Calamos Advisors LLC

Position in NPKI — NPK International Inc.

CIK 1316507 NAPERVILLE, IL

Position in NPKI

as of Jun 30, 2026 · filed Jul 31, 2026 Compact

Position Value

$3,668,081

-$1,455,973 QoQ

Shares Held

230,552

-34.8% QoQ

Ownership

0.272%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#59

of 256 holders

Holding Since

Dec 2023

10 quarters on record

Voting authority Sole 99% Shared 0% None 1%

Industrials · as of Jun 30, 2026

Calamos Advisors LLC holds $78,068,181 across 4 Building Products & Equipment names. NPKI ranks #4 (4.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	JCI	Johnson Controls International plc	294,726	$43,062,415
2	CARR	CARRIER GLOBAL Corp	270,674	$19,853,937
3	MAS	Masco Corp /De/	141,130	$11,483,748
4	NPKI	NPK International Inc. This page	230,552	$3,668,081

10 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$3,668,081	230,552	-34.8%	Shares	Other	2026-07-31
2026-03-31	$5,124,054	353,627	-1.1%	Shares	Other	2026-05-04
2025-12-31	$4,262,627	357,603	+5.5%	Shares	Other	2026-01-29
2025-09-30	$3,835,129	339,092	+338.0%	Shares	Other	2025-10-20
2025-06-30	$658,758	77,410	-3.9%	Shares	Other	2025-08-08
2025-03-31	$468,036	80,557	-49.5%	Shares	Sole	2025-04-29
2024-12-31	$1,224,706	159,675	+97.3%	Shares	Sole	2025-01-24
2024-09-30	$560,892	80,937	-35.7%	Shares	Other	2024-11-07
2024-06-30	$1,046,294	125,908	+990.1%	Shares	Other	2024-07-25
2023-12-31	$76,692	11,550	—	Shares	Other	2024-01-31
No filing history on record for this holder in this stock.