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  4. [Form 4] Ultra Clean Holdings, Inc. Insider Trading Activity

Ultra Clean (NASDAQ: UCTT) CAO Brian Harding sells 3,837 shares under 10b5-1 plan

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Ultra Clean Holdings, Inc. Chief Accounting Officer Brian E. Harding reported open-market sales of a total of 3,837 shares of common stock on July 2, 2026. The sales were executed in three tranches at weighted average prices of about $126.92, $128.37 and $130.12 per share, with individual trades occurring within specified price ranges. The transactions were carried out under a pre-arranged Rule 10b5-1 trading plan, indicating they were scheduled in advance rather than timed discretionarily. After these sales, Harding continues to directly hold 33,581 shares of Ultra Clean common stock.

Positive

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Negative

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Insider HARDING BRIAN E
Role Chief Accounting Officer
Sold 3,837 shs ($494K)
Type Security Shares Price Value
Sale Common Stock 440 $126.9161 $56K
Sale Common Stock 2,194 $128.3673 $282K
Sale Common Stock 1,203 $130.1235 $157K
Holdings After Transaction: Common Stock — 33,581 shares (Direct)
Footnotes (4)
  1. F1. The sale reported was effected by the reporting person pursuant to the Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2026.
  2. F2. This is the weighted average sale price. Shares were sold in multiple transactions at prices from $126.3500 to $127.1650. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.
  3. F3. This is the weighted average sale price. Shares were sold in multiple transactions at prices from $127.5050 to $128.5000. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4.
  4. F4. This is the weighted average sale price. Shares were sold in multiple transactions at prices from $129.5900 to $130.2400. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (4) to this Form 4.
Total shares sold 3,837 shares Net open-market sales on July 2, 2026
Tranche 1 average price $126.9161 per share Weighted average sale price for 440-share tranche
Tranche 2 average price $128.3673 per share Weighted average sale price for 2,194-share tranche
Tranche 3 average price $130.1235 per share Weighted average sale price for 1,203-share tranche
Shares held after transactions 33,581 shares Direct ownership after reported sales
Rule 10b5-1 trading plan regulatory
"The sale reported was effected by the reporting person pursuant to the Rule 10b5-1 trading plan adopted by the reporting person"
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
"This is the weighted average sale price. Shares were sold in multiple transactions"
open-market sale financial
"transaction_action: open-market sale"
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.
Form 4 regulatory
"within the range set forth in footnote (2) to this Form 4"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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

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FAQ

What insider transaction did UCTT Chief Accounting Officer Brian Harding report?
Brian Harding reported selling 3,837 shares of Ultra Clean Holdings common stock. The transactions were open-market sales executed in three tranches on July 2, 2026, at different weighted average prices within disclosed price ranges, under a pre-arranged Rule 10b5-1 trading plan.

At what prices did Brian Harding sell UCTT shares in this Form 4 filing?
Brian Harding’s reported UCTT share sales occurred at weighted average prices of about $126.92, $128.37 and $130.12 per share. Footnotes state each tranche consisted of multiple trades within specified ranges between $126.35 and $130.24, with full trade details available upon request.

How many UCTT shares does Brian Harding hold after these reported sales?
After the reported open-market sales, Brian Harding holds 33,581 shares of Ultra Clean Holdings common stock directly. This post-transaction balance shown in the Form 4 indicates that the 3,837 shares sold represent only a portion of his overall direct equity position in the company.

Were Brian Harding’s UCTT share sales made under a Rule 10b5-1 plan?
Yes, the Form 4 footnotes state the sale was effected under a Rule 10b5-1 trading plan adopted by Brian Harding. Such plans pre-schedule transactions, meaning the timing of these UCTT sales was set in advance rather than decided at the moment of trading.

How many UCTT shares did Brian Harding sell in total on July 2, 2026?
On July 2, 2026, Brian Harding sold a total of 3,837 Ultra Clean Holdings shares. The Form 4 shows three separate open-market sale entries of 1,203 shares, 2,194 shares and 440 shares, each with its own weighted average sale price and price range disclosure.
SEC Form 4
FORM 4UNITED 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*
HARDING BRIAN E
(Last)(First)(Middle)
ULTRA CLEAN HOLDINGS, INC.
26462 CORPORATE AVE
(Street)
HAYWARD CALIFORNIA 94545
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
Ultra Clean Holdings, Inc. [ UCTT ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Accounting Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/02/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock07/02/2026S440(1)D$126.9161(2)36,978D
Common Stock07/02/2026S2,194(1)D$128.3673(3)34,784D
Common Stock07/02/2026S1,203(1)D$130.1235(4)33,581D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The sale reported was effected by the reporting person pursuant to the Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2026.
2. This is the weighted average sale price. Shares were sold in multiple transactions at prices from $126.3500 to $127.1650. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.
3. This is the weighted average sale price. Shares were sold in multiple transactions at prices from $127.5050 to $128.5000. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4.
4. This is the weighted average sale price. Shares were sold in multiple transactions at prices from $129.5900 to $130.2400. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (4) to this Form 4.
/s/ Paul Y. Cho, as attorney-in-fact for Brian E. Harding07/07/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR