FRONTIER CAPITAL MANAGEMENT CO LLC

Position in UCTT — Ultra Clean Holdings, Inc.

CIK 351173 Boston, MA

Back to UCTT Full portfolio

Position in UCTT

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$95,183,387

-$15,960,316 QoQ

Shares Held

667,532

-62.7% QoQ

Ownership

1.47%

of shares outstanding

% of Portfolio

0.89%

of 13F equity value

Holder Rank

#13

of 435 holders

Holding Since

Mar 2020

19 quarters on record

Voting authority Sole 54% Shared 0% None 46%

Common Shares in UCTT Over Time

Shares Held

Position Value (USD)

Position in Semiconductor Equipment & Materials

Technology · as of Jun 30, 2026

FRONTIER CAPITAL MANAGEMENT CO LLC holds $221,872,131 across 5 Semiconductor Equipment & Materials names. UCTT ranks #1 (42.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	UCTT	Ultra Clean Holdings, Inc. This page	667,532	$95,183,387
2	ENTG	Entegris Inc	351,950	$63,301,727
3	TER	Teradyne, Inc	84,563	$40,914,961
4	COHU	Cohu Inc	200,834	$14,843,640
5	ONTO	Onto Innovation Inc.	20,157	$7,628,416

All Filings in UCTT

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20 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$95,183,387	667,532	-62.7%	Shares	Sole	2026-08-14
2026-03-31	$111,143,703	1,787,451	-49.1%	Shares	Sole	2026-05-15
2025-12-31	$88,904,221	3,509,839	—	Shares	Sole	2026-02-17
2025-12-31	$88,904,221	3,509,839	+15.7%	Shares	Sole	2026-02-17
2025-09-30	$82,656,607	3,033,270	+10.1%	Shares	Sole	2025-11-14
2025-06-30	$62,161,458	2,754,163	+41.5%	Shares	Sole	2025-08-14
2025-03-31	$41,661,419	1,945,886	-8.6%	Shares	Sole	2025-05-15
2024-12-31	$76,577,310	2,130,106	-2.2%	Shares	Sole	2025-02-14
2024-09-30	$86,974,887	2,178,184	-27.5%	Shares	Sole	2024-11-14
2024-06-30	$147,127,449	3,002,601	+4.7%	Shares	Sole	2024-08-14
2024-03-31	$131,761,340	2,868,118	+12.0%	Shares	Sole	2024-05-15
2023-12-31	$87,396,454	2,559,943	+37.5%	Shares	Sole	2024-02-14
2023-09-30	$55,236,668	1,861,701	+16.4%	Shares	Sole	2023-11-14
2023-06-30	$61,508,001	1,599,272	+49.3%	Shares	Sole	2023-08-14
2023-03-31	$35,523,744	1,071,283	+76.0%	Shares	Sole	2023-05-15
2022-12-31	$20,174,393	608,579	+16.8%	Shares	Sole	2023-02-14
2020-12-31	$16,231,579	521,078	-47.7%	Shares	Sole	2021-01-19
2020-09-30	$21,373,580	995,973	-27.0%	Shares	Sole	2020-11-16
2020-06-30	$30,895,358	1,365,239	-14.9%	Shares	Sole	2020-07-17
2020-03-31	$22,126,795	1,603,391	—	Shares	Sole	2020-04-16
No filing history on record for this holder in this stock.