FormFactor Inc. Insider Trading

FORM

Last 12 months

Insiders sold $23.4M and bought nothing on the open market.

70% of the selling was scheduled in advance under 10b5-1 plans. Director Sheri Rhodes sold 794K on Jun 2, 54% of their stake, outside a plan. The last open-market buy by an executive or director was in Nov 2016.

Net open-market

−$23.4M

0 buys · 32 sales

Under a 10b5-1 plan

70%

of the value sold

Insiders who bought / sold

0 / 9

executives and directors

Last open-market buy

Nov 2016

Nov 1, 2016

Get an email when FORM'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
Oct 14	Mike Slessor CEO	Sold10b5-1 plan 3 parts	11,098	$125.20 average	$1.39M	2.4%	Form 4
Sep 16	Mike Slessor CEO	Sold10b5-1 plan 3 parts	17,510	$104.73 average	$1.83M	3.6%	Form 4
Sep 3	Kelley Steven-Waiss Director	SoldNo plan	2,100	$96.10	202K	7.9%	Form 4
Aug 14	Mike Slessor CEO	Sold10b5-1 plan 6 parts	16,002	$130.95 average	$2.1M	3.2%	Form 4
Jul 15	Mike Slessor CEO	Sold10b5-1 plan 6 parts	4,735	$118.31 average	560K	1.1%	Form 4
Jun 15	Thomas St Dennis Director	SoldNo plan	2,800	$151.49	424K	9.0%	Form 4
Jun 10	Mike Slessor CEO	Sold10b5-1 plan 7 parts	11,890	$121.35 average	$1.44M	2.7%	Form 4
Jun 2	Sheri Rhodes Director	SoldNo plan	6,328	$125.40	794K	54%	Form 4
May 21	Rebeca Obregon-Jimenez Director	SoldNo plan	3,828	$126.48	484K	33%	Form 4
May 20	Brian C White Director	SoldNo plan	3,250	$126.00	410K	27%	Form 4
May 19	Thomas St Dennis Director	SoldNo plan	1,000	$115.84	116K	3.0%	Form 4
May 15	Kelley Steven-Waiss Director	SoldNo plan	5,400	$125.60	678K	18%	Form 4
May 13	Jorge Titinger Director	SoldNo plan	4,009	$128.79	516K	23%	Form 4
May 13	Mike Slessor CEO	Sold10b5-1 plan 12 parts	9,438	$126.52 average	$1.19M	2.1%	Form 4
Apr 15	Mike Slessor CEO	Sold10b5-1 plan 5 parts	11,294	$127.72 average	$1.44M	2.5%	Form 4
Mar 18	Mike Slessor CEO	Sold10b5-1 plan 3 parts	10,227	$95.15 average	973K	2.2%	Form 4
Mar 5	Aric Brendan McKinnis CFO, SVP Global Finance	Sold10b5-1 plan	3,462	$90.42	313K	24%	Form 4
Feb 24	Brian C White Director	SoldNo plan	2,300	$100.01	230K	18%	Form 4
Feb 18	Mike Slessor CEO	Sold10b5-1 plan 3 parts	8,664	$94.14 average	816K	1.8%	Form 4
Feb 11	Kevin J Brewer Director	SoldNo plan	3,000	$96.20	289K	27%	Form 4
Feb 10	Thomas St Dennis Director	SoldNo plan 2 parts	7,431	$93.84 average	697K	19%	Form 4
Feb 10	Sheri Rhodes Director	SoldNo plan	7,634	$92.61	707K	42%	Form 4
Feb 10	Kelley Steven-Waiss Director	SoldNo plan	2,200	$93.70	206K	6.7%	Form 4
Feb 9	Rebeca Obregon-Jimenez Director	SoldNo plan	2,770	$95.82	265K	21%	Form 4
Feb 9	Brian C White Director	SoldNo plan	5,500	$90.95	500K	30%	Form 4
Feb 9	Jorge Titinger Director	SoldNo plan	2,000	$88.84	178K	10%	Form 4
Jan 15	Mike Slessor CEO	Sold10b5-1 plan 2 parts	13,088	$76.81 average	$1.01M	2.7%	Form 4
Jan 6	Mike Slessor CEO	Sold10b5-1 plan	39,606	$65.00	$2.57M	7.5%	Form 4
Dec 17, 2025	Mike Slessor CEO	Sold10b5-1 plan 2 parts	7,669	$56.36 average	432K	1.4%	Form 4
Dec 2, 2025	Kelley Steven-Waiss Director	SoldNo plan	2,700	$55.97	151K	7.6%	Form 4
Nov 19, 2025	Mike Slessor CEO	Sold10b5-1 plan 2 parts	8,403	$50.06 average	421K	1.6%	Form 4
Nov 17, 2025	Thomas St Dennis Director	SoldNo plan	2,000	$49.85	100K	4.9%	Form 4
Sep 12, 2025	Kelley Steven-Waiss Director	SoldNo plan	3,600	$30.43	110K	9.2%	Form 4
Aug 13, 2025	Rebeca Obregon-Jimenez Director	SoldNo plan	4,000	$29.55	118K	23%	Form 4
Jul 1, 2025	Mike Slessor CEO	Sold10b5-1 plan	4,000	$34.03	136K	0.8%	Form 4
Jun 2, 2025	Mike Slessor CEO	Sold10b5-1 plan	4,000	$29.83	119K	0.8%	Form 4
May 29, 2025	Thomas St Dennis Director	SoldNo plan	3,000	$31.24	94K	6.8%	Form 4
May 1, 2025	Mike Slessor CEO	Sold10b5-1 plan	4,000	$31.72	127K	0.8%	Form 4
Apr 1, 2025	Mike Slessor CEO	Sold10b5-1 plan	4,000	$28.24	113K	0.8%	Form 4
Mar 5, 2025	Kelley Steven-Waiss Director	SoldNo plan	3,870	$31.02	120K	11%	Form 4

