Supermicro (SMCI) — insider trading
Information Technology · NASDAQ
Supermicro (SMCI) has 184 reported SEC Form 4 insider transactions in our data, including 8 open-market sales among the most recent 100 (latest 2026-10-07).
Recent Form 4 transactions
Showing the 100 most recent of 184 recorded transactions. See all on SEC EDGAR →
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-07 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Open-market sale | 100,000 | $45.02 | $4.50M | Form 4 |
| 2026-10-07 | Liang Charles | Director, Officer (President and CEO), 10% owner | Open-market sale | 100,000 | $45.02 | $4.50M | Form 4 |
| 2026-09-04 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Open-market sale | 100,000 | $40.00 | $4.00M | Form 4 |
| 2026-09-04 | Liang Charles | Director, Officer (President and CEO), 10% owner | Open-market sale | 100,000 | $40.00 | $4.00M | Form 4 |
| 2026-09-03 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Open-market sale | 57,435 | $37.62 | $2.16M | Form 4 |
| 2026-09-03 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Open-market sale | 42,565 | $36.60 | $1.56M | Form 4 |
| 2026-09-03 | Liang Charles | Director, Officer (President and CEO), 10% owner | Open-market sale | 57,435 | $37.62 | $2.16M | Form 4 |
| 2026-09-03 | Liang Charles | Director, Officer (President and CEO), 10% owner | Open-market sale | 42,565 | $36.60 | $1.56M | Form 4 |
| 2026-08-27 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Grant / award / vesting (derivative) | 2,112 | — | $0 | Form 4 |
| 2026-08-27 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Grant / award / vesting (derivative) | 8,060 | — | $0 | Form 4 |
| 2026-08-27 | WEIGAND DAVID E | Officer (SVP, Chief Financial Officer) | Grant / award / vesting (derivative) | 24,093 | — | $0 | Form 4 |
| 2026-08-17 | Cheung Kenneth | Officer (SVP, Chief Accounting Officer) | Option exercise / conversion (derivative) | 2,250 | — | $0 | Form 4 |
| 2026-08-17 | Cheung Kenneth | Officer (SVP, Chief Accounting Officer) | Shares withheld for taxes / exercise cost | 808 | $38.28 | $30.9K | Form 4 |
| 2026-08-17 | Cheung Kenneth | Officer (SVP, Chief Accounting Officer) | Option exercise / conversion | 2,250 | — | — | Form 4 |
| 2026-08-17 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Option exercise / conversion (derivative) | 3,650 | — | $0 | Form 4 |
| 2026-08-17 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Shares withheld for taxes / exercise cost | 1,970 | $38.28 | $75.4K | Form 4 |
| 2026-08-17 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Option exercise / conversion | 3,650 | — | — | Form 4 |
| 2026-08-17 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion (derivative) | 3,650 | — | $0 | Form 4 |
| 2026-08-17 | Liang Charles | Director, Officer (President and CEO), 10% owner | Shares withheld for taxes / exercise cost | 1,970 | $38.28 | $75.4K | Form 4 |
| 2026-08-17 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion | 3,650 | — | — | Form 4 |
| 2026-08-17 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion (derivative) | 6,000 | — | $0 | Form 4 |
| 2026-08-17 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Shares withheld for taxes / exercise cost | 3,053 | $38.28 | $116.9K | Form 4 |
| 2026-08-17 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion | 6,000 | — | — | Form 4 |
| 2026-08-17 | Thauberger Matthew | Officer (Chief Revenue Officer) | Option exercise / conversion (derivative) | 2,250 | — | $0 | Form 4 |
| 2026-08-17 | Thauberger Matthew | Officer (Chief Revenue Officer) | Shares withheld for taxes / exercise cost | 1,145 | $38.28 | $43.8K | Form 4 |
| 2026-08-17 | Thauberger Matthew | Officer (Chief Revenue Officer) | Option exercise / conversion | 2,250 | — | — | Form 4 |
| 2026-08-17 | WEIGAND DAVID E | Officer (SVP, Chief Financial Officer) | Option exercise / conversion (derivative) | 6,500 | — | $0 | Form 4 |
| 2026-08-17 | WEIGAND DAVID E | Officer (SVP, Chief Financial Officer) | Shares withheld for taxes / exercise cost | 3,308 | $38.28 | $126.6K | Form 4 |
| 2026-08-17 | WEIGAND DAVID E | Officer (SVP, Chief Financial Officer) | Option exercise / conversion | 6,500 | — | — | Form 4 |
| 2026-08-17 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Option exercise / conversion (derivative) | 4,000 | — | $0 | Form 4 |
