CASTLEARK MANAGEMENT LLC

Position in FAST — Fastenal Co

CIK 1106832 CHICAGO, IL

Position in FAST

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$6,899,216

+$6,621,517 QoQ

Shares Held

148,690

+2048.7% QoQ

Ownership

0.013%

of shares outstanding

% of Portfolio

0.27%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Industrials · as of Mar 31, 2026

CASTLEARK MANAGEMENT LLC holds $30,323,543 across 5 Industrial Distribution names. FAST ranks #3 (22.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	WCC	Wesco International Inc	28,397	$7,769,987
2	QXO	QXO, Inc.	375,807	$7,298,171
3	FAST	Fastenal Co This page	148,690	$6,899,216
4	GWW	W.W. Grainger, Inc.	5,610	$6,119,444
5	XMTR	Xometry, Inc.	54,768	$2,236,725

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$6,899,216	148,690	+2048.7%	Shares	Sole	2026-05-15
2025-12-31	$277,699	6,920	-94.7%	Shares	Sole	2026-02-13
2025-09-30	$6,366,372	129,820	+1776.0%	Shares	Sole	2025-11-17
2025-06-30	$290,640	6,920	+100.0%	Shares	Sole	2025-08-18
2025-03-31	$134,161	3,460	0.0%	Shares	Sole	2025-05-15
2024-12-31	$124,404	3,460	0.0%	Shares	Sole	2025-02-18
2024-09-30	$123,556	3,460	0.0%	Shares	Sole	2024-11-15
2024-06-30	$108,713	3,460	0.0%	Shares	Sole	2024-08-14
2024-03-31	$133,452	3,460	0.0%	Shares	Sole	2024-05-16
2023-12-31	$112,052	3,460	0.0%	Shares	Sole	2024-02-15
2023-09-30	$94,527	3,460	0.0%	Shares	Sole	2023-11-15
2023-06-30	$102,052	3,460	0.0%	Shares	Sole	2023-08-16
2023-03-31	$93,316	3,460	0.0%	Shares	Sole	2023-05-16
2022-12-31	$81,863	3,460	0.0%	Shares	Sole	2023-02-10
2022-09-30	$79,649	3,460	0.0%	Shares	Sole	2022-11-15
2022-06-30	$86,361	3,460	0.0%	Shares	Sole	2022-08-16
2022-03-31	$102,762	3,460	0.0%	Shares	Sole	2022-05-16
2021-12-31	$110,823	3,460	0.0%	Shares	Sole	2022-02-16
2021-09-30	$89,285	3,460	0.0%	Shares	Sole	2021-11-12
2021-06-30	$89,960	3,460	0.0%	Shares	Sole	2021-08-17
2021-03-31	$86,984	3,460	0.0%	Shares	Sole	2021-05-14
2020-12-31	$84,475	3,460	0.0%	Shares	Sole	2021-02-17
2020-09-30	$78,005	3,460	0.0%	Shares	Sole	2020-11-16
2020-06-30	$74,113	3,460	0.0%	Shares	Sole	2020-08-14
2020-03-31	$54,062	3,460	—	Shares	Sole	2020-05-13
No filing history on record for this holder in this stock.