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Supermicro insider trading
Transactions in SMCI stock reported by Supermicro executives, directors and large holders on SEC Form 4 over the last 120 days. Last update 2026-10-03.
$15.4Mopen-market sales (400,000 shares, 2 insiders)
$0open-market purchases (0 shares, 0 insiders)
38Form 4 filings
Insiders
Charles Liang President and CEO, Director, 10% owner Sold $7.7M Liang Chiu-Chu Sara Liu Director, 10% owner Sold $7.7M Jin Xiao Sr. Corporate VP, Engineering 6 other transactions David E Weigand SVP, Chief Financial Officer 16 other transactions Matthew Thauberger Chief Revenue Officer 6 other transactions Vikranth Malyala SVP, Chief Business Officer 16 other transactions Kenneth Cheung SVP, Chief Accounting Officer 6 other transactions Robert L Blair Director 1 other transaction Scott Angel Director 1 other transaction Judy L. Lin Director 1 other transaction Tally C Liu Director 1 other transaction Susan Mogensen Director 1 other transaction
All transactions
| Date | Insider | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|
| Sep 4, 2026 | Charles Liang President and CEO, Director, 10% owner | Open-market sale 10b5-1 plan indirect | 100,000 | $40.00 | $4.0M | Form 4 ↗ |
| Sep 4, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Open-market sale 10b5-1 plan | 100,000 | $40.00 | $4.0M | Form 4 ↗ |
| Sep 3, 2026 | Charles Liang President and CEO, Director, 10% owner | Open-market sale 10b5-1 plan indirect | 42,565 | $36.60 | $1.6M | Form 4 ↗ |
| Sep 3, 2026 | Charles Liang President and CEO, Director, 10% owner | Open-market sale 10b5-1 plan indirect | 57,435 | $37.62 | $2.2M | Form 4 ↗ |
| Sep 3, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Open-market sale 10b5-1 plan | 42,565 | $36.60 | $1.6M | Form 4 ↗ |
| Sep 3, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Open-market sale 10b5-1 plan | 57,435 | $37.62 | $2.2M | Form 4 ↗ |
| Aug 17, 2026 | Jin Xiao Sr. Corporate VP, Engineering | Option or RSU exercise | 4,000 | — | — | Form 4 ↗ |
| Aug 17, 2026 | Jin Xiao Sr. Corporate VP, Engineering | Shares withheld for tax | 1,436 | $38.28 | — | Form 4 ↗ |
| Aug 17, 2026 | David E Weigand SVP, Chief Financial Officer | Option or RSU exercise | 6,500 | — | — | Form 4 ↗ |
| Aug 17, 2026 | David E Weigand SVP, Chief Financial Officer | Shares withheld for tax | 3,308 | $38.28 | — | Form 4 ↗ |
| Aug 17, 2026 | Matthew Thauberger Chief Revenue Officer | Option or RSU exercise | 2,250 | — | — | Form 4 ↗ |
| Aug 17, 2026 | Matthew Thauberger Chief Revenue Officer | Shares withheld for tax | 1,145 | $38.28 | — | Form 4 ↗ |
| Aug 17, 2026 | Vikranth Malyala SVP, Chief Business Officer | Option or RSU exercise | 6,000 | — | — | Form 4 ↗ |
| Aug 17, 2026 | Vikranth Malyala SVP, Chief Business Officer | Shares withheld for tax | 3,053 | $38.28 | — | Form 4 ↗ |
| Aug 17, 2026 | Charles Liang President and CEO, Director, 10% owner | Option or RSU exercise indirect | 3,650 | — | — | Form 4 ↗ |
| Aug 17, 2026 | Charles Liang President and CEO, Director, 10% owner | Shares withheld for tax indirect | 1,970 | $38.28 | — | Form 4 ↗ |
| Aug 17, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Option or RSU exercise | 3,650 | — | — | Form 4 ↗ |
| Aug 17, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Shares withheld for tax | 1,970 | $38.28 | — | Form 4 ↗ |
| Aug 17, 2026 | Kenneth Cheung SVP, Chief Accounting Officer | Option or RSU exercise | 2,250 | — | — | Form 4 ↗ |
| Aug 17, 2026 | Kenneth Cheung SVP, Chief Accounting Officer | Shares withheld for tax | 808 | $38.28 | — | Form 4 ↗ |
| Aug 10, 2026 | Matthew Thauberger Chief Revenue Officer | Option or RSU exercise | 740 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Matthew Thauberger Chief Revenue Officer | Shares withheld for tax | 377 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Matthew Thauberger Chief Revenue Officer | Option or RSU exercise | 430 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Matthew Thauberger Chief Revenue Officer | Shares withheld for tax | 219 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Vikranth Malyala SVP, Chief Business Officer | Option or RSU exercise | 2,110 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Vikranth Malyala SVP, Chief Business Officer | Shares withheld for tax | 1,074 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Vikranth Malyala SVP, Chief Business Officer | Option or RSU exercise | 1,138 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Vikranth Malyala SVP, Chief Business Officer | Shares withheld for tax | 580 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Jin Xiao Sr. Corporate VP, Engineering | Option or RSU exercise | 1,970 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Jin Xiao Sr. Corporate VP, Engineering | Shares withheld for tax | 707 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Jin Xiao Sr. Corporate VP, Engineering | Option or RSU exercise | 1,024 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Jin Xiao Sr. Corporate VP, Engineering | Shares withheld for tax | 368 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Kenneth Cheung SVP, Chief Accounting Officer | Option or RSU exercise | 1,250 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Kenneth Cheung SVP, Chief Accounting Officer | Shares withheld for tax | 449 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Kenneth Cheung SVP, Chief Accounting Officer | Option or RSU exercise | 3,429 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Kenneth Cheung SVP, Chief Accounting Officer | Shares withheld for tax | 1,231 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Option or RSU exercise | 2,110 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Shares withheld for tax | 1,139 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Option or RSU exercise | 1,024 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Shares withheld for tax | 553 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Charles Liang President and CEO, Director, 10% owner | Option or RSU exercise indirect | 2,110 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Charles Liang President and CEO, Director, 10% owner | Shares withheld for tax indirect | 1,139 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | Charles Liang President and CEO, Director, 10% owner | Option or RSU exercise indirect | 1,024 | — | — | Form 4 ↗ |