| 2026-08-17 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Shares withheld for taxes / exercise cost | 1,436 | $38.28 | $55.0K | Form 4 |
| 2026-08-17 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Option exercise / conversion | 4,000 | — | — | Form 4 |
| 2026-08-14 | Angel Scott | Director | Grant / award / vesting (derivative) | 7,882 | — | $0 | Form 4 |
| 2026-08-14 | Lin Judy L. | Director | Grant / award / vesting (derivative) | 7,882 | — | $0 | Form 4 |
| 2026-08-14 | Mogensen Susan | Director | Grant / award / vesting (derivative) | 7,882 | — | $0 | Form 4 |
| 2026-08-14 | BLAIR ROBERT L | Director | Grant / award / vesting (derivative) | 7,882 | — | $0 | Form 4 |
| 2026-08-14 | TUAN SHERMAN | Director | Grant / award / vesting (derivative) | 10,125 | — | $0 | Form 4 |
| 2026-08-14 | LIU TALLY C | Director | Grant / award / vesting (derivative) | 5,062 | — | $0 | Form 4 |
| 2026-08-14 | LIU TALLY C | Director | Grant / award / vesting (derivative) | 3,941 | — | $0 | Form 4 |
| 2026-08-14 | Thauberger Matthew | Officer (Chief Revenue Officer) | Grant / award / vesting (derivative) | 21,938 | — | $0 | Form 4 |
| 2026-08-14 | Thauberger Matthew | Officer (Chief Revenue Officer) | Grant / award / vesting (derivative) | 9,872 | — | $0 | Form 4 |
| 2026-08-10 | WEIGAND DAVID E | Officer (SVP, Chief Financial Officer) | Option exercise / conversion (derivative) | 1,480 | — | $0 | Form 4 |
| 2026-08-10 | WEIGAND DAVID E | Officer (SVP, Chief Financial Officer) | Shares withheld for taxes / exercise cost | 754 | $31.46 | $23.7K | Form 4 |
| 2026-08-10 | WEIGAND DAVID E | Officer (SVP, Chief Financial Officer) | Option exercise / conversion | 1,480 | — | — | Form 4 |
| 2026-08-10 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion (derivative) | 1,024 | — | $0 | Form 4 |
| 2026-08-10 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion (derivative) | 2,110 | — | $0 | Form 4 |
| 2026-08-10 | Liang Charles | Director, Officer (President and CEO), 10% owner | Shares withheld for taxes / exercise cost | 553 | $31.46 | $17.4K | Form 4 |
| 2026-08-10 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion | 1,024 | — | — | Form 4 |
| 2026-08-10 | Liang Charles | Director, Officer (President and CEO), 10% owner | Shares withheld for taxes / exercise cost | 1,139 | $31.46 | $35.8K | Form 4 |
| 2026-08-10 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion | 2,110 | — | — | Form 4 |
| 2026-08-10 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Option exercise / conversion (derivative) | 1,024 | — | $0 | Form 4 |
| 2026-08-10 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Option exercise / conversion (derivative) | 2,110 | — | $0 | Form 4 |
| 2026-08-10 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Shares withheld for taxes / exercise cost | 553 | $31.46 | $17.4K | Form 4 |
| 2026-08-10 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Option exercise / conversion | 1,024 | — | — | Form 4 |
| 2026-08-10 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Shares withheld for taxes / exercise cost | 1,139 | $31.46 | $35.8K | Form 4 |
| 2026-08-10 | Liu Liang Chiu-Chu Sara | Director, 10% owner | Option exercise / conversion | 2,110 | — | — | Form 4 |
| 2026-08-10 | Cheung Kenneth | Officer (SVP, Chief Accounting Officer) | Option exercise / conversion (derivative) | 3,429 | — | $0 | Form 4 |
| 2026-08-10 | Cheung Kenneth | Officer (SVP, Chief Accounting Officer) | Option exercise / conversion (derivative) | 1,250 | — | $0 | Form 4 |
| 2026-08-10 | Cheung Kenneth | Officer (SVP, Chief Accounting Officer) | Shares withheld for taxes / exercise cost | 1,231 | $31.46 | $38.7K | Form 4 |
| 2026-08-10 | Cheung Kenneth | Officer (SVP, Chief Accounting Officer) | Option exercise / conversion | 3,429 | — | — | Form 4 |
| 2026-08-10 | Cheung Kenneth | Officer (SVP, Chief Accounting Officer) | Shares withheld for taxes / exercise cost | 449 | $31.46 | $14.1K | Form 4 |
| 2026-08-10 | Cheung Kenneth | Officer (SVP, Chief Accounting Officer) | Option exercise / conversion | 1,250 | — | — | Form 4 |
| 2026-08-10 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Option exercise / conversion (derivative) | 1,024 | — | $0 | Form 4 |
| 2026-08-10 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Option exercise / conversion (derivative) | 1,970 | — | $0 | Form 4 |
