Semtech Corp (SMTC) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Sep 25, 2026.
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- Filings shown
- 17
- Open-market buys
- 0
- Open-market sells
- 19
Counts cover the 17 most recent Form 4 filings Tradune holds for SMTC (filed Jul 9 – Sep 25, 2026); the score below covers only the trailing 90 days (0 buys, 9 sells). No completed check of SMTC's Form 4 list on SEC EDGAR is on record yet; the latest SMTC filing Tradune holds was filed Sep 25, 2026. This is not guaranteed to be the complete record — see SMTC's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 13 filings Tradune holds for SMTC filed Jul 24 – Sep 25, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
9 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 8 sales· 12,683 sh
- checkbox disclosed
- On filings with the box not checked
- 1 sale· 5,321 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Paul V. Walsh Jr.Director | 0 | 3 | — | 1,500 | −$220,580 |
| Hong Q. HouPresident and CEO | 0 | 2 | — | 4,000 | −$557,420 |
| Rodolpho C. CardenutoDirector | 0 | 1 | — | 5,321 | −$877,978 |
| Asaf SilbersteinEVP and COO | 0 | 1 | — | 5,000 | −$750,000 |
| Julie Garcia RuehlDirector | 0 | 1 | — | 1,500 | −$217,500 |
| Mark LinEVP and CFO | 0 | 1 | — | 683 | −$109,212 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at SMTC
No open-market insider purchases (Form 4 code P) were reported for SMTC between Jul 9, 2026 and Sep 25, 2026. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 500 | $172.61 | 26,600 | −1.8% | Sep 23, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 5,321 | $165.00 | 0 | −100% | Sep 16, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 2,348 | — | 37,244 | +6.7% | Sep 10, 2026 |
| Tax withholding | 1,195 | $163.94 | 36,049 | −3.2% | Sep 10, 2026 |
| Open-market sale 10b5-1 box checked | 683 | $159.90 | 35,366 | −1.9% | Sep 10, 2026 |
| Option exercise Restricted Stock Unit | 2,348 | — | — | — | Sep 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 2,511 | — | 11,122 | +29% | Sep 10, 2026 |
| Tax withholding | 989 | $163.94 | 10,133 | −8.9% | Sep 10, 2026 |
| Option exercise Restricted Stock Unit | 2,511 | — | — | — | Sep 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 2,439 | — | 2,439 | — | Sep 10, 2026 |
| Tax withholding | 1,241 | $163.94 | 1,198 | −51% | Sep 10, 2026 |
| Option exercise Restricted Stock Unit | 2,439 | — | — | — | Sep 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 1,400 | — | 82,276 | +1.7% | Sep 10, 2026 |
| Tax withholding | 713 | $163.94 | 81,563 | −0.9% | Sep 10, 2026 |
| Option exercise Restricted Stock Unit | 1,400 | — | — | — | Sep 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 8,130 | — | 68,929 | +13% | Sep 10, 2026 |
| Tax withholding | 4,137 | $163.94 | 64,792 | −6.0% | Sep 10, 2026 |
| Option exercise Restricted Stock Unit | 8,130 | — | — | — | Sep 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 1,500 | $145.00 | 7,140 | −17% | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 2,000 | $138.71 | 60,799 | −3.2% | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 500 | $135.48 | 27,100 | −1.8% | Aug 19, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 5,000 | $150.00 | 88,862 (indirect) | −5.3% | Aug 17, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 2,000 | $140.00 | 62,799 | −3.1% | Aug 7, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 500 | $133.07 | 27,600 | −1.8% | Jul 22, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 3,000 | $145.04 | 93,862 (indirect) | −3.1% | Jul 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 2,000 | $133.00 | 64,799 | −3.0% | Jul 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 3,354 | $129.94 | 96,862 (indirect) | −3.3% | Jul 8, 2026 |
| Open-market sale 10b5-1 box checked | 588 | $127.61 | 101,616 (indirect) | −0.6% | Jul 8, 2026 |
| Open-market sale 10b5-1 box checked | 1,400 | $128.70 | 100,216 (indirect) | −1.4% | Jul 8, 2026 |
| Open-market sale 10b5-1 box checked | 437 | $124.19 | 104,925 (indirect) | −0.4% | Jul 8, 2026 |
| Open-market sale 10b5-1 box checked | 2,448 | $125.18 | 102,477 (indirect) | −2.3% | Jul 8, 2026 |
| Open-market sale 10b5-1 box checked | 273 | $126.60 | 102,204 (indirect) | −0.3% | Jul 8, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 1,132 | $129.32 | 9,743 | −10% | Jul 7, 2026 |
| Open-market sale 10b5-1 box checked | 1,132 | $130.48 | 8,611 | −12% | Jul 7, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to SMTC's (Sep 25, 2026).
Frequently asked about SMTC insider activity
How many insiders bought SMTC stock in these Form 4 filings?
No open-market purchases (Form 4 code P) of SMTC shares were reported by Semtech Corp insiders between Jul 9, 2026 and Sep 25, 2026. The 17 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for SMTC?
The most recent Form 4 on this page was filed by Paul V. Walsh Jr. (Director) on Sep 25, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market SMTC insider sale shown?
The largest open-market sale among the filings shown was 5,321 SMTC shares at $165.00 (about $877,978) by Rodolpho C. Cardenuto (Director) on Sep 16, 2026. Value is shares × the price reported on the Form 4; its Rule 10b5-1 box is not checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track SMTC insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.