13F Insight
DOSSIER · 13F Holders · Q1 2026Defensive growthQuality
MARA 2.125 09/01/31

MARA HOLDINGS INC

24 institutions still hold MARA HOLDINGS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 565788AD8·24 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 4.5%
vs prior quarter
13F value held
$256M
56.0% inst. owned
of float
Holders
24
+80 QoQ
filers reporting
Activity
+33 / −72
+748 added · −728 reduced
this quarter
Concentration
16.52%
WHITEBOX ADVISORS LLC #1
top holder share
AI Holders Summary · Q1 2026

24 institutions reported MARA 2.125 09/01/31 in Q1 2026. WHITEBOX ADVISORS LLC leads at 16.5% of the visible book. +80 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
WHITEBOX ADVISORS LLC
CIK 0001257391
$42M50.0M0.52%Q1 202602
WOLVERINE ASSET MANAGEMENT LLC
CIK 0001279891
$26M32.8M0.26%Q1 202603
DLD Asset Management, LP
CIK 0001578299
$26M30.0M2.33%Q1 202604
LINDEN ADVISORS LP
CIK 0001279396
$25M29.1M0.14%Q1 202605
CAPSTONE INVESTMENT ADVISORS, LLC
CIK 0001426196
$22M26.3M0.04%Q1 202606
Context Capital Management, LLC
CIK 0001301396
$15M18.0M0.35%Q1 202607
CSS LLC/IL
CIK 0001103646
$14M16.5M0.67%Q1 202608
FMR LLC
CIK 0000315066
$14M16.2M0.00%Q1 202609
LMR Partners LLP
CIK 0001578621
$13M15.0M0.03%Q1 202610
Point72 Asset Management, L.P.
CIK 0001603466
$12M14.2M0.02%Q1 202611
Isabella Capital Management LLP
CIK 0002134988
$12M13.5M8.54%Q1 202612
ADVENT CAPITAL MANAGEMENT /DE/
CIK 0001097278
$11M12.7M0.30%Q1 202613
Calamos Advisors LLC
CIK 0001316507
$6M7.0M0.02%Q1 202614
Sculptor Capital LP
CIK 0001054587
$4M5.0M0.04%Q1 202615
Burkehill Global Management, LP
CIK 0001904549
$4M5.0M0.27%Q4 202516
BlackRock, Inc.
CIK 0002012383
$4M4.7M0.00%Q1 202617
SSI INVESTMENT MANAGEMENT LLC
CIK 0000938487
$2M2.5M0.15%Q1 202618
MORGAN STANLEY
CIK 0000895421
$2M2.4M0.00%Q1 202619
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$1M1.4M0.00%Q1 202620
CITIGROUP INC
CIK 0000831001
$1M1.4M0.00%Q1 2026
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