Granahan Investment Management, LLC
Position in NPKI — NPK International Inc.
CIK 1026710
WALTHAM, MA
Position in NPKI
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$3,519,673
-$2,300,351 QoQ
Shares Held
221,224
-44.9% QoQ
Ownership
0.261%
of shares outstanding
% of Portfolio
0.13%
of 13F equity value
Holder Rank
#61
of 255 holders
Holding Since
Jun 2024
9 quarters on record
Voting authority
Sole 94%
Shared 0%
None 6%
Common Shares in NPKI Over Time
Shares Held
Position Value (USD)
Position in Building Products & Equipment
Industrials · as of Jun 30, 2026Granahan Investment Management, LLC holds $17,337,347 across 2 Building Products & Equipment names. NPKI ranks #2 (20.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ARLO |
Arlo Technologies, Inc.
|
1,025,050 | $13,817,674 | |
| 2 | NPKI |
NPK International Inc.
This page
|
221,224 | $3,519,673 |
All Filings in NPKI
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9 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $3,519,673 | 221,224 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $5,820,024 | 401,658 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $6,918,928 | 580,447 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $5,654,321 | 499,940 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $5,594,984 | 657,460 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $4,511,058 | 776,430 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $5,412,772 | 705,707 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $4,739,364 | 683,891 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $2,960,404 | 356,246 | Shares | Sole | 2024-08-14 | |
| No filing history on record for this holder in this stock. | ||||||