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Equibles

Round Rock Advisors LLC

Position in MMM — 3M Co

CIK 1846991 WILTON, CT
Back to MMM Full portfolio

Position in MMM

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$786,558
+$83,500 QoQ
Shares Held
4,858
+0.4% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.21%
of 13F equity value
Holder Rank
#1,017
of 2,205 holders
Holding Since
Dec 2020
22 quarters on record
Voting authority Sole 0% Shared 0% None 100%

Common Shares in MMM Over Time

Shares Held

Position Value (USD)

Position in Conglomerates

Industrials · as of Jun 30, 2026

Round Rock Advisors LLC holds $2,286,363 across 3 Conglomerates names. MMM ranks #2 (34.4% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 HON
Honeywell International Inc
 4,480 $1,003,072
2 MMM
3M Co
This page 		4,858 $786,558
3 TUSK
Mammoth Energy Services, Inc.
 152,841 $496,733

All Filings in MMM

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22 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $786,558 4,858
2026-03-31 $703,058 4,841
2025-12-31 $1,096,204 6,847
2025-09-30 $1,065,465 6,866
2025-06-30 $963,070 6,326
2025-03-31 $914,497 6,227
2024-12-31 $612,402 4,744
2024-09-30 $669,146 4,895
2024-06-30 $498,380 4,877
2023-12-31 $541,462 4,953
2023-09-30 $562,937 6,013
2023-06-30 $595,635 5,951
2023-03-31 $618,887 5,888
2022-12-31 $706,089 5,888
2022-09-30 $650,623 5,888
2022-06-30 $219,867 1,699
2022-03-31 $262,326 1,762
2021-12-31 $326,128 1,836
2021-09-30 $280,496 1,599
2021-06-30 $317,609 1,599
2021-03-31 $306,553 1,591
2020-12-31 $248,900 1,424