SVCO insider buying and SEC filings, explained
Silvaco Group, Inc. · CIK 1943289
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$431K
Insiders who bought
4
Sold (not marked 10b5-1)
$5.9M
Planned sales (10b5-1)
$9K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Aug 25, 2026 | Sale | Candace Jackson (Officer) sold 3,500 shares at $7.00 ($25K). Holdings down 7% to 46,279 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 26, 2026 |
| Aug 12, 2026 | Sale | Christopher John Zegarelli (CFO) sold 2,257 shares at about $7.55 ($17K). Holdings down <1% to 540,324 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 13, 2026 |
| Aug 12, 2026 | Sale | Candace Jackson (Officer) sold 1,570 shares at about $7.55 ($12K). Holdings down 3% to 49,779 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 13, 2026 |
| Aug 11, 2026 | Purchase (code P) | Anthony K.K. Ngai (Director) bought 750 shares at $7.37 ($6K), reported as a purchase (code P). Holdings up 1% to 118,972 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 12, 2026 |
| Aug 11, 2026 | Planned (10b5-1) | Ted L Tewksbury III (Director) sold 580 shares at about $7.28 ($4K), marked as a 10b5-1 plan trade. Holdings down 3% to 18,143 shares. | SEC filing Filed Aug 12, 2026 |
| Aug 11, 2026 | Planned (10b5-1) | Cheemin Bo-Linn (Director) sold 700 shares at about $7.28 ($5K), marked as a 10b5-1 plan trade. Holdings down 4% to 18,264 shares. | SEC filing Filed Aug 12, 2026 |
| Jun 16, 2026 | Purchase (code P) | Anthony K.K. Ngai (Director) bought 500 shares at $12.50 ($6K), reported as a purchase (code P). Holdings up <1% to 115,476 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 18, 2026 |
| Jun 11, 2026 | Sale | Katherine S. Ngai-Pesic (Director and 10% owner) sold 200,000 shares at about $11.27 ($2.3M). Holdings down 2% to 9,176,403 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 11, 2026 |
| Jun 5, 2026 | Purchase (code P) | Anthony K.K. Ngai (Director) bought 1,000 shares at $13.07 ($13K), reported as a purchase (code P). Holdings up 1% to 114,976 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 8, 2026 |
| Jun 3, 2026 | Sale | Illiya I. Pesic (Director and 10% owner) sold 6,000 shares at $12.96 ($78K). Holdings down <1% to 5,394,672 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 5, 2026 |
| May 14, 2026 | Sale | Candace Jackson (Officer) sold 2,000 shares at $11.00 ($22K). Holdings down 4% to 51,349 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 14, 2026 |
| Apr 1, 2026 | Sale | Christopher John Zegarelli (CFO) sold 2,431 shares at about $7.11 ($17K). Holdings down <1% to 536,976 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 3, 2026 |
| Apr 1, 2026 | Sale | Candace Jackson (Officer) sold 1,817 shares at about $7.12 ($13K). Holdings down 3% to 53,349 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 3, 2026 |
| Mar 17, 2026 | Sale | Candace Jackson (Officer) sold 1,500 shares at about $5.00 ($8K). Holdings down 3% to 55,166 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 19, 2026 |
| Dec 4, 2025 | Sale | Yelena I. Pesic (Member of 10% owner group) sold 300,000 shares at $1.99 ($597K). Holdings down 8% to 3,603,073 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 19, 2026 |
| Nov 17, 2025–Jan 7, 2026 | Sale | Illiya I. Pesic (Member of 10% owner group) sold 400,000 shares between Nov 17, 2025 and Jan 7 at about $1.93 ($773K). Holdings down 7% to 5,379,899 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 19, 2026 |
| Jun 26–Nov 25, 2025 | Sale | Katherine S. Ngai-Pesic (Director and 10% owner) sold 950,000 shares between Jun 26, 2025 and Nov 25, 2025 at about $2.12 ($2.0M). Holdings down 9% to 9,353,886 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 19, 2026 |
| Dec 11, 2025 | Purchase (code P) | Anthony K.K. Ngai (Director) bought 1,000 shares at $4.23 ($4K), reported as a purchase (code P). Holdings up 1% to 91,777 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 15, 2025 |
| Dec 10, 2025 | Purchase (code P) | Katherine S. Ngai-Pesic (Director and 10% owner) bought 25,000 shares at about $4.13 ($103K), reported as a purchase (code P). Holdings up <1% to 10,303,886 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 10, 2025 |
| Dec 9, 2025 | Purchase (code P) | Walden C. Rhines (CEO and Director) bought 13,100 shares at about $4.01 ($53K), reported as a purchase (code P). Holdings up 14% to 105,918 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 9, 2025 |
| Dec 8, 2025 | Purchase (code P) | Christopher John Zegarelli (CFO) bought 10,000 shares at about $3.80 ($38K), reported as a purchase (code P). Holdings up 2% to 439,407 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 8, 2025 |
| Nov 18, 2025 | Purchase (code P) | Anthony K.K. Ngai (Director) bought 10,000 shares at $4.26 ($43K), reported as a purchase (code P). Holdings up 12% to 90,777 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 20, 2025 |
| Nov 19, 2025 | Sale | Candace Jackson (Officer) sold 8,300 shares at $4.25 ($35K). Holdings down 16% to 43,069 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 19, 2025 |
| Nov 18, 2025 | Purchase (code P) | Walden C. Rhines (CEO and Director) bought 29,000 shares at about $4.07 ($118K), reported as a purchase (code P). Holdings up 45% to 92,818 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 19, 2025 |
| Nov 17, 2025 | Purchase (code P) | Christopher John Zegarelli (CFO) bought 5,000 shares at $3.91 ($20K), reported as a purchase (code P). Holdings up 1% to 429,407 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 18, 2025 |
| Nov 17, 2025 | Purchase (code P) | Walden C. Rhines (CEO and Director) bought 11,272 shares at about $3.90 ($44K), reported as a purchase (code P). Holdings up 21% to 63,818 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 18, 2025 |
33 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
4 insiders bought in 30 days
$418K in purchases since Nov 17, 2025 · Purchases traded Nov 17, 2025 to Dec 10, 2025 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| Walden C. Rhines (CEO) | $44K | Nov 17, 2025 | SEC filing |
| Christopher John Zegarelli (CFO) | $20K | Nov 17, 2025 | SEC filing |
| Walden C. Rhines (CEO) | $118K | Nov 18, 2025 | SEC filing |
| Anthony K.K. Ngai (Director) | $43K | Nov 18, 2025 | SEC filing |
| Christopher John Zegarelli (CFO) | $38K | Dec 8, 2025 | SEC filing |
| Walden C. Rhines (CEO) | $53K | Dec 9, 2025 | SEC filing |
| Katherine S. Ngai-Pesic (Director) | $103K | Dec 10, 2025 | SEC filing |
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
Follow SVCO in the Insider Ledger app
Get the appA plain-English brief of insider purchases, 8-Ks and red flags at the companies you pick. No account needed.