Monitor for actual execution of the sale on Form 4. If completed, this would be the largest insider sale at MTSI in recent months, potentially signaling peak valuation concerns from a board-level insider. The stock's recent strong performance may attract profit-taking; watch for follow-on selling by other insiders or Summit Partners.
Price Chart
Executive Summary
Director Peter Chung filed a Form 144 notice to sell 43,268 shares of MTSI common stock, with an estimated aggregate market value of approximately $16.4 million based on the filing date. This is a large sale relative to typical insider activity at MTSI (recent 30-day insider sales total only $614K), and the seller is a director and a representative of Summit Partners, a significant institutional shareholder. The filing signals intent to sell, not a completed transaction, but the size and insider status warrant attention.
Key Facts
- Director Peter Chung (Summit Partners) filed Form 144 to sell 43,268 shares of MTSI common stock.
- Estimated aggregate market value of proposed sale: approximately $16.4 million.
- Recent 30-day insider activity at MTSI totaled only $614K in sales, making this a notably large proposed sale.
- Shares were acquired upon vesting of restricted stock from 11/15/2012 through 03/04/2023.
- The sale is proposed for execution on or after 05/14/2026 via Morgan Stanley Smith Barney.
Financial Impact
Proposed sale of 43,268 shares valued at ~$16.4M, representing a significant insider monetization event.
Risk Factors
- Large insider sale could signal perceived overvaluation or reduced conviction in near-term prospects.
- Summit Partners is a major shareholder; a director's large sale may precede broader distribution by the fund.
- Form 144 is only an intent to sell; the sale may not occur, reducing immediate bearish pressure.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001950047-26-004560 |
| Document: 0001950047-26-004560-index.html | 0001950047-26-004560 |
| Document: 0001950047-26-004560.txt | 0001950047-26-004560 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 6, 2026 8w ago | 8-K | $301.64 $259.95 | ▼ −13.82% | ▼ −14.42% | $321.60 (+6.62%) |
Jun 9, 2026 16w ago | Press Release | $358.72 $304.82 | ▼ −15.03% | ▼ −16.47% | $321.60 (−10.35%) |
May 29, 2026 18w ago | 144 | $353.79 $380.37 | ▲ +7.51% | ▲ +8.81% | $321.60 (−9.10%) |
May 27, 2026 18w ago | 144 | $400.66 $390.19 | ▼ −2.61% | ▼ −0.71% | $321.60 (−19.73%) |
May 18, 2026 19w ago | Insider Cluster | $358.98 $367.11 | ▲ +2.26% | ▲ +1.28% | $321.60 (−10.41%) |
May 18, 2026 19w ago | Insider Cluster | $358.98 $367.11 | ▲ +2.26% | ▲ +1.28% | $321.60 (−10.41%) |
May 18, 2026 19w ago | Insider Cluster | $358.98 $367.11 | ▲ +2.26% | ▲ +1.28% | $321.60 (−10.41%) |
May 18, 2026 19w ago | Insider Cluster | $380.45 $395.70 | ▲ +4.01% | ▲ +3.68% | $321.60 (−15.47%) |
May 18, 2026 19w ago | Insider Cluster | $358.98 $367.11 | ▲ +2.26% | ▲ +1.28% | $321.60 (−10.41%) |
May 15, 2026 20w ago | Insider Cluster | $356.25 $368.32 | ▲ +3.39% | ▲ +1.81% | $321.60 (−9.73%) |
US Market Status
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