Round Rock Advisors LLC

Position in CDNL — Cardinal Infrastructure Group Inc.

CIK 1846991 WILTON, CT

Position in CDNL

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

Position Value

$749,360

New position

Shares Held

18,897

first reported quarter

Ownership

0.044%

of shares outstanding

% of Portfolio

0.27%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2026

1 quarter on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Mar 31, 2026

Round Rock Advisors LLC holds $2,445,253 across 4 Engineering & Construction names. CDNL ranks #2 (30.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MYRG	Myr Group Inc.	3,483	$983,320
2	CDNL	Cardinal Infrastructure Group Inc. This page	18,897	$749,360
3	ACA	Arcosa, Inc.	4,374	$464,256
4	PRIM	Primoris Services Corp	1,736	$248,317

1 filing row on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$749,360	18,897	—	Shares	Sole	2026-05-15
No filing history on record for this holder in this stock.