SMCI · Insider Trading
Super Micro Computer, Inc. Common Stock
Every open-market purchase and sale reported by SMCI officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-09 | Liang Chiu-Chu Sara Liu | Director | Sell | −100,000 | −$4.50M |
| 2026-10-09 | Charles Liang | President and CEO | Sell | −100,000 | −$4.50M |
| 2026-09-08 | Liang Chiu-Chu Sara Liu | Director | Sell | −200,000 | −$7.72M |
| 2026-09-08 | Charles Liang | President and CEO | Sell | −200,000 | −$7.72M |
| 2026-08-31 | David E Weigand | SVP, Chief Financial Officer | A | — | — |
| 2026-08-31 | Vikranth Malyala | SVP, Chief Business Officer | A | — | — |
| 2026-08-31 | Jin Xiao | Sr. Corporate VP, Engineering | A | — | — |
| 2026-08-19 | David E Weigand | SVP, Chief Financial Officer | MIXED | +3,192 | −$126.63K |
| 2026-08-19 | Charles Liang | President and CEO | MIXED | +1,680 | −$75.41K |
| 2026-08-19 | Jin Xiao | Sr. Corporate VP, Engineering | MIXED | +2,564 | −$54.97K |
| 2026-08-19 | Kenneth Cheung | SVP, Chief Accounting Officer | MIXED | +1,442 | −$30.93K |
| 2026-08-19 | Vikranth Malyala | SVP, Chief Business Officer | MIXED | +2,947 | −$116.87K |
| 2026-08-19 | Liang Chiu-Chu Sara Liu | Director | MIXED | +1,680 | −$75.41K |
| 2026-08-19 | Matthew Thauberger | Chief Revenue Officer | MIXED | +1,105 | −$43.83K |
| 2026-08-18 | Scott Angel | Director | A | — | — |
| 2026-08-18 | Robert L Blair | Director | A | — | — |
| 2026-08-18 | Susan Mogensen | Director | A | — | — |
| 2026-08-18 | Matthew Thauberger | Chief Revenue Officer | A | — | — |
| 2026-08-18 | Tally C Liu | Director | A | — | — |
| 2026-08-18 | Judy L. Lin | Director | A | — | — |
| 2026-08-18 | Sherman Tuan | Director | A | — | — |
| 2026-08-12 | Jin Xiao | Sr. Corporate VP, Engineering | MIXED | +1,919 | −$33.82K |
| 2026-08-12 | Matthew Thauberger | — | MIXED | +574 | −$18.75K |
| 2026-08-12 | Kenneth Cheung | SVP, Chief Accounting Officer | MIXED | +2,999 | −$52.85K |
| 2026-08-12 | David E Weigand | SVP, Chief Financial Officer | MIXED | +726 | −$23.72K |
| 2026-08-12 | Liang Chiu-Chu Sara Liu | Director | MIXED | +1,442 | −$53.23K |
| 2026-08-12 | Vikranth Malyala | SVP, Chief Business Officer | MIXED | +1,594 | −$52.03K |
| 2026-08-12 | Charles Liang | President and CEO | MIXED | +1,442 | −$53.23K |
| 2026-07-02 | Susan Mogensen | Director | M | +5,383 | — |
| 2026-07-02 | Tally C Liu | Director | M | +2,691 | — |
| 2026-07-02 | David E Weigand | SVP, Chief Financial Officer | MIXED | +9,687 | −$277.55K |
| 2026-07-02 | Judy L. Lin | Director | M | +5,383 | — |
| 2026-07-02 | Vikranth Malyala | SVP, Chief Business Officer | MIXED | +3,801 | −$108.91K |
| 2026-07-02 | Robert L Blair | Director | M | +5,383 | — |
| 2026-07-02 | Charles Liang | President and CEO | MIXED | +741 | −$24.11K |
| 2026-07-02 | Liang Chiu-Chu Sara Liu | Director | MIXED | +741 | −$24.11K |
| 2026-07-02 | Scott Angel | Director | M | +5,383 | — |
| 2026-06-12 | Kenneth Cheung | SVP, Chief Accounting Officer | A | — | — |
| 2026-05-28 | Liang Chiu-Chu Sara Liu | Director | G | −340,000 | — |
| 2026-05-28 | Charles Liang | President and CEO | G | −340,000 | — |
| 2026-05-12 | Kenneth Cheung | SVP, Chief Accounting Officer | MIXED | +801 | −$15.88K |
| 2026-05-12 | Charles Liang | President and CEO | MIXED | +2,863 | −$118.67K |
| 2026-05-12 | Liang Chiu-Chu Sara Liu | Director | MIXED | +2,863 | −$118.67K |
| 2026-05-12 | Jin Xiao | Sr. Corporate VP, Engineering | MIXED | +3,890 | −$77.04K |
| 2026-05-12 | Don W Clegg | SVP, Worldwide Sales | MIXED | +1,481 | −$29.32K |
| 2026-05-12 | David E Weigand | SVP, Chief Financial Officer | MIXED | +2,673 | −$52.95K |
| 2026-03-12 | Jin Xiao | Sr. Corporate VP, Engineering | — | — | — |
| 2026-03-03 | Liang Chiu-Chu Sara Liu | Director | M | +20,980 | +$88.85K |
| 2026-03-03 | Charles Liang | President and CEO | M | +20,980 | +$88.85K |
| 2026-02-19 | David E Weigand | SVP, Chief Financial Officer | MIXED | +4,167 | −$70.25K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Liang Chiu-Chu Sara Liu | Director | 65,758,640 | $2.08B |
| Charles Liang | President and CEO | 25,670,026 | $811.94M |
| Yih-Shyan Wally Liaw | Director | 15,278,712 | $483.27M |
| Tally C Liu | Director | 288,738 | $9.13M |
| Sherman Tuan | Director | 207,156 | $6.55M |
| Jin Xiao | Sr. Corporate VP, Engineering | 194,639 | $6.16M |
| David E Weigand | SVP, Chief Financial Officer | 134,730 | $4.26M |
| George Kao | SVP, OPERATIONS | 134,691 | $4.26M |
| Kenneth Cheung | SVP, Chief Accounting Officer | 64,580 | $2.04M |
| Judy L. Lin | Director | 60,323 | $1.91M |
| Don W Clegg | SVP, Worldwide Sales | 49,713 | $1.57M |
| Vikranth Malyala | SVP, Chief Business Officer | 47,877 | $1.51M |
| Susan Mogensen | Director | 8,663 | $274.01K |
| Matthew Thauberger | Chief Revenue Officer | 7,632 | $241.40K |
| Scott Angel | Director | 7,055 | $223.15K |
| Robert L Blair | Director | 6,963 | $220.24K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the SMCI quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.