Kulicke & Soffa Industries, Inc. Insider Trading

KLIC

Last 12 months

Insiders sold $18.4M and bought nothing on the open market.

22% of the selling was scheduled in advance under 10b5-1 plans. Interim CEO and CFO Lester A Wong sold $7.3M on Jun 18, 54% of their stake, outside a plan. The last open-market buy by an executive or director was in May 2024.

Net open-market

−$18.4M

0 buys · 14 sales

Under a 10b5-1 plan

22%

of the value sold

Insiders who bought / sold

0 / 7

executives and directors

Last open-market buy

May 2024

May 6, 2024

Get an email when KLIC's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Jun 18	Lester A Wong Interim CEO and CFO	SoldNo plan	60,000	$121.71	$7.3M	54%	Form 4
Jun 12	Nelson Munpun Wong Senior Vice President	SoldNo plan	15,000	$113.72	$1.71M	17%	Form 4
Jun 11	Peter T M Kong Director	SoldNo plan	1,551	$110.00	171K	1.5%	Form 4
May 20	Mui Sung Yeo Director	SoldNo plan	20,000	$100.00	$2M	25%	Form 4
May 11	Zi Yao Lim General Counsel	SoldNo plan	1,500	$102.98	154K	6.6%	Form 4
Feb 25	David Jeffrey Richardson Director	SoldNo plan	9,364	$72.20	676K	34%	Form 4
Feb 13	Mui Sung Yeo Director	SoldNo plan	19,143	$71.98	$1.38M	20%	Form 4
Feb 10	Robert Nestor Chylak Senior Vice President	SoldNo plan	7,098	$73.28	520K	24%	Form 4
Feb 9	Zi Yao Lim General Counsel	SoldNo plan	1,000	$71.54	72K	4.2%	Form 4
Feb 5	Nelson Munpun Wong Senior Vice President	Sold10b5-1 plan	39,800	$60.98	$2.43M	32%	Form 4
Jan 22	Nelson Munpun Wong Senior Vice President	Sold10b5-1 plan	200	$60.00	12K	0.2%	Form 4
Jan 12	Nelson Munpun Wong Senior Vice President	Sold10b5-1 plan	30,000	$56.53	$1.7M	19%	Form 4
Dec 8, 2025	Nelson Munpun Wong Senior Vice President	SoldNo plan	5,004	$50.07	251K	3.1%	Form 4
Dec 2, 2025	Zi Yao Lim General Counsel	SoldNo plan	1,000	$45.00	45K	4.0%	Form 4
Aug 12, 2025	Nelson Munpun Wong Senior Vice President	SoldNo plan	30,000	$37.07	$1.11M	17%	Form 4
Dec 9, 2024	Robert Nestor Chylak Senior Vice President	SoldNo plan	11,391	$49.52	564K	35%	Form 4
Dec 6, 2024	Chin Hu Lim Director	SoldNo plan	30,000	$48.11	$1.44M	33%	Form 4
Dec 5, 2024	Fusen Ernie Chen President and CEO	SoldNo plan	80,000	$48.29	$3.86M	6.8%	Form 4
Nov 21, 2024	Nelson Munpun Wong Senior Vice President	SoldNo plan	30,000	$47.56	$1.43M	14%	Form 4
Nov 20, 2024	Lester A Wong Chief Financial Officer	SoldNo plan	60,000	$46.37	$2.78M	43%	Form 4
Nov 19, 2024 – Nov 20, 2024	Chan Pin Chong Executive Vice President	SoldNo plan 2 parts	45,000	$46.23 average	$2.08M	49%	Form 4

