Boston Partners

Position in NPKI — NPK International Inc.

CIK 1386060 BOSTON, MA

Position in NPKI

as of Jun 30, 2026 · filed Aug 4, 2026 Compact

Position Value

$665,483

-$17,155 QoQ

Shares Held

41,828

-11.2% QoQ

Ownership

0.049%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#130

of 255 holders

Holding Since

Mar 2020

12 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

Boston Partners holds $597,650,398 across 8 Building Products & Equipment names. NPKI ranks #7 (0.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MAS	Masco Corp /De/	4,606,061	$374,795,181
2	CSL	Carlisle Companies Inc	439,955	$159,593,675
3	LPX	Louisiana-Pacific Corp	330,462	$25,994,139
4	ROCK	Gibraltar Industries, Inc.	464,628	$20,954,722
5	LMB	Limbach Holdings, Inc.	167,873	$12,926,221
6	BLDR	Builders FirstSource, Inc.	28,126	$2,516,714
7	NPKI	NPK International Inc. This page	41,828	$665,483
8	OC	Owens Corning	1,285	$204,263

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$665,483	41,828	-11.2%	Shares	Defined	2026-08-04
2026-03-31	$682,638	47,111	-10.3%	Shares	Defined	2026-05-11
2025-12-31	$626,229	52,536	-30.5%	Shares	Defined	2026-02-13
2025-09-30	$855,454	75,637	-17.7%	Shares	Defined	2025-11-13
2025-06-30	$782,222	91,918	+0.7%	Shares	Defined	2025-08-12
2025-03-31	$530,464	91,302	-95.1%	Shares	Defined	2025-05-13
2024-12-31	$14,315,801	1,866,467	+8.2%	Shares	Other	2025-02-11
2024-09-30	$11,950,202	1,724,416	-1.5%	Shares	Other	2024-11-12
2024-06-30	$14,550,601	1,750,975	+181.5%	Shares	Defined	2024-08-14
2021-09-30	$2,052,682	622,025	+6.0%	Shares	Defined	2021-11-05
2020-06-30	$1,308,144	586,612	+55.8%	Shares	Other	2020-08-12
2020-03-31	$338,934	376,595	—	Shares	Other	2020-05-13
No filing history on record for this holder in this stock.