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WELLINGTON MANAGEMENT GROUP LLP

Position in NPKI — NPK International Inc.

CIK 902219 Boston, MA

Position in NPKI

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$12,574,229
+$8,739,929 QoQ
Shares Held
790,335
+198.7% QoQ
Ownership
0.931%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#31
of 255 holders
Holding Since
Jun 2022
15 quarters on record
Voting authority Sole 0% Shared 76% None 24%

Common Shares in NPKI Over Time

Shares Held

Position Value (USD)

Position in Building Products & Equipment

Industrials · as of Jun 30, 2026

WELLINGTON MANAGEMENT GROUP LLP holds $4,364,566,580 across 14 Building Products & Equipment names. NPKI ranks #13 (0.3% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in NPKI

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15 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $12,574,229 790,335
2026-03-31 $3,834,300 264,617
2025-12-31 $6,038,636 506,597
2025-09-30 $7,483,793 661,697
2025-06-30 $5,631,041 661,697
2025-03-31 $3,446,660 593,229
2024-12-31 $2,461,525 320,929
2024-09-30 $3,827,639 552,329
2024-06-30 $8,733,810 1,051,000
2024-03-31 $7,323,246 1,014,300
2023-12-31 $4,704,440 708,500
2023-09-30 $6,047,632 875,200
2023-06-30 $3,799,595 726,500
2023-03-31 $1,072,610 278,600
2022-06-30 $1,059,870 343,000