Vault-13

MAGNERA CORP MAGN

COM SHS · Common Stock · CUSIP 55939A107

180 institutional holders +4 vs Q1 2026
36,772,15836.8m shares reported held*
102.7% of all shares outstanding*
$432.2mreported value*
28 new 65 added 42 reduced 21 sold out net bought ≈ $3.7m (+315.9k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($2.2m this quarter). Holder counts are more reliable. Shares outstanding: 35.8m as of 2026-08-06, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $11.75. Options: 2 managers hold calls ($159.8k notional), 0 hold puts (—).

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0100200300Q3 22: 1Q4 22: 1Q1 23: 1Q2 23: 1Q3 23: 0Q4 23: 0Q1 24: 0Q2 24: 0Q3 24: 4Q4 24: 233Q1 25: 217Q2 25: 191Q3 25: 181Q4 25: 190Q1 26: 176Q2 26: 180180Q3 22Q3 23Q3 24Q3 25Q2 26
Numbers
QuarterHolders
Q3 20221
Q4 20221
Q1 20231
Q2 20231
Q3 20230
Q4 20230
Q1 20240
Q2 20240
Q3 20244
Q4 2024233
Q1 2025217
Q2 2025191
Q3 2025181
Q4 2025190
Q1 2026176
Q2 2026180

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
4000400Q3 23: 0 bought or addedQ3 23: 1 cut or sold outQ4 24: 214 bought or addedQ4 24: 0 cut or sold outQ4 24Q1 25: 83 bought or addedQ1 25: 116 cut or sold outQ2 25: 94 bought or addedQ2 25: 113 cut or sold outQ2 25Q3 25: 70 bought or addedQ3 25: 99 cut or sold outQ4 25: 94 bought or addedQ4 25: 102 cut or sold outQ4 25Q1 26: 82 bought or addedQ1 26: 88 cut or sold outQ2 26: 93 bought or addedQ2 26: 63 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 202301
Q4 20242140
Q1 202583116
Q2 202594113
Q3 20257099
Q4 202594102
Q1 20268288
Q2 20269363

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$2m$4m$6m$8mQ3 25 calls: $6.9mQ3 25 puts: $5.9mQ3 25P/C 0.85Q4 25 calls: $994.7kQ4 25 puts: $99.9kQ4 25P/C 0.10Q1 26 calls: $1.6mQ1 26 puts: $0Q1 26P/C 0.00Q2 26 calls: $159.8kQ2 26 puts: $0Q2 26P/C 0.00
Numbers
QuarterCallsPutsP/C
Q3 2025$6.9m$5.9m0.85
Q4 2025$994.7k$99.9k0.10
Q1 2026$1.6m$00.00
Q2 2026$159.8k$00.00

Biggest buyers

SG Americas Securities, LLC New +397,523+397.5k
AMERICAN CENTURY COMPANIES INC Added +378,858+378.9k
Assenagon Asset Management S.A. Added +375,489+375.5k
AQR CAPITAL MANAGEMENT LLC Added +333,970+334.0k
DIMENSIONAL FUND ADVISORS LP Added +317,436+317.4k
UBS Group AG Added +212,788+212.8k
BlackRock, Inc. Added +206,571+206.6k
PRIVATE MANAGEMENT GROUP INC New +186,728+186.7k
Verition Fund Management LLC Added +175,000+175.0k
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Added +115,001+115.0k

Biggest sellers

LITTLEJOHN & CO LLC Reduced -536,730-536.7k
MORGAN STANLEY Reduced -433,638-433.6k
Ancora Advisors LLC Reduced -350,389-350.4k
Madison Avenue Partners, LP Reduced -288,550-288.6k
JPMORGAN CHASE & CO Reduced -217,934-217.9k
Russell Investments Group, Ltd. Reduced -202,840-202.8k
MILLENNIUM MANAGEMENT LLC Sold out -199,969-200.0k
CITADEL ADVISORS LLC Reduced -179,534-179.5k
TUDOR INVESTMENT CORP ET AL Reduced -121,755-121.8k
Trexquant Investment LP Reduced -112,128-112.1k

