B Riley Principal Merger Corp

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B Riley Principal Merger Corp
TickerALTG
CIK #0001759824
CUSIP02128L106
SectorReal Estate & Construction - Blank Checks
Address299 Park Avenue, 7th Floor, New York, NY 10171
Source [EDGAR]
CIK Filing 2011 - 2026
[0001759824] 10-K
[0001759824] 10-Q
[0001759824] 3
[0001759824] 4
[0001759824] 8-K
[0001759824] SC 13D
[0001759824] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Castleknight Master Fund LP Alta Equipment Group Inc [2026-07-10] 0.0
Greenhaven Road Investment Management LP Alta Equipment Group Inc [2024-09-04] 5.3
Snowbird Capital LLC Alta Equipment Group Inc [2024-06-03] 81946.2
BlackRock Inc Alta Equipment Group Inc [2024-01-25] 9.3
Mill Road Capital III LP Alta Equipment Group Inc [2023-05-19] 5.0
Voss Capital LLC Alta Equipment Group Inc [2023-03-03] 2.1
Portolan Capital Management LLC Alta Equipment Group Inc [2022-02-04] 5.05
Nantahala Capital Management LLC Alta Equipment Group Inc [2021-02-16] 0.2
Granahan Investment Management Inc/Ma Alta Equipment Group Inc [2021-01-21] 5.2
Integrated Core Strategies US LLC Alta Equipment Group Inc [2020-06-26] 0.0
Greenawalt Ryan Alta Equipment Group Inc [2020-02-24] 24.7
Periscope Capital Inc Alta Equipment Group Inc [2020-02-14] 5.2
Polar Asset Management Partners Inc B Riley Principal Merger Corp [2020-02-10] 6.33
Highbridge Capital Management LLC B Riley Principal Merger Corp [2019-04-18] 7.43
AQR Capital Management LLC B Riley Principal Merger Corp [2019-04-16] 6.58
B Riley Principal Sponsor Co LLC B Riley Principal Merger Corp [2019-04-15] 22.1
Form 3/4/5 Filer 2011 - 2026
Alta Equipment Group Inc
Nair Sidhartha
Wilson Colin
Shribman Daniel
White Katherine E
Studdert Andrew P
Lynch Thomas E
Mill Road Capital III GP LLC
Mill Road Capital III LP
Hoover Jeffrey Alan
Greenawalt Ryan
Colucci Anthony
Voss Value Master Fund LP
Voss Advisors GP LLC
Cocke Travis W
Voss Capital LP
Voss Value-Oriented Special Situations Fund LP
Brubaker Craig
BRC Group Holdings Inc
Riley Bryant R
BRF Investments LLC
FBR Capital Markets & Co
Savas Zachary E
BRC Partners Management GP LLC
B Riley Capital Management LLC
BRC Partners Opportunity Fund LP
B Riley Principal Investments LLC
B Riley Principal Sponsor Co LLC
Kempner James L
Young Kenneth M
Suss Robert
Presutti Timothy M
Bartels Patrick J Jr
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Lynch Thomas E +2
Common Stock, $0.0001 par value
2026-03-13 Buy 3,798 $5.95 22,598
Lynch Thomas E +2
Common Stock, $0.0001 par value
2026-03-12 Buy 58,162 $6.10 354,788
Nair Sidhartha
Common Stock
2026-03-11 Buy 1,000 $6.37 6,370
Lynch Thomas E +2
Common Stock, $0.0001 par value
2026-03-11 Buy 18,040 $6.36 114,734
Nair Sidhartha
Common Stock
2026-03-09 Buy 1,000 $6.75 6,750
Nair Sidhartha
Common Stock
2026-03-05 Buy 1,000 $7.00 7,000
Nair Sidhartha
Common Stock
2026-03-03 Buy 1,000 $7.13 7,130
Greenawalt Ryan
Common Stock
2026-03-03 Sell 27,986 $7.05 197,301
Colucci Anthony
Common Stock
2026-03-03 Sell 8,137 $7.05 57,366
Common Stock
2026-02-27 Grant 11,654
Common Stock
2026-02-27 Grant 17,261
Common Stock
2026-02-27 Grant 80,115
Hoover Jeffrey Alan
Common Stock
2026-02-27 Grant 15,692
Hoover Jeffrey Alan
Common Stock
2026-02-27 Grant 24,956
Colucci Anthony
Common Stock
2026-02-27 Grant 16,849
Colucci Anthony
Common Stock
2026-02-27 Grant 10,595
Greenawalt Ryan
Common Stock
2026-02-27 Grant 72,832
Greenawalt Ryan
Common Stock
2026-02-27 Grant 115,837
Shribman Daniel
Common Stock
2025-12-08 Buy 40,000 $5.07 202,800
White Katherine E
Common Stock
2025-05-30 Grant 20,222
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 126 19,115,738
2025-12-31 116 19,857,636
2025-09-30 134 20,863,678
2025-06-30 105 21,320,618
2025-03-31 101 22,135,901
2024-12-31 106 22,968,386
2024-09-30 104 23,025,683
2024-06-30 118 24,134,469
2024-03-31 126 25,192,063
2023-12-31 118 25,204,912
2023-09-30 113 23,189,763
2023-06-30 112 23,151,241
Form 13F Holdings
Firm Period DFND Voting Shares
Register Financial Advisors LLC [2026-06-30] SOLE 0 146,635
Melone Private Wealth LLC [2026-06-30] SOLE 0 25,157
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 355 13,301
Versant Capital Management Inc [2026-06-30] SOLE 2,896 2,896
Farther Finance Advisors LLC [2026-06-30] SOLE 0 624
Gamma Investing LLC [2026-06-30] DFND 547 547
True Wealth Design LLC [2026-06-30] SOLE 0 122
Fortitude Family Office LLC [2026-06-30] SOLE 60 60
IFP Advisors LLC [2026-06-30] SOLE 42 42
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