Round Rock Advisors LLC

Position in NPKI — NPK International Inc.

CIK 1846991 WILTON, CT

Position in NPKI

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$1,471,754

+$131,357 QoQ

Shares Held

92,505

0.0% QoQ

Ownership

0.109%

of shares outstanding

% of Portfolio

0.40%

of 13F equity value

Holder Rank

#89

of 256 holders

Holding Since

Sep 2025

4 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

Round Rock Advisors LLC holds $3,073,925 across 5 Building Products & Equipment names. NPKI ranks #1 (47.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	NPKI	NPK International Inc. This page	92,505	$1,471,754
2	AAON	Aaon, Inc.	4,204	$533,319
3	LPX	Louisiana-Pacific Corp	5,118	$402,581
4	SPXC	SPX Technologies, Inc.	1,511	$370,451
5	CARR	CARRIER GLOBAL Corp	4,033	$295,820

4 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,471,754	92,505	0.0%	Shares	Sole	2026-08-12
2026-03-31	$1,340,397	92,505	+0.4%	Shares	Sole	2026-05-15
2025-12-31	$1,097,998	92,114	+85.9%	Shares	Sole	2026-04-07
2025-09-30	$560,410	49,550	—	Shares	Sole	2025-11-14
No filing history on record for this holder in this stock.