13F Insight
DOSSIER · 13F Holders · Q1 2026Basic Materials · Paper MillsCheap mega-capRe-rated
MAGN

MAGNERA CORP

188 institutions still hold MAGNERA CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 55939A107·Paper Mills·188 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 0.8%
vs prior quarter
13F value held
$252M
77.0% inst. owned
of float
Holders
188
+61 QoQ
filers reporting
Activity
+81 / −6
+948 added · −767 reduced
this quarter
Concentration
10.42%
Newtyn Management, LLC #1
top holder share
AI Holders Summary · Q1 2026

188 institutions reported MAGN in Q1 2026. Newtyn Management, LLC leads at 10.4% of the visible book. +61 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
Newtyn Management, LLC
CIK 0001569241
$26M2.8M2.80%Q1 202602
LITTLEJOHN & CO LLC
CIK 0001042537
$23M2.4M21.84%Q1 202603
BlackRock, Inc.
CIK 0002012383
$23M2.4M0.00%Q1 202604
Engine Capital Management, LP
CIK 0001665590
$21M2.2M2.58%Q1 202605
MORGAN STANLEY
CIK 0000895421
$19M2.0M0.00%Q1 202606
Madison Avenue Partners, LP
CIK 0001801265
$15M1.6M0.66%Q1 202607
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$15M1.5M0.00%Q1 202608
D. E. Shaw & Co., Inc.
CIK 0001009207
$12M806K0.01%Q4 202509
DG Capital Management, LLC
CIK 0001512716
$11M1.2M3.52%Q1 202610
Diameter Capital Partners LP
CIK 0001727012
$11M1.2M1.07%Q1 202611
Clearline Capital LP
CIK 0001600136
$10M661K0.49%Q4 202512
BDCM CT, L.L.C.
CIK 0001282197
$9M750K5.28%Q2 202513
CITADEL ADVISORS LLC
CIK 0001423053
$9M588K0.00%Q4 202514
CANYON CAPITAL ADVISORS LLC
CIK 0001074034
$8M810K1.00%Q1 202615
JPMORGAN CHASE & CO
CIK 0000019617
$7M829K0.00%Q1 202616
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$7M780K0.00%Q1 202617
Assenagon Asset Management S.A.
CIK 0001546007
$7M742K0.01%Q1 202618
STATE STREET CORP
CIK 0000093751
$6M657K0.00%Q1 202619
JB CAPITAL PARTNERS LP
CIK 0001138532
$6M655K1.07%Q1 202620
JACOBS LEVY EQUITY MANAGEMENT, INC
CIK 0000884414
$5M525K0.02%Q1 2026
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