| 2026-08-10 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Shares withheld for taxes / exercise cost | 368 | $31.46 | $11.6K | Form 4 |
| 2026-08-10 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Option exercise / conversion | 1,024 | — | — | Form 4 |
| 2026-08-10 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Shares withheld for taxes / exercise cost | 707 | $31.46 | $22.2K | Form 4 |
| 2026-08-10 | Xiao Jin | Officer (Sr. Corporate VP, Engineering) | Option exercise / conversion | 1,970 | — | — | Form 4 |
| 2026-08-10 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion (derivative) | 1,138 | — | $0 | Form 4 |
| 2026-08-10 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion (derivative) | 2,110 | — | $0 | Form 4 |
| 2026-08-10 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Shares withheld for taxes / exercise cost | 580 | $31.46 | $18.2K | Form 4 |
| 2026-08-10 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion | 1,138 | — | — | Form 4 |
| 2026-08-10 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Shares withheld for taxes / exercise cost | 1,074 | $31.46 | $33.8K | Form 4 |
| 2026-08-10 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion | 2,110 | — | — | Form 4 |
| 2026-08-10 | Thauberger Matthew | Other | Option exercise / conversion (derivative) | 430 | — | $0 | Form 4 |
| 2026-08-10 | Thauberger Matthew | Other | Option exercise / conversion (derivative) | 740 | — | $0 | Form 4 |
| 2026-08-10 | Thauberger Matthew | Other | Shares withheld for taxes / exercise cost | 219 | $31.46 | $6.9K | Form 4 |
| 2026-08-10 | Thauberger Matthew | Other | Option exercise / conversion | 430 | — | — | Form 4 |
| 2026-08-10 | Thauberger Matthew | Other | Shares withheld for taxes / exercise cost | 377 | $31.46 | $11.9K | Form 4 |
| 2026-08-10 | Thauberger Matthew | Other | Option exercise / conversion | 740 | — | — | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion (derivative) | 507 | — | $0 | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion (derivative) | 1,413 | — | $0 | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion (derivative) | 1,220 | — | $0 | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion (derivative) | 4,600 | — | $0 | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Shares withheld for taxes / exercise cost | 258 | $27.65 | $7.1K | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion | 507 | — | — | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Shares withheld for taxes / exercise cost | 719 | $27.65 | $19.9K | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion | 1,413 | — | — | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Shares withheld for taxes / exercise cost | 621 | $27.65 | $17.2K | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion | 1,220 | — | — | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Shares withheld for taxes / exercise cost | 2,341 | $27.65 | $64.7K | Form 4 |
| 2026-07-01 | Malyala Vikranth | Officer (SVP, Chief Business Officer) | Option exercise / conversion | 4,600 | — | — | Form 4 |
| 2026-07-01 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion (derivative) | 273 | — | $0 | Form 4 |
| 2026-07-01 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion (derivative) | 510 | — | $0 | Form 4 |
| 2026-07-01 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion (derivative) | 830 | — | $0 | Form 4 |
| 2026-07-01 | Liang Charles | Director, Officer (President and CEO), 10% owner | Shares withheld for taxes / exercise cost | 148 | $27.65 | $4.1K | Form 4 |
| 2026-07-01 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion | 273 | — | — | Form 4 |
| 2026-07-01 | Liang Charles | Director, Officer (President and CEO), 10% owner | Shares withheld for taxes / exercise cost | 276 | $27.65 | $7.6K | Form 4 |
| 2026-07-01 | Liang Charles | Director, Officer (President and CEO), 10% owner | Option exercise / conversion | 510 | — | — | Form 4 |
| 2026-07-01 | Liang Charles | Director, Officer (President and CEO), 10% owner | Shares withheld for taxes / exercise cost | 448 | $27.65 | $12.4K | Form 4 |
Ask the chat about SMCI's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: Supermicro (SMCI).
Last updated 2026-10-07 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.