| Aug 10, 2026 | Charles Liang President and CEO, Director, 10% owner | Shares withheld for tax indirect | 553 | $31.46 | — | Form 4 ↗ |
| Aug 10, 2026 | David E Weigand SVP, Chief Financial Officer | Option or RSU exercise | 1,480 | — | — | Form 4 ↗ |
| Aug 10, 2026 | David E Weigand SVP, Chief Financial Officer | Shares withheld for tax | 754 | $31.46 | — | Form 4 ↗ |
| Jul 1, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Option or RSU exercise | 830 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Shares withheld for tax | 448 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Option or RSU exercise | 510 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Shares withheld for tax | 276 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Option or RSU exercise | 273 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Liang Chiu-Chu Sara Liu Director, 10% owner | Shares withheld for tax | 148 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Option or RSU exercise | 9,380 | — | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Shares withheld for tax | 4,773 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Option or RSU exercise | 5,110 | — | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Shares withheld for tax | 2,600 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Option or RSU exercise | 1,080 | — | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Shares withheld for tax | 550 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Option or RSU exercise | 2,991 | — | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Shares withheld for tax | 1,522 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Option or RSU exercise | 1,164 | — | — | Form 4 ↗ |
| Jul 1, 2026 | David E Weigand SVP, Chief Financial Officer | Shares withheld for tax | 593 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | Charles Liang President and CEO, Director, 10% owner | Option or RSU exercise indirect | 830 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Charles Liang President and CEO, Director, 10% owner | Shares withheld for tax indirect | 448 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | Charles Liang President and CEO, Director, 10% owner | Option or RSU exercise indirect | 510 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Charles Liang President and CEO, Director, 10% owner | Shares withheld for tax indirect | 276 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | Charles Liang President and CEO, Director, 10% owner | Option or RSU exercise indirect | 273 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Charles Liang President and CEO, Director, 10% owner | Shares withheld for tax indirect | 148 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | Vikranth Malyala SVP, Chief Business Officer | Option or RSU exercise | 4,600 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Vikranth Malyala SVP, Chief Business Officer | Shares withheld for tax | 2,341 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | Vikranth Malyala SVP, Chief Business Officer | Option or RSU exercise | 1,220 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Vikranth Malyala SVP, Chief Business Officer | Shares withheld for tax | 621 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | Vikranth Malyala SVP, Chief Business Officer | Option or RSU exercise | 1,413 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Vikranth Malyala SVP, Chief Business Officer | Shares withheld for tax | 719 | $27.65 | — | Form 4 ↗ |
| Jul 1, 2026 | Vikranth Malyala SVP, Chief Business Officer | Option or RSU exercise | 507 | — | — | Form 4 ↗ |
| Jul 1, 2026 | Vikranth Malyala SVP, Chief Business Officer | Shares withheld for tax | 258 | $27.65 | — | Form 4 ↗ |
| Jun 30, 2026 | Robert L Blair Director | Option or RSU exercise | 5,383 | — | — | Form 4 ↗ |
| Jun 30, 2026 | Scott Angel Director | Option or RSU exercise | 5,383 | — | — | Form 4 ↗ |
| Jun 30, 2026 | Judy L. Lin Director | Option or RSU exercise | 5,383 | — | — | Form 4 ↗ |
| Jun 30, 2026 | Tally C Liu Director | Option or RSU exercise | 2,691 | — | — | Form 4 ↗ |
| Jun 30, 2026 | Susan Mogensen Director | Option or RSU exercise | 5,383 | — | — | Form 4 ↗ |
| Jun 17, 2026 | Vikranth Malyala SVP, Chief Business Officer | Option or RSU exercise | 7,500 | — | — | Form 4 ↗ |
| Jun 17, 2026 | Vikranth Malyala SVP, Chief Business Officer | Shares withheld for tax | 2,825 | $27.78 | — | Form 4 ↗ |
| Jun 17, 2026 | David E Weigand SVP, Chief Financial Officer | Option or RSU exercise | 5,000 | — | — | Form 4 ↗ |
| Jun 17, 2026 | David E Weigand SVP, Chief Financial Officer | Shares withheld for tax | 1,794 | $27.78 | — | Form 4 ↗ |
Source: SEC EDGAR, Supermicro Form 4 filings. Values are shares × reported price for open-market trades. Insider trades are reported facts, not recommendations. Not investment advice. See the tracker for how to read the codes.