Beta22% was sold under disclosed trading plans, 78% with no plan disclosed. The largest seller, Lester Wong (CFO), sold $7.3M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why
A share of stake is shown for 0 of the 7 officers and directors who sold. 13 are left out Disclosed company stock is not an insider's whole wealth.i
Left out: Fusen Chen, Nelson Wong, Lester Wong, Peter Kong, Mui Yeo, Gregory Milzcik, Chan Chong, Robert Chylak, David Richardson, Zi Lim, Jon Olson, Denise Dignam and Rajendra Talluri (share of stake is being verified).
Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.
Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Robert Chylak Senior Vice President | 1,157 | $88.54 | n/a | n/a | Oct 13, 2026 | Oct 15, 2026 |
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Robert Chylak Senior Vice President | 3,948 | $47.44 | n/a | n/a | Oct 11, 2026 | Oct 13, 2026 |
"% of total stake" is the shares in an event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings are not confirmed, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.
No. Rajendra Talluri reported no open-market sales in the past 12 months.
Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 22% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 78% had no disclosed plan. A trading plan schedules sales in advance.
No. Officers and directors reported no purchases in the past 12 months.
| Who sold | Amount | % of holdings | Trading plan |
|---|---|---|---|
| Lester Wong CFO | $7.3M 60K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Nelson Wong Senior Vice President | $6.1M 90K shares | Not confirmedshare of stake is being verified. Why | 68% under a disclosed plan 32% no plan disclosed |
| Mui Yeo Director | $3.4M 39K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| David Richardson Director | $676K 9.4K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Robert Chylak Senior Vice President | $520K 7.1K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Zi Lim General Counsel | $271K 3.5K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
| Peter Kong Director | $171K 1.6K shares | Not confirmedshare of stake is being verified. Why | No plan disclosed |
Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.
| Insider | Held Oct 16, 2025 | Sold | Held Oct 16, 2026 | Still held |
|---|---|---|---|---|
Fusen Chen!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Fusen Chen are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Fusen ChenHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Fusen Chen are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Nelson Wong!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Nelson Wong are complete. Senior Vice President | n/a | −90K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Nelson WongHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Nelson Wong are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Lester Wong!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Lester Wong are complete. CFO | n/a | −60K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Lester WongHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Lester Wong are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Peter Kong!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Peter Kong are complete. Director | n/a | −1.6K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Peter KongHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Peter Kong are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Mui Yeo!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Mui Yeo are complete. Director | n/a | −39K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Mui YeoHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Mui Yeo are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Gregory Milzcik!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Gregory Milzcik are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Gregory MilzcikHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Gregory Milzcik are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Chan Chong!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Chan Chong are complete. Executive Vice President | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Chan ChongHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Chan Chong are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Robert Chylak!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Robert Chylak are complete. Senior Vice President | n/a | −7.1K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Robert ChylakHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Robert Chylak are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −5.1Kwithheld by the company for taxes | ||||
David Richardson!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for David Richardson are complete. Director | n/a | −9.4K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for David RichardsonHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for David Richardson are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Zi Lim!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Zi Lim are complete. General Counsel | n/a | −3.5K | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Zi LimHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Zi Lim are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Jon Olson!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Jon Olson are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Jon OlsonHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jon Olson are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Denise Dignam!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Denise Dignam are complete. Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Denise DignamHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Denise Dignam are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Rajendra Talluri!Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Rajendra Talluri are complete. CEO, Director | n/a | 0 | n/a | n/a |
Vesting, gifts, unvested awards and holding lines for Rajendra TalluriHoldings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Rajendra Talluri are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) | ||||
Holdings and share of stake for Kulicke & Soffa Industries Inc are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.
Officer and director open-market sales: $18.4M across 210,660 shares. Plan status and stated purpose are separate questions, and a sale can have both.
The lighter segment is sales with no plan disclosed in the filing ($14.3M), including tax-related sales outside a plan.
Sales with no 10b5-1 plan and no tax reference in the filing. $7.3M of it is Lester Wong. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Lester Wong, Jun 18, 2026
5,146 shares ($291K) were withheld by the company for taxes, which isn't a market sale.
| Seller | Shares sold | Proceeds | Under a disclosed plan | Share of total | Sales dates |
|---|---|---|---|---|---|
| Lester Wong CFO | 60K | $7.3M | 0% | 40% | Jun 18, 2026 to Jun 18, 2026 |
| Nelson Wong Senior Vice President | 90K | $6.1M | 68% | 33% | Dec 8, 2025 to Jun 12, 2026 |
| Mui Yeo Director | 39K | $3.4M | 0% | 18% | Feb 13, 2026 to May 20, 2026 |
| David Richardson Director | 9.4K | $676K | 0% | 4% | Feb 25, 2026 to Feb 25, 2026 |
| Robert Chylak Senior Vice President | 7.1K | $520K | 0% | 3% | Feb 10, 2026 to Feb 10, 2026 |
| Zi Lim General Counsel | 3.5K | $271K | 0% | 1% | Dec 2, 2025 to May 11, 2026 |
| Peter Kong Director | 1.6K | $171K | 0% | 0.9% | Jun 11, 2026 to Jun 11, 2026 |
| Month | Sale proceeds | Disclosed plan | To cover taxes | No plan disclosed |
|---|---|---|---|---|
| Oct 2025 | $0 | $0 | $0 | $0 |
| Nov 2025 | $0 | $0 | $0 | $0 |
| Dec 2025 | $296K | $0 | $0 | $296K |
| Jan 2026 | $1.7M | $1.7M | $0 | $0 |
| Feb 2026 | $5.1M | $2.4M | $0 | $2.6M |
| Mar 2026 | $0 | $0 | $0 | $0 |
| Apr 2026 | $0 | $0 | $0 | $0 |
| May 2026 | $2.2M | $0 | $0 | $2.2M |
| Jun 2026 | $9.2M | $0 | $0 | $9.2M |
| Jul 2026 | $0 | $0 | $0 | $0 |
| Aug 2026 | $0 | $0 | $0 | $0 |
| Sep 2026 | $0 | $0 | $0 | $0 |
| Oct 2026 | $0 | $0 | $0 | $0 |
In line with the past 5 years. 7 insiders sold; the average is 6 a year.
| 12 months ending | Shares sold | Insiders who sold | Proceeds |
|---|---|---|---|
| Oct 16, 2026 Latest 12 months | 211K | 7 | $18.4M |
| Oct 16, 2025 1 year earlier | 286K | 6 | $13.3M |
| Oct 16, 2024 2 years earlier | 84K | 4 | $4.5M |
| Oct 17, 2023 3 years earlier | 238K | 6 | $11.7M |
| Oct 17, 2022 4 years earlier | 127K | 5 | $8.3M |
| Oct 17, 2021 5 years earlier | 124K | 7 | $6.6M |
Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.
Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Kulicke & Soffa Industries Inc are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.
External context: we only cite outside events when a documented connection exists. None is shown for this period.
All 1,273 Forms 3, 4 and 5 on record for Kulicke & Soffa Industries Inc (SEC CIK 56978), filed from Dec 4, 2000 to Oct 16, 2026; 59 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 16, 2026. Prices are the ones reported in each filing, often weighted averages. 9 older filings exist only on paper and could not be read.
Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.
Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".
Spotted something wrong on this page? Report an error. We check every report against the SEC filing and list what we fix in the corrections log.