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CASTLEARK MANAGEMENT LLC

Position in FAST — Fastenal Co

CIK 1106832 CHICAGO, IL

Position in FAST

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$8,233,302
+$1,334,086 QoQ
Shares Held
171,420
+15.3% QoQ
Ownership
0.015%
of shares outstanding
% of Portfolio
0.25%
of 13F equity value
Holder Rank
#309
of 1,458 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in FAST Over Time

Shares Held

Position Value (USD)

Position in Industrial Distribution

Industrials · as of Jun 30, 2026

CASTLEARK MANAGEMENT LLC holds $51,203,494 across 6 Industrial Distribution names. FAST ranks #4 (16.1% of the industry book) .

# Ticker Company Shares Value (USD) Open
4 FAST
Fastenal Co
This page
171,420 $8,233,302

All Filings in FAST

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $8,233,302 171,420
2026-03-31 $6,899,216 148,690
2025-12-31 $277,699 6,920
2025-09-30 $6,366,372 129,820
2025-06-30 $290,640 6,920
2025-03-31 $268,323 3,460
2024-12-31 $248,808 3,460
2024-09-30 $247,113 3,460
2024-06-30 $217,426 3,460
2024-03-31 $266,904 3,460
2023-12-31 $224,104 3,460
2023-09-30 $189,054 3,460
2023-06-30 $204,105 3,460
2023-03-31 $186,632 3,460
2022-12-31 $163,727 3,460
2022-09-30 $159,298 3,460
2022-06-30 $172,723 3,460
2022-03-31 $205,524 3,460
2021-12-31 $221,647 3,460
2021-09-30 $178,570 3,460
2021-06-30 $179,920 3,460
2021-03-31 $173,968 3,460
2020-12-31 $168,951 3,460
2020-09-30 $156,011 3,460
2020-06-30 $148,226 3,460
2020-03-31 $108,125 3,460