HARDING BRIAN E (Chief Accounting Officer) sold 37.7% of their position (16.99K shares) of ULTRA CLEAN HOLDINGS, INC. on the open market

Open‑market sale worth $1.52M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 22 sales

HARDING BRIAN E

Filed: 6/8/2026ACC: 0000950103-26-008671

InsiderHARDING BRIAN ECIK 1672993

→

IssuerULTRA CLEAN HOLDINGS, INC.CIK 1275014

Officer· Chief Accounting Officer

Since Jun 2022

-16.99K

Net shares

Net seller

$1.52M

Total sold

Open market trades

0B · 22S

Total transactions

16.99K disposed

Non-Derivative Transactions22

Common Stock

Direct

S · Sale

−196.00

Price / share

$85.86

Trade value

$16.83K

% of position

0.4%

6/4/2026

45.04K→44.85K

Common Stock

Direct

S · Sale

−1.18K

Price / share

$87.72

Trade value

$103.16K

% of position

2.6%

6/4/2026

44.85K→43.67K

Common Stock

Direct

S · Sale

−1.93K

Price / share

$88.74

Trade value

$171.53K

% of position

4.4%

6/4/2026

43.67K→41.74K

Common Stock

Direct

S · Sale

−1.41K

Price / share

$89.73

Trade value

$126.25K

% of position

3.4%

6/4/2026

41.74K→40.33K

Common Stock

Direct

S · Sale

−1.88K

Price / share

$90.79

Trade value

$170.32K

% of position

4.7%

6/4/2026

40.33K→38.45K

Common Stock

Direct

S · Sale

−636.00

Price / share

$91.65

Trade value

$58.29K

% of position

1.7%

6/4/2026

38.45K→37.82K

Common Stock

Direct

S · Sale

−488.00

Price / share

$87.25

Trade value

$42.58K

% of position

1.3%

6/4/2026

37.82K→37.33K

Common Stock

Direct

S · Sale

−1.20K

Price / share

$88.47

Trade value

$106.08K

% of position

3.2%

6/4/2026

37.33K→36.13K

Common Stock

Direct

S · Sale

−886.00

Price / share

$89.36

Trade value

$79.17K

% of position

2.5%

6/4/2026

36.13K→35.25K

Common Stock

Direct

S · Sale

−1.28K

Price / share

$90.73

Trade value

$115.86K

% of position

3.6%

6/4/2026

35.25K→33.97K

Common Stock

Direct

S · Sale

−389.00

Price / share

$91.59

Trade value

$35.63K

% of position

1.1%

6/4/2026

33.97K→33.58K

Common Stock

Direct

S · Sale

−54.00

Price / share

$86.00

Trade value

$4.64K

% of position

0.2%

6/4/2026

33.58K→33.53K

Common Stock

Direct

S · Sale

−226.00

Price / share

$87.71

Trade value

$19.82K

% of position

0.7%

6/4/2026

33.53K→33.30K

Common Stock

Direct

S · Sale

−381.00

Price / share

$88.76

Trade value

$33.82K

% of position

1.1%

6/4/2026

33.30K→32.92K

Common Stock

Direct

S · Sale

−169.00

Price / share

$89.67

Trade value

$15.15K

% of position

0.5%

6/4/2026

32.92K→32.75K

Common Stock

Direct

S · Sale

−375.00

Price / share

$90.76

Trade value

$34.03K

% of position

1.1%

6/4/2026

32.75K→32.38K

Common Stock

Direct

S · Sale

−117.00

Price / share

$91.63

Trade value

$10.72K

% of position

0.4%

6/4/2026

32.38K→32.26K

Common Stock

Direct

S · Sale

−496.00

Price / share

$87.22

Trade value

$43.26K

% of position

1.5%

6/4/2026

32.26K→31.76K

Common Stock

Direct

S · Sale

−1K

Price / share

$88.36

Trade value

$88.54K

% of position

3.2%

6/4/2026

31.76K→30.76K

Common Stock

Direct

S · Sale

−1.06K

Price / share

$89.33

Trade value

$94.33K

% of position

3.4%

6/4/2026

30.76K→29.70K

Common Stock

Direct

S · Sale

−986.00

Price / share

$90.55

Trade value

$89.28K

% of position

3.3%

6/4/2026

29.70K→28.72K

Common Stock

Direct

S · Sale

−663.00

Price / share

$91.38

Trade value

$60.58K

% of position

2.3%

6/4/2026

28.72K→28.05K

Total

Net shares

−16.99K

Net value

-$1.52M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	6/4/2026	S · Sale	−196.00	$85.86	$16.83K	0.4%	45.04K	44.85K
Common Stock Direct	6/4/2026	S · Sale	−1.18K	$87.72	$103.16K	2.6%	44.85K	43.67K
Common Stock Direct	6/4/2026	S · Sale	−1.93K	$88.74	$171.53K	4.4%	43.67K	41.74K
Common Stock Direct	6/4/2026	S · Sale	−1.41K	$89.73	$126.25K	3.4%	41.74K	40.33K
Common Stock Direct	6/4/2026	S · Sale	−1.88K	$90.79	$170.32K	4.7%	40.33K	38.45K
Common Stock Direct	6/4/2026	S · Sale	−636.00	$91.65	$58.29K	1.7%	38.45K	37.82K
Common Stock Direct	6/4/2026	S · Sale	−488.00	$87.25	$42.58K	1.3%	37.82K	37.33K
Common Stock Direct	6/4/2026	S · Sale	−1.20K	$88.47	$106.08K	3.2%	37.33K	36.13K
Common Stock Direct	6/4/2026	S · Sale	−886.00	$89.36	$79.17K	2.5%	36.13K	35.25K
Common Stock Direct	6/4/2026	S · Sale	−1.28K	$90.73	$115.86K	3.6%	35.25K	33.97K
Common Stock Direct	6/4/2026	S · Sale	−389.00	$91.59	$35.63K	1.1%	33.97K	33.58K
Common Stock Direct	6/4/2026	S · Sale	−54.00	$86.00	$4.64K	0.2%	33.58K	33.53K
Common Stock Direct	6/4/2026	S · Sale	−226.00	$87.71	$19.82K	0.7%	33.53K	33.30K
Common Stock Direct	6/4/2026	S · Sale	−381.00	$88.76	$33.82K	1.1%	33.30K	32.92K
Common Stock Direct	6/4/2026	S · Sale	−169.00	$89.67	$15.15K	0.5%	32.92K	32.75K
Common Stock Direct	6/4/2026	S · Sale	−375.00	$90.76	$34.03K	1.1%	32.75K	32.38K
Common Stock Direct	6/4/2026	S · Sale	−117.00	$91.63	$10.72K	0.4%	32.38K	32.26K
Common Stock Direct	6/4/2026	S · Sale	−496.00	$87.22	$43.26K	1.5%	32.26K	31.76K
Common Stock Direct	6/4/2026	S · Sale	−1K	$88.36	$88.54K	3.2%	31.76K	30.76K
Common Stock Direct	6/4/2026	S · Sale	−1.06K	$89.33	$94.33K	3.4%	30.76K	29.70K
Common Stock Direct	6/4/2026	S · Sale	−986.00	$90.55	$89.28K	3.3%	29.70K	28.72K
Common Stock Direct	6/4/2026	S · Sale	−663.00	$91.38	$60.58K	2.3%	28.72K	28.05K
Total			−16.99K		-$1.52M

Derivative Transactions0

No derivative transactions reported