ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

Position in NPKI — NPK International Inc.

CIK 1164508 BOSTON, MA

Back to NPKI Full portfolio

Position in NPKI

as of Jun 30, 2026 · filed Aug 13, 2026 Compact

Position Value

$18,050,722

-$4,250,663 QoQ

Shares Held

1,134,552

-26.3% QoQ

Ownership

1.34%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

#19

of 255 holders

Holding Since

Jun 2020

21 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in NPKI Over Time

Shares Held

Position Value (USD)

Position in Building Products & Equipment

Industrials · as of Jun 30, 2026

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $682,407,570 across 16 Building Products & Equipment names. NPKI ranks #8 (2.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	OC	Owens Corning	957,875	$152,263,810
2	MAS	Masco Corp /De/	1,276,438	$103,863,760
3	TT	Trane Technologies plc	196,490	$96,508,028
4	TREX	Trex Co Inc	1,766,003	$88,370,790
5	BLDR	Builders FirstSource, Inc.	915,658	$81,933,077
6	AWI	Armstrong World Industries Inc	453,190	$72,700,739
7	WMS	Advanced Drainage Systems, Inc.	225,799	$35,441,411
8	NPKI	NPK International Inc. This page	1,134,552	$18,050,722

All Filings in NPKI

Export CSV

21 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$18,050,722	1,134,552	-26.3%	Shares	Defined	2026-08-13
2026-03-31	$22,301,385	1,539,088	+46.3%	Shares	Defined	2026-05-14
2025-12-31	$12,542,724	1,052,242	+19.1%	Shares	Defined	2026-02-13
2025-09-30	$9,993,188	883,571	+173.8%	Shares	Defined	2025-11-13
2025-06-30	$2,746,474	322,735	-39.5%	Shares	Defined	2025-08-13
2024-09-30	$3,698,728	533,727	-48.1%	Shares	Defined	2024-11-14
2024-06-30	$8,548,854	1,028,743	+62.6%	Shares	Defined	2024-08-14
2024-03-31	$4,566,917	632,537	+5.3%	Shares	Defined	2024-05-15
2023-12-31	$3,987,884	600,585	-45.4%	Shares	Defined	2024-02-14
2023-09-30	$7,593,924	1,098,976	+59.8%	Shares	Defined	2023-11-14
2023-06-30	$3,597,214	687,804	+125.4%	Shares	Defined	2023-08-14
2023-03-31	$1,174,993	305,193	+79.8%	Shares	Defined	2023-05-15
2022-12-31	$704,346	169,722	-64.4%	Shares	Defined	2023-02-14
2022-06-30	$1,472,323	476,480	+286.8%	Shares	Defined	2022-08-15
2022-03-31	$450,897	123,196	+14.8%	Shares	Defined	2022-05-13
2021-12-31	$315,526	107,322	-87.9%	Shares	Defined	2022-02-14
2021-06-30	$3,065,431	885,963	0.0%	Shares	Defined	2021-08-13
2021-03-31	$2,781,923	885,963	0.0%	Shares	Defined	2021-05-14
2020-12-31	$1,701,048	885,963	+26.4%	Shares	Defined	2021-02-12
2020-09-30	$735,801	700,763	+5.4%	Shares	Defined	2020-11-12
2020-06-30	$1,483,081	665,059	—	Shares	Defined	2020-08-12
No filing history on record for this holder in this stock.