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $155.1k13.2k shares
SIMPLEX TRADING, LLC Reduced $4.7k400 shares

Biggest puts

None

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Newtyn Management, LLC 13G · institution +1.3 pts · filed 2026-05-15 7.7% +1.3 pts 2.8m≈ $32.4m 2026-05-15
BlackRock, Inc. 13G · institution new · filed 2025-07-17 7.1% new 2.5m≈ $29.6m 2025-07-17

Fell to 5% or below in the last year: MORGAN STANLEY (3.9%, 2026-08-12), Cetus Capital VI, L.P. (4.4%, 2026-08-05), Madison Avenue Partners, LP (4.4%, 2026-05-15), VANGUARD GROUP INC (0.0%, 2026-03-27), Ancora Advisors LLC (1.5%, 2026-02-13)

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
10010Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 2 buyingQ1 25: 0 sellingQ1 25Q2 25: 7 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 0 buyingQ4 25: 0 sellingQ1 26: 0 buyingQ1 26: 0 sellingQ1 26Q2 26: 0 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20252$908.0k0——
Q2 20257$1.4m0——
Q3 20250—0——
Q4 20250—0——
Q1 20260—0——
Q2 20260—0——
Q3 20260—0——

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Newtyn Management, LLC 4.11% of their portfolio NEW YORK, NY 2,800,0002.8m $32.9m $32.9m 4.11% Added +40.0k +40,000
2 BlackRock, Inc. 0.00% of their portfolio New York, NY 2,596,5782.6m $30.5m $30.5m 0.00% Added +206.6k +206,571
3 Engine Capital Management, LP 2.57% of their portfolio NEW YORK, NY 2,243,8272.2m $26.4m $26.4m 2.57% Unchanged
4 LITTLEJOHN & CO LLC 28.25% of their portfolio GREENWICH, CT 1,889,0881.9m $22.2m $22.2m 28.25% Reduced -536.7k -536,730
5 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 1,563,1111.6m $18.4m $18.4m 0.00% Added +29.8k +29,834
6 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 1,534,1931.5m $18.0m $18.0m 0.00% Reduced -433.6k -433,638
7 Madison Avenue Partners, LP 0.66% of their portfolio NEW YORK, NY 1,302,0661.3m $15.3m $15.3m 0.66% Reduced -288.6k -288,550
8 Diameter Capital Partners LP 1.51% of their portfolio New York, NY 1,205,7931.2m $14.2m $14.2m 1.51% Unchanged
9 Assenagon Asset Management S.A. 0.01% of their portfolio SENNINGERBERG, N4 1,117,9141.1m $13.1m $13.1m 0.01% Added +375.5k +375,489
10 DG Capital Management, LLC 4.48% of their portfolio NEW YORK, NY 1,101,4761.1m $12.9m $12.9m 4.48% Reduced -105.9k -105,880
11 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 862,384862.4k $10.1m $10.1m 0.00% Added +82.1k +82,126
12 CANYON CAPITAL ADVISORS LLC 1.08% of their portfolio DALLAS, TX 810,000810.0k $9.5m $9.5m 1.08% Unchanged
13 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 789,745789.7k $9.3m $9.3m 0.01% Reduced -106.5k -106,470
14 Clearline Capital LP 0.56% of their portfolio NEW YORK, NY 741,096741.1k $8.7m $8.7m 0.56% Added +2.8k +2,779
15 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 671,927671.9k $7.9m $7.9m 0.00% Added +15.1k +15,059
16 JB CAPITAL PARTNERS LP 1.20% of their portfolio Armonk, NY 655,000655.0k $7.7m $7.7m 1.20% Unchanged
17 THOMPSON SIEGEL & WALMSLEY LLC 0.14% of their portfolio RICHMOND, VA 649,806649.8k $7.6m $7.6m 0.14% Added +75.5k +75,542
18 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 610,865610.9k $7.2m $7.2m 0.00% Reduced -217.9k -217,934
