144 is a modest director sale that alone is not a strong signal, but it adds to a pattern of insider selling ($9.2M in 30d). Monitor for actual Form 4 filings to confirm execution, and watch next earnings for any fundamental deterioration that might explain the insider selling pattern.
Price Chart
Executive Summary
Director Rachel Lam filed a Form 144 notice of intent to sell 10,000 shares of Magnite common stock, with an estimated aggregate market value of approximately $241,572. The shares were acquired through restricted stock vesting in 2021 and 2025. This is a relatively small sale relative to the company's $3.5B market cap, but it comes amid a backdrop of elevated insider selling ($9.2M in the past 30 days). The filing signals intent to sell, not a completed transaction, and the dollar amount is modest for a director, limiting its bearish signal strength.
Key Facts
- Director Rachel Lam filed Form 144 to sell 10,000 shares of MGNI common stock.
- Estimated aggregate market value of the proposed sale is $241,572.
- Shares were acquired via restricted stock vesting on 06/05/2025 (6,564 shares) and 06/28/2021 (3,436 shares).
- The company's market cap is approximately $3.5B, making this sale ~0.007% of market cap.
- Recent insider activity (30d) shows 4 sells totaling $9.2M, indicating a pattern of insider selling.
Financial Impact
Proposed sale of 10,000 shares valued at ~$241,572, representing a small fraction of the company's $3.5B market cap.
Risk Factors
- Insider selling pattern may indicate lack of confidence ahead of upcoming earnings or material news.
- Form 144 is only an intent to sell; the actual sale may not occur, reducing the signal's reliability.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001950047-26-007869 |
| Document: 0001950047-26-007869-index.html | 0001950047-26-007869 |
| Document: 0001950047-26-007869.txt | 0001950047-26-007869 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 11, 2026 22d ago | Insider Cluster | $23.77 $23.84 | ▲ +0.29% | ▲ +0.74% | $25.44 (+7.03%) |
Sep 10, 2026 22d ago | Press Release | $23.55 $23.77 | ▲ +0.93% | ▲ +0.08% | $25.44 (+8.03%) |
Sep 10, 2026 23d ago | Insider Cluster | $23.55 $23.77 | ▲ +0.93% | ▲ +0.08% | $25.44 (+8.03%) |
Sep 3, 2026 4w ago | Insider Cluster | $24.63 $24.14 | ▼ −1.99% | ▼ −1.60% | $25.44 (+3.29%) |
Aug 12, 2026 7w ago | Insider Cluster | $24.34 $24.58 | ▲ +0.99% | ▲ +0.29% | $25.44 (+4.52%) |
Aug 12, 2026 7w ago | Insider Cluster | $24.34 $24.58 | ▼ −0.99% | ▼ −0.29% | $25.44 (−4.52%) |
Aug 12, 2026 7w ago | Insider Cluster | $24.34 $24.58 | ▼ −0.99% | ▼ −0.29% | $25.44 (−4.52%) |
Aug 10, 2026 7w ago | 144 | $24.30 $24.34 | ▲ +0.16% | ▼ −0.09% | $25.44 (+4.69%) |
Aug 7, 2026 8w ago | Insider Cluster | $24.21 $24.30 | ▼ −0.37% | ▼ −0.69% | $25.44 (−5.08%) |
Aug 7, 2026 8w ago | Insider Cluster | $24.21 $24.30 | ▲ +0.37% | ▲ +0.69% | $25.44 (+5.08%) |
US Market Status
Subscribe to SecBot
Get Real-Time SEC Filing Intelligence
Comprehensive SEC filing analysis delivered the moment filings hit EDGAR. Sentiment scoring, impact analysis, and actionable insights for every material event.
Try SecBot Free Coming soon: SecBot Pro with alerts, watchlists, and API access