Oct 1410b5-1 plan
Mike Slessor
CEO · sold 11,098 at avg $125.20
$1.39M
2.4% of stake
Sep 1610b5-1 plan
Mike Slessor
CEO · sold 17,510 at avg $104.73
$1.83M
3.6% of stake
Sep 3No plan
Kelley Steven-Waiss
Director · sold 2,100 at $96.10
202K
7.9% of stake
Aug 1410b5-1 plan
Mike Slessor
CEO · sold 16,002 at avg $130.95
$2.1M
3.2% of stake
Jul 1510b5-1 plan
Mike Slessor
CEO · sold 4,735 at avg $118.31
560K
1.1% of stake
Jun 15No plan
Thomas St Dennis
Director · sold 2,800 at $151.49
424K
9.0% of stake
Jun 1010b5-1 plan
Mike Slessor
CEO · sold 11,890 at avg $121.35
$1.44M
2.7% of stake
Jun 2No plan
Sheri Rhodes
Director · sold 6,328 at $125.40
794K
54% of stake
May 21No plan
Rebeca Obregon-Jimenez
Director · sold 3,828 at $126.48
484K
33% of stake
May 20No plan
Brian C White
Director · sold 3,250 at $126.00
410K
27% of stake
May 19No plan
Thomas St Dennis
Director · sold 1,000 at $115.84
116K
3.0% of stake
May 15No plan
Kelley Steven-Waiss
Director · sold 5,400 at $125.60
678K
18% of stake
May 13No plan
Jorge Titinger
Director · sold 4,009 at $128.79
516K
23% of stake
May 1310b5-1 plan
Mike Slessor
CEO · sold 9,438 at avg $126.52
$1.19M
2.1% of stake
Apr 1510b5-1 plan
Mike Slessor
CEO · sold 11,294 at avg $127.72
$1.44M
2.5% of stake
Mar 1810b5-1 plan
Mike Slessor
CEO · sold 10,227 at avg $95.15
973K
2.2% of stake
Mar 510b5-1 plan
Aric Brendan McKinnis
CFO, SVP Global Finance · sold 3,462 at $90.42
313K
24% of stake
Feb 24No plan
Brian C White
Director · sold 2,300 at $100.01
230K
18% of stake
Feb 1810b5-1 plan
Mike Slessor
CEO · sold 8,664 at avg $94.14
816K
1.8% of stake
Feb 11No plan
Kevin J Brewer
Director · sold 3,000 at $96.20
289K
27% of stake
Feb 10No plan
Thomas St Dennis
Director · sold 7,431 at avg $93.84
697K
19% of stake
Feb 10No plan
Sheri Rhodes
Director · sold 7,634 at $92.61
707K
42% of stake
Feb 10No plan
Kelley Steven-Waiss
Director · sold 2,200 at $93.70
206K
6.7% of stake
Feb 9No plan
Rebeca Obregon-Jimenez
Director · sold 2,770 at $95.82
265K
21% of stake
Feb 9No plan
Brian C White
Director · sold 5,500 at $90.95
500K
30% of stake
Feb 9No plan
Jorge Titinger
Director · sold 2,000 at $88.84
178K
10% of stake
Jan 1510b5-1 plan
Mike Slessor
CEO · sold 13,088 at avg $76.81
$1.01M
2.7% of stake
Jan 610b5-1 plan
Mike Slessor
CEO · sold 39,606 at $65.00
$2.57M
7.5% of stake
Dec 17, 202510b5-1 plan
Mike Slessor
CEO · sold 7,669 at avg $56.36
432K
1.4% of stake
Dec 2, 2025No plan
Kelley Steven-Waiss
Director · sold 2,700 at $55.97
151K
7.6% of stake
Nov 19, 202510b5-1 plan
Mike Slessor
CEO · sold 8,403 at avg $50.06
421K
1.6% of stake
Nov 17, 2025No plan
Thomas St Dennis
Director · sold 2,000 at $49.85
100K
4.9% of stake
Sep 12, 2025No plan
Kelley Steven-Waiss
Director · sold 3,600 at $30.43
110K
9.2% of stake
Aug 13, 2025No plan
Rebeca Obregon-Jimenez
Director · sold 4,000 at $29.55
118K
23% of stake
Jul 1, 202510b5-1 plan
Mike Slessor
CEO · sold 4,000 at $34.03
136K
0.8% of stake
Jun 2, 202510b5-1 plan
Mike Slessor
CEO · sold 4,000 at $29.83
119K
0.8% of stake
May 29, 2025No plan
Thomas St Dennis
Director · sold 3,000 at $31.24
94K
6.8% of stake
May 1, 202510b5-1 plan
Mike Slessor
CEO · sold 4,000 at $31.72
127K
0.8% of stake
Apr 1, 202510b5-1 plan
Mike Slessor
CEO · sold 4,000 at $28.24
113K
0.8% of stake
Mar 5, 2025No plan
Kelley Steven-Waiss
Director · sold 3,870 at $31.02
120K
11% 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 FORM, 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.

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Held by ETFs

FORM is in 119 US ETFs. The largest of them, with FORM's weight in each:

Spot a number that looks wrong? Check it in FORM'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.

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