19 Verition Fund Management LLC 0.05% of their portfolio GREENWICH, CT 607,303607.3k $7.1m $7.1m 0.05% Added +175.0k +175,000
20 JACOBS LEVY EQUITY MANAGEMENT, INC 0.03% of their portfolio FLORHAM PARK, NJ 601,599601.6k $7.1m $7.1m 0.03% Added +76.7k +76,709
21 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 599,991600.0k $7.0m $7.0m 0.00% Added +378.9k +378,858
22 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 578,498578.5k $6.8m $6.8m 0.00% Added +70.0k +69,973
23 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 571,344571.3k $6.7m $6.7m 0.00% Added +317.4k +317,436
24 UBS Group AG 0.00% of their portfolio ZURICH, V8 506,934506.9k $6.0m $6.0m 0.00% Added +212.8k +212,788
25 AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio Greenwich, CT 479,549479.5k $5.6m $5.6m 0.00% Added +334.0k +333,970
26 ALGERT GLOBAL LLC 0.06% of their portfolio SAN FRANCISCO, CA 447,367447.4k $5.3m $5.3m 0.06% Added +53.8k +53,752
27 J. Goldman & Co LP 0.18% of their portfolio NEW YORK, NY 424,989425.0k $5.0m $5.0m 0.18% Added +37.7k +37,708
28 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 423,311423.3k $5.0m $5.0m 0.00% Reduced -30.4k -30,386
29 Seven Six Capital Management, LLC 4.28% of their portfolio NEW YORK, NY 398,568398.6k $4.7m $4.7m 4.28% Added +23.7k +23,700
30 SG Americas Securities, LLC 0.00% of their portfolio NEW YORK, NY 397,523397.5k $4.7m $4.7m 0.00% New
31 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 371,488371.5k $4.4m $4.4m 0.00% Added +8.5k +8,489
32 Ancora Advisors LLC 0.08% of their portfolio Cleveland, OH 370,701370.7k $4.4m $4.4m 0.08% Reduced -350.4k -350,389
33 VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 360,698360.7k $4.2m $4.2m 0.00% Added +46.3k +46,289
34 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 304,607304.6k $3.6m $3.6m 0.00% Reduced -202.8k -202,840
35 Loews Corp 0.03% of their portfolio New York, NY 300,000300.0k $3.5m $3.5m 0.03% Unchanged
36 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 292,549292.5k $3.4m $3.4m 0.00% Reduced -12.4k -12,361
37 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 283,739283.7k $3.3m $3.3m 0.00% Added +29.2k +29,165
38 CastleKnight Management LP 0.12% of their portfolio New York, NY 282,095282.1k $3.3m $3.3m 0.12% Added +98.6k +98,600
39 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 225,355225.4k $2.6m $2.6m 0.00% Added +8.8k +8,774
40 GRATIA CAPITAL, LLC 3.04% of their portfolio LOS ANGELES, CA 224,872224.9k $2.6m $2.6m 3.04% Reduced -74.8k -74,755
41 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 217,272217.3k $2.6m $2.6m 0.00% Added +39.4k +39,394
42 Man Group plc 0.00% of their portfolio LONDON, X0 207,170207.2k $2.4m $2.4m 0.00% Added +21.7k +21,740
43 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.04% of their portfolio HOUSTON, TX 206,604206.6k $2.4m $2.4m 0.04% Added +7.7k +7,721
44 LSV ASSET MANAGEMENT 0.00% of their portfolio CHICAGO, IL 199,623199.6k $2.3m $2.3m 0.00% Reduced -44.9k -44,870
45 READYSTATE ASSET MANAGEMENT LP 0.09% of their portfolio CHICAGO, IL 192,534192.5k $2.3m $2.3m 0.09% Reduced -9.7k -9,679
