FormFactor Inc CEO Slessor Sells 4,735 Shares

FORMFACTOR INC CEO and director Mike Slessor reported open-market sales of 4,735 shares of common stock on July 15, 2026, executed in six transactions at weighted-average prices within disclosed ranges between about $115.995 and $121.38 per share.

Rhea-AI Filing Summary

FORMFACTOR INC CEO and director Mike Slessor reported open-market sales of 4,735 shares of common stock on July 15, 2026, executed in six transactions at weighted-average prices within disclosed ranges between about $115.995 and $121.38 per share.

The sales occurred automatically under a pre-arranged Rule 10b5-1 trading plan adopted on August 19, 2025.

Insider Trade Summary 10b5-1

Net Seller: 4,735 shares

Net Sell 6 txns

Insider SLESSOR MIKE

Role CEO

Sold 4,735 shs ($560K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	1,041	$116.56	$121K
Sale	Common Stock F1, F3	1,650	$117.39	$194K
Sale	Common Stock F1, F4	706	$118.21	$83K
Sale	Common Stock F1, F5	170	$119.08	$20K
Sale	Common Stock F1, F6	300	$120.58	$36K
Sale	Common Stock F1, F7	868	$121.30	$105K

Holdings After Transaction: Common Stock — 430,412 shares (Direct)

Footnotes (7)

1. F1. The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025.
2. F2. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $115.995 through $116.985. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
3. F3. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $116.995 through $117.9. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
4. F4. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $117.985 through $118.8. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
5. F5. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $119.075 through $119.085. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
6. F6. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $120.215 through $120.76. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
7. F7. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $121.14 through $121.38. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

Key Figures

Shares sold: 4,735 shares Number of sale transactions: 6 Sale price example: $121.3000 per share +4 more

7 metrics

Shares sold 4,735 shares Aggregate common shares sold in open-market transactions on July 15, 2026 by the CEO

Number of sale transactions 6 Count of separate open-market sale entries reported for July 15, 2026

Sale price example $121.3000 per share Weighted-average price for one reported sale of 868 shares of common stock

Shares in largest single sale 1,650 shares Largest individual transaction size reported, at a weighted-average price of $117.3900

Lowest price range bound $115.995 Lower end of a disclosed weighted-average sale price range for the July 15, 2026 trades

Highest price range bound $121.38 Upper end of a disclosed weighted-average sale price range for the July 15, 2026 trades

Rule 10b5-1 plan adoption date August 19, 2025 Date on which the trading plan governing the reported sales was adopted

Key Terms

Rule 10b5-1 trading plan, weighted average sale price, open-market sale

3 terms

Rule 10b5-1 trading plan regulatory

"The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average sale price financial

"Price represents the weighted average sale price for the transaction reported."

open-market sale market

"Transaction code "S" reflects a Sale in open market or private transaction."

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider stock sale did FORM (FormFactor Inc) disclose for July 15, 2026?

FormFactor Inc reported that CEO Mike Slessor sold 4,735 shares of common stock on July 15, 2026 in six open-market transactions. The trades used weighted-average pricing within disclosed ranges between about $115.995 and $121.38 per share.

At what prices did FormFactor Inc (FORM) CEO Mike Slessor sell shares?

The reported sales by CEO Mike Slessor were executed at weighted-average prices within several disclosed ranges between about $115.995 and $121.38 per share. Each transaction’s price reflects an average of multiple trades in that range.

How many transactions did FORM’s CEO execute in this Form 4 filing?

CEO Mike Slessor executed six open-market sale transactions in FormFactor Inc common stock, all dated July 15, 2026. Together these transactions covered an aggregate of 4,735 shares sold, as summarized in the filing’s transaction table.

Was the FormFactor Inc (FORM) CEO stock sale under a Rule 10b5-1 plan?

Yes. The filing states the reported sales occurred automatically under a Rule 10b5-1 trading plan adopted on August 19, 2025. Such plans pre-arrange trading activity, reducing the significance of trade timing as an informational signal.

What role does Mike Slessor hold at FormFactor Inc (FORM) in this Form 4?

Mike Slessor is identified as both CEO and a director of FormFactor Inc in the Form 4. The reported transactions therefore reflect trading activity by a senior executive and board member in the company’s common stock.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 07/16/2026 - 05:30 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SLESSOR MIKE

(Last) (First) (Middle)

7005 SOUTHFRONT ROAD

(Street)

LIVERMORE CALIFORNIA 94551

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
FORMFACTOR INC [ FORM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/15/2026		S		1,041(1)	D	$116.56(2)	434,106	D
Common Stock	07/15/2026		S		1,650(1)	D	$117.39(3)	432,456	D
Common Stock	07/15/2026		S		706(1)	D	$118.21(4)	431,750	D
Common Stock	07/15/2026		S		170(1)	D	$119.08(5)	431,580	D
Common Stock	07/15/2026		S		300(1)	D	$120.58(6)	431,280	D
Common Stock	07/15/2026		S		868(1)	D	$121.3(7)	430,412	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The reported sale of shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on August 19, 2025.

2. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $115.995 through $116.985. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

3. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $116.995 through $117.9. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

4. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $117.985 through $118.8. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

5. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $119.075 through $119.085. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

6. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $120.215 through $120.76. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

7. Price represents the weighted average sale price for the transaction reported. Price range of shares sold is $121.14 through $121.38. Reporting person undertakes to provide upon request by the SEC staff or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

Remarks:

	/s/ Stan Finkelstein, Attorney-in-fact for Mike Slessor	07/16/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)