Jun 18No plan
Lester A Wong
Interim CEO and CFO · sold 60,000 at $121.71
$7.3M
54% of stake
Jun 12No plan
Nelson Munpun Wong
Senior Vice President · sold 15,000 at $113.72
$1.71M
17% of stake
Jun 11No plan
Peter T M Kong
Director · sold 1,551 at $110.00
171K
1.5% of stake
May 20No plan
Mui Sung Yeo
Director · sold 20,000 at $100.00
$2M
25% of stake
May 11No plan
Zi Yao Lim
General Counsel · sold 1,500 at $102.98
154K
6.6% of stake
Feb 25No plan
David Jeffrey Richardson
Director · sold 9,364 at $72.20
676K
34% of stake
Feb 13No plan
Mui Sung Yeo
Director · sold 19,143 at $71.98
$1.38M
20% of stake
Feb 10No plan
Robert Nestor Chylak
Senior Vice President · sold 7,098 at $73.28
520K
24% of stake
Feb 9No plan
Zi Yao Lim
General Counsel · sold 1,000 at $71.54
72K
4.2% of stake
Feb 510b5-1 plan
Nelson Munpun Wong
Senior Vice President · sold 39,800 at $60.98
$2.43M
32% of stake
Jan 2210b5-1 plan
Nelson Munpun Wong
Senior Vice President · sold 200 at $60.00
12K
0.2% of stake
Jan 1210b5-1 plan
Nelson Munpun Wong
Senior Vice President · sold 30,000 at $56.53
$1.7M
19% of stake
Dec 8, 2025No plan
Nelson Munpun Wong
Senior Vice President · sold 5,004 at $50.07
251K
3.1% of stake
Dec 2, 2025No plan
Zi Yao Lim
General Counsel · sold 1,000 at $45.00
45K
4.0% of stake
Aug 12, 2025No plan
Nelson Munpun Wong
Senior Vice President · sold 30,000 at $37.07
$1.11M
17% of stake
Dec 9, 2024No plan
Robert Nestor Chylak
Senior Vice President · sold 11,391 at $49.52
564K
35% of stake
Dec 6, 2024No plan
Chin Hu Lim
Director · sold 30,000 at $48.11
$1.44M
33% of stake
Dec 5, 2024No plan
Fusen Ernie Chen
President and CEO · sold 80,000 at $48.29
$3.86M
6.8% of stake
Nov 21, 2024No plan
Nelson Munpun Wong
Senior Vice President · sold 30,000 at $47.56
$1.43M
14% of stake
Nov 20, 2024No plan
Lester A Wong
Chief Financial Officer · sold 60,000 at $46.37
$2.78M
43% of stake
Nov 19, 2024 – Nov 20, 2024No plan
Chan Pin Chong
Executive Vice President · sold 45,000 at avg $46.23
$2.08M
49% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch KLIC, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

Peers

Semiconductors & Related Devices · Pick stocks to compare with KLIC

CompareIntrinsic value

ALGMAllegro MicroSystems, Inc.

$31.25-7.16%24

TET1 Energy Inc.

$2.73-3.53%0

FORMFormFactor Inc.

$85.24-11.93%73

ICHRIchor Holdings Ltd.

$33.71-7.72%14

PLABPhotronics Inc.

$27.38-2.21%50

SLABSilicon Laboratories Inc.

$222.00-0.15%20

IPGPIPG Photonics Corporation

$70.11-5.79%30

SMTCSemtech Corporation

$110.96-12.92%32

Held by ETFs

KLIC is in 104 US ETFs. The largest of them, with KLIC's weight in each:

Spot a number that looks wrong? Check it in KLIC's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

2 of 2 free stocks used today

Keep analysing KLIC

Create a free account and get 14 days of Premium: every stock and every tool.

Unlimited stocksQuality, fair value and dividends for 10,000+ stocks
Stock screenerFilter on quality, valuation and dividend safety
Portfolio trackerReal return, dividend calendar and portfolio quality
Editable DCFChange the assumptions and watch fair value move
Compare side by sideUp to 10 stocks in one table
Unlimited alertsPrice, P/E, Quality Score and yield

No card. Moves to Free after, unless you upgrade.

Already have an account?

Or come back tomorrow. Stocks on your watchlist are always free to view.