46 PRIVATE MANAGEMENT GROUP INC 0.06% of their portfolio IRVINE, CA 186,728186.7k $2.2m $2.2m 0.06% New
47 NORGES BANK 0.00% of their portfolio OSLO, Q8 180,500180.5k $2.1m $2.1m 0.00% Not comparable
48 Trexquant Investment LP 0.01% of their portfolio STAMFORD, CT 175,176175.2k $2.1m $2.1m 0.01% Reduced -112.1k -112,128
49 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 164,888164.9k $1.9m $1.9m 0.00% Reduced -38.0k -38,000
50 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.00% of their portfolio TORONTO, A6 161,600161.6k $1.9m $1.9m 0.00% Added +115.0k +115,001
51 TUDOR INVESTMENT CORP ET AL 0.01% of their portfolio STAMFORD, CT 147,495147.5k $1.7m $1.7m 0.01% Reduced -121.8k -121,755
52 Empowered Funds, LLC 0.01% of their portfolio NEWTOWN SQUARE, PA 141,758141.8k $1.7m $1.7m 0.01% Added +7.7k +7,721
53 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 135,285135.3k $1.6m $1.6m 0.00% Reduced -179.5k -179,534
54 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 127,705127.7k $1.5m $1.5m 0.00% Added +6.7k +6,670
55 Vanguard Global Advisers, LLC 0.00% of their portfolio MALVERN, PA 110,369110.4k $1.3m $1.3m 0.00% Added +30.0k +30,023
56 XTX Topco Ltd 0.02% of their portfolio LONDON, X0 106,905106.9k $1.3m $1.3m 0.02% Added +3.9k +3,929
57 Alpine Global Management, LLC 0.19% of their portfolio NEW YORK, NY 100,000100.0k $1.2m $1.2m 0.19% Unchanged
58 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 99,71499.7k $1.2m $1.2m 0.00% Reduced -14.2k -14,163
59 Jump Financial, LLC 0.01% of their portfolio Chicago, IL 89,33889.3k $1.0m $1.0m 0.01% Reduced -83.9k -83,924
60 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 84,70384.7k $995.3k $995.3k 0.00% Added +5.7k +5,748
61 Balyasny Asset Management L.P. 0.00% of their portfolio Chicago, IL 81,31081.3k $955.4k $955.4k 0.00% New
62 Quinn Opportunity Partners LLC 0.04% of their portfolio CHARLOTTESVILLE, VA 75,62475.6k $888.6k $888.6k 0.04% Unchanged
63 FMR LLC 0.00% of their portfolio BOSTON, MA 74,25074.2k $872.4k $872.4k 0.00% Added +7.4k +7,443
64 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 72,30572.3k $849.6k $849.6k 0.00% Added +14.5k +14,517
65 Thrivent Financial for Lutherans 0.00% of their portfolio Minneapolis, MN 71,44971.4k $840.0k $840.0k 0.00% New
66 Susquehanna Portfolio Strategies, LLC 0.01% of their portfolio Bala Cynwyd, PA 70,90270.9k $833.1k $833.1k 0.01% Reduced -18.3k -18,309
67 KNIGHTSBRIDGE ASSET MANAGEMENT, LLC 0.06% of their portfolio NEWPORT BEACH, CA 62,76762.8k $863.9k $863.9k 0.06% Added +26.3k +26,287
68 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio COLUMBUS, OH 57,27557.3k $673.0k $673.0k 0.00% Added +4.6k +4,584
69 Nuveen, LLC 0.00% of their portfolio CHARLOTTE, NC 55,75955.8k $655.2k $655.2k 0.00% Reduced -35.0k -34,965
70 Quantbot Technologies LP 0.03% of their portfolio NEW YORK, NY 54,01754.0k $634.7k $634.7k 0.03% Added +41.5k +41,504
71 Voleon Capital Management LP 0.01% of their portfolio BERKELEY, CA 50,08750.1k $588.5k $588.5k 0.01% Reduced -5.3k -5,323
72 Engineers Gate Manager LP 0.01% of their portfolio NEW YORK, NY 49,24049.2k $578.6k $578.6k 0.01% Reduced -72.2k -72,187
