BRIDGEWAY CAPITAL MANAGEMENT, LLC

Position in NPKI — NPK International Inc.

CIK 1107261 HOUSTON, TX

Position in NPKI

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$735,222

-$6,722,204 QoQ

Shares Held

50,740

-91.9% QoQ

Ownership

0.060%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Industrials · as of Mar 31, 2026

BRIDGEWAY CAPITAL MANAGEMENT, LLC holds $14,157,557 across 12 Building Products & Equipment names. NPKI ranks #6 (5.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	NX	Quanex Building Products CORP	291,943	$5,246,215
2	TT	Trane Technologies plc	6,280	$2,617,127
3	PPIH	Perma-Pipe International Holdings, Inc.	68,092	$2,029,822
4	CSL	Carlisle Companies Inc	3,860	$1,287,773
5	JBI	Janus International Group, Inc.	150,231	$773,689
6	NPKI	NPK International Inc. This page	50,740	$735,222
7	SWIM	Latham Group, Inc.	100,972	$542,219
8	APT	Alpha Pro Tech Ltd	78,525	$348,651

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$735,222	50,740	-91.9%	Shares	Sole	2026-05-15
2025-12-31	$7,457,426	625,623	-9.3%	Shares	Sole	2026-02-17
2025-09-30	$7,801,807	689,815	+3.2%	Shares	Sole	2025-11-14
2025-06-30	$5,686,441	668,207	+3.1%	Shares	Sole	2025-08-14
2025-03-31	$3,766,686	648,311	+2.5%	Shares	Sole	2025-05-15
2024-12-31	$4,850,116	632,349	+561.5%	Shares	Sole	2025-02-14
2024-09-30	$662,508	95,600	+5.3%	Shares	Sole	2024-11-14
2024-06-30	$754,348	90,776	+7.7%	Shares	Sole	2024-08-14
2024-03-31	$608,617	84,296	-43.5%	Shares	Sole	2024-05-15
2023-12-31	$991,285	149,290	+9.9%	Shares	Sole	2024-02-14
2023-09-30	$938,723	135,850	-80.4%	Shares	Sole	2023-11-14
2023-06-30	$3,620,462	692,249	-3.9%	Shares	Sole	2023-08-14
2023-03-31	$2,773,289	720,335	-3.6%	Shares	Sole	2023-05-15
2022-12-31	$3,101,295	747,300	-13.9%	Shares	Sole	2023-02-14
2022-09-30	$2,186,100	867,500	-5.4%	Shares	Sole	2022-11-14
2022-06-30	$2,835,075	917,500	-14.1%	Shares	Sole	2022-08-15
2022-03-31	$3,907,050	1,067,500	-4.5%	Shares	Sole	2022-05-16
2021-12-31	$3,285,450	1,117,500	+24.4%	Shares	Sole	2022-02-14
2021-09-30	$2,964,720	898,400	0.0%	Shares	Sole	2021-11-15
2021-06-30	$3,108,464	898,400	-6.3%	Shares	Sole	2021-08-16
2021-03-31	$3,009,376	958,400	+11.6%	Shares	Sole	2021-05-17
2020-12-31	$1,648,128	858,400	+13.2%	Shares	Sole	2021-02-16
2020-09-30	$796,320	758,400	-11.2%	Shares	Sole	2020-11-16
2020-06-30	$1,905,312	854,400	+54.6%	Shares	Sole	2020-08-31
2020-03-31	$497,430	552,700	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.