HARDING BRIAN E 4

4 · Ultra Clean Holdings, Inc. · Filed Jun 8, 2026

Research Summary

AI-generated summary of this filing

Updated Jun 9, 2026

Ultra Clean (UCTT) CAO Brian Harding Sells 16,988 Shares

What Happened
Brian E. Harding, Chief Accounting Officer of Ultra Clean Holdings, sold a total of 16,988 shares in open-market transactions on June 4, 2026 (transaction code S). The sales generated aggregate proceeds of approximately $1,519,892 — an overall weighted-average sale price of roughly $89.47 per share. Individual tranches ranged from 54 shares up to 1,933 shares at prices listed between about $85.54 and $91.82.

Key Details

Transaction date: June 4, 2026; Form 4 filed June 8, 2026 (filing appears timely — within the SEC’s two-business-day window).
Total shares sold: 16,988; total proceeds: ~$1,519,892; weighted-average price: ≈ $89.47/share.
Price range reported across tranches: approx. $85.5350 to $91.8200 (several footnotes indicate tranche-level weighted averages and narrower price ranges).
Shares owned after the transaction: Not disclosed in the provided excerpt of the filing.
Notable footnotes: Multiple footnotes (F1–F21) state that the reported prices are weighted averages for groups of sales and that the reporting person will provide detailed per-price counts on request.

Context

This filing documents outright open-market sales (S). Sales are routinely reported by insiders for diversification, tax planning or other personal reasons and do not by themselves indicate company performance or insider sentiment.
Purchases generally carry more direct signals of insider confidence; this report contains no purchases, option exercises, awards, or gifts.

Insider Transaction Report

Form 4

Period: 2026-06-04

Ultra Clean Holdings, Inc.UCTT

HARDING BRIAN E

Chief Accounting Officer

Transactions

Sale
Common Stock
[F1]
2026-06-04$85.86/sh−196$16,829→ 44,847 total
Sale
Common Stock
[F2]
2026-06-04$87.72/sh−1,176$103,159→ 43,671 total
Sale
Common Stock
[F3]
2026-06-04$88.74/sh−1,933$171,534→ 41,738 total
Sale
Common Stock
[F4]
2026-06-04$89.73/sh−1,407$126,250→ 40,331 total
Sale
Common Stock
[F5]
2026-06-04$90.79/sh−1,876$170,322→ 38,455 total
Sale
Common Stock
[F6]
2026-06-04$91.65/sh−636$58,289→ 37,819 total
Sale
Common Stock
[F7]
2026-06-04$87.25/sh−488$42,578→ 37,331 total
Sale
Common Stock
[F8]
2026-06-04$88.47/sh−1,199$106,076→ 36,132 total
Sale
Common Stock
[F9]
2026-06-04$89.36/sh−886$79,173→ 35,246 total
Sale
Common Stock
[F10]
2026-06-04$90.73/sh−1,277$115,862→ 33,969 total
Sale
Common Stock
[F11]
2026-06-04$91.59/sh−389$35,629→ 33,580 total
Sale
Common Stock
2026-06-04$86.00/sh−54$4,644→ 33,526 total
Sale
Common Stock
[F12]
2026-06-04$87.71/sh−226$19,822→ 33,300 total
Sale
Common Stock
[F13]
2026-06-04$88.76/sh−381$33,818→ 32,919 total
Sale
Common Stock
[F14]
2026-06-04$89.67/sh−169$15,154→ 32,750 total
Sale
Common Stock
[F15]
2026-06-04$90.76/sh−375$34,035→ 32,375 total
Sale
Common Stock
[F16]
2026-06-04$91.63/sh−117$10,721→ 32,258 total
Sale
Common Stock
[F17]
2026-06-04$87.22/sh−496$43,261→ 31,762 total
Sale
Common Stock
[F18]
2026-06-04$88.36/sh−1,002$88,537→ 30,760 total
Sale
Common Stock
[F19]
2026-06-04$89.33/sh−1,056$94,332→ 29,704 total
Sale
Common Stock
[F20]
2026-06-04$90.55/sh−986$89,282→ 28,718 total
Sale
Common Stock
[F21]
2026-06-04$91.38/sh−663$60,585→ 28,055 total

Footnotes (21)

[F1]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $85.5350 to $86.1650. 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 this footnote (1).
[F10]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $90.2150 to $91.0900. 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 this footnote (10).
[F11]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $91.2400 to $91.8200. 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 this footnote (11).
[F12]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $87.3000 to $88.1700. 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 this footnote (12).
[F13]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $88.3650 to $89.2250. 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 this footnote (13).
[F14]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $89.4350 to $90.0900. 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 this footnote (14).
[F15]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $90.4400 to $91.1800. 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 this footnote (15).
[F16]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $91.5350 to $91.8200. 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 this footnote (16).
[F17]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $86.5900 to $87.5000. 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 this footnote (17).
[F18]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $87.7950 to $88.7100. 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 this footnote (18).
[F19]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $88.8200 to $89.7800. 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 this footnote (19).
[F2]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $87.2700 to $88.2550. 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 this footnote (2).
[F20]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $89.9800 to $90.9000. 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 this footnote (20).
[F21]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $90.9900 to $91.8400. 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 this footnote (21).
[F3]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $88.3400 to $89.1900. 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 this footnote (3).
[F4]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $89.3400 to $90.2850. 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 this footnote (4).
[F5]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $90.3400 to $91.1900. 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 this footnote (5).
[F6]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $91.5350 to $91.8600. 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 this footnote (6).
[F7]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $86.8800 to $87.4000. 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 this footnote (7).
[F8]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $87.9900 to $88.9750. 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 this footnote (8).
[F9]This is the weighted average sale price. Shares were sold in multiple transactions at prices from $89.0900 to $89.6400. 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 this footnote (9).

Signature

/s/ Paul Y. Cho, as attorney-in-fact for Brian E. Harding|2026-06-08

Documents

1 file

4
ownership.xmlPrimary
FORM 4