73 RBF Capital, LLC 0.02% of their portfolio RENO, NV 45,49245.5k $534.5k $534.5k 0.02% Unchanged
74 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 41,18541.2k $483.9k $483.9k 0.00% Added +155 +155
75 Tactive Advisors, LLC 0.12% of their portfolio Jacksonville, FL 40,03540.0k $470.4k $470.4k 0.12% Added +5.1k +5,140
76 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 39,13439.1k $372.2k $372.2k 0.00% Added +3.6k +3,600
77 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 37,61037.6k $442.0k $442.0k 0.00% Added +1.6k +1,598
78 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 32,94432.9k $387.1k $387.1k 0.00% Added +21.6k +21,604
79 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 32,65632.7k $383.7k $383.7k 0.00% Added +7.6k +7,620
80 CANADA PENSION PLAN INVESTMENT BOARD 0.00% of their portfolio TORONTO ONTARIO, A6 31,60031.6k $371.3k $371.3k 0.00% Added +7.7k +7,700
81 Odyssean, LLC 0.06% of their portfolio DARIEN, CT 30,23630.2k $355.3k $355.3k 0.06% New
82 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 29,89529.9k $351.3k $351.3k 0.00% Added +15.7k +15,747
83 Dynamic Technology Lab Private Ltd 0.08% of their portfolio SINGAPORE, U0 28,94228.9k $340.0k $340.0k 0.08% New
84 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 26,18526.2k $307.7k $307.7k 0.00% Added +4.1k +4,081
85 Sterling Capital Management LLC 0.01% of their portfolio CHARLOTTE, NC 25,92025.9k $304.6k $304.6k 0.01% Reduced -395 -395
86 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 24,74124.7k $290.7k $290.7k 0.00% Added +1.3k +1,260
87 BROWN ADVISORY INC 0.00% of their portfolio BALTIMORE, MD 22,05422.1k $259.1k $259.1k 0.00% Unchanged
88 Creative Planning 0.00% of their portfolio OVERLAND PARK, KS 22,01222.0k $258.6k $258.6k 0.00% Added +7.4k +7,370
89 IEQ CAPITAL, LLC 0.00% of their portfolio Foster City, CA 21,63321.6k $254.2k $254.2k 0.00% New
90 Brevan Howard Capital Management LP 0.00% of their portfolio ST. HELIER, Y9 21,21621.2k $249.3k $249.3k 0.00% New
91 National Philanthropic Trust 0.00% of their portfolio Jenkintown, PA 20,84820.8k $245.0k $245.0k 0.00% Added +9.9k +9,930
92 PRELUDE CAPITAL MANAGEMENT, LLC 0.02% of their portfolio NEW YORK, NY 20,12420.1k $236.5k $236.5k 0.02% Added +825 +825
93 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 20,00920.0k $235.1k $235.1k 0.00% New
94 State of Wyoming 0.02% of their portfolio CHEYENNE, WY 19,84419.8k $233.2k $233.2k 0.02% Added +4.7k +4,668
95 ARISTEIA CAPITAL, L.L.C. 0.00% of their portfolio GREENWICH, CT 18,96619.0k $222.9k $222.9k 0.00% New
96 Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% of their portfolio FRANKFURT AM MAIN, 2M 18,56718.6k $218.2k $218.2k 0.00% Unchanged
97 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 17,90417.9k $210.4k $210.4k 0.00% Reduced -326 -326
98 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 16,52716.5k $190.1k $190.1k 0.00% Added +840 +840
99 GLENMEDE TRUST CO NA 0.00% of their portfolio PHILADELPHIA, PA 16,23016.2k $190.7k $190.7k 0.00% Unchanged
100 WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio PLYMOUTH, MN 15,75215.8k $203.2k $203.2k 0.00% New