MAGN MAGNERA CORP
MAGNERA CORP (MAGN) Institutional Ownership
What the institutions did with MAGN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Newtyn Management, LLC | 2.8M | 7.6% |
| BlackRock, Inc. | 2.6M | 7.0% |
| Engine Capital Management, LP | 2.2M | 6.1% |
| LITTLEJOHN & CO LLC | 1.9M | 5.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.6M | 4.2% |
| MORGAN STANLEY | 1.5M | 4.2% |
| Madison Avenue Partners, LP | 1.3M | 3.5% |
| Diameter Capital Partners LP | 1.2M | 3.3% |
| Assenagon Asset Management S.A. | 1.1M | 3.0% |
| DG Capital Management, LLC | 1.1M | 3.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 862.4K | 2.3% |
| CANYON CAPITAL ADVISORS LLC | 810.0K | 2.2% |
| D. E. Shaw & Co., Inc. | 789.7K | 2.1% |
| Clearline Capital LP | 741.1K | 2.0% |
| STATE STREET CORP | 671.9K | 1.8% |
| JB CAPITAL PARTNERS LP | 655.0K | 1.8% |
| THOMPSON SIEGEL & WALMSLEY LLC | 649.8K | 1.8% |
| JPMORGAN CHASE & CO | 610.9K | 1.7% |
| Verition Fund Management LLC | 607.3K | 1.6% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 601.6K | 1.6% |
| AMERICAN CENTURY COMPANIES INC | 600.0K | 1.6% |
| AMERIPRISE FINANCIAL INC | 578.5K | 1.6% |
| DIMENSIONAL FUND ADVISORS LP | 571.3K | 1.5% |
| UBS Group AG | 506.9K | 1.4% |
| AQR CAPITAL MANAGEMENT LLC | 479.5K | 1.3% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| LITTLEJOHN & CO LLC | Reduced | 2.4M | 1.9M | -536.7K |
| MORGAN STANLEY | Reduced | 2.0M | 1.5M | -433.6K |
| SG Americas Securities, LLC | New | 0 | 397.5K | +397.5K |
| AMERICAN CENTURY COMPANIES INC | Increased | 221.1K | 600.0K | +378.9K |
| Assenagon Asset Management S.A. | Increased | 742.4K | 1.1M | +375.5K |
| Ancora Advisors LLC | Reduced | 721.1K | 370.7K | -350.4K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 145.6K | 479.5K | +334.0K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 253.9K | 571.3K | +317.4K |
| Madison Avenue Partners, LP | Reduced | 1.6M | 1.3M | -288.6K |
| JPMORGAN CHASE & CO | Reduced | 828.8K | 610.9K | -217.9K |
| UBS Group AG | Increased | 294.1K | 506.9K | +212.8K |
| BlackRock, Inc. | Increased | 2.4M | 2.6M | +206.6K |
| Russell Investments Group, Ltd. | Reduced | 507.4K | 304.6K | -202.8K |
| MILLENNIUM MANAGEMENT LLC | Sold Out | 200.0K | 0 | -200.0K |
| PRIVATE MANAGEMENT GROUP INC | New | 0 | 186.7K | +186.7K |
| CITADEL ADVISORS LLC | Reduced | 314.8K | 135.3K | -179.5K |
| Verition Fund Management LLC | Increased | 432.3K | 607.3K | +175.0K |
| TUDOR INVESTMENT CORP ET AL | Reduced | 269.3K | 147.5K | -121.8K |
| Weiss Asset Management LP | Sold Out | 117.5K | 0 | -117.5K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Increased | 46.6K | 161.6K | +115.0K |
| Trexquant Investment LP | Reduced | 287.3K | 175.2K | -112.1K |
| ING GROEP NV | Sold Out | 110.0K | 0 | -110.0K |
| D. E. Shaw & Co., Inc. | Reduced | 896.2K | 789.7K | -106.5K |
| DG Capital Management, LLC | Reduced | 1.2M | 1.1M | -105.9K |
| CastleKnight Management LP | Increased | 183.5K | 282.1K | +98.6K |
| Jump Financial, LLC | Reduced | 173.3K | 89.3K | -83.9K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 780.3K | 862.4K | +82.1K |
| Balyasny Asset Management L.P. | New | 0 | 81.3K | +81.3K |
| Y-Intercept (Hong Kong) Ltd | Sold Out | 78.6K | 0 | -78.6K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Increased | 524.9K | 601.6K | +76.7K |
| THOMPSON SIEGEL & WALMSLEY LLC | Increased | 574.3K | 649.8K | +75.5K |
| GRATIA CAPITAL, LLC | Reduced | 299.6K | 224.9K | -74.8K |
| Engineers Gate Manager LP | Reduced | 121.4K | 49.2K | -72.2K |
| GSA CAPITAL PARTNERS LLP | Sold Out | 72.2K | 0 | -72.2K |
| Thrivent Financial for Lutherans | New | 0 | 71.4K | +71.4K |
| AMERIPRISE FINANCIAL INC | Increased | 508.5K | 578.5K | +70.0K |
| ExodusPoint Capital Management, LP | Sold Out | 57.7K | 0 | -57.7K |
| MARSHALL WACE, LLP | Sold Out | 55.2K | 0 | -55.2K |
| ALGERT GLOBAL LLC | Increased | 393.6K | 447.4K | +53.8K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 314.4K | 360.7K | +46.3K |
| LSV ASSET MANAGEMENT | Reduced | 244.5K | 199.6K | -44.9K |
| Quantbot Technologies LP | Increased | 12.5K | 54.0K | +41.5K |
| Newtyn Management, LLC | Increased | 2.8M | 2.8M | +40.0K |
| Squarepoint Ops LLC | Increased | 177.9K | 217.3K | +39.4K |
| STATE OF WISCONSIN INVESTMENT BOARD | Reduced | 202.9K | 164.9K | -38.0K |
| J. Goldman & Co LP | Increased | 387.3K | 425.0K | +37.7K |
| Nuveen, LLC | Reduced | 90.7K | 55.8K | -35.0K |
| Walleye Capital LLC | Sold Out | 30.6K | 0 | -30.6K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Reduced | 453.7K | 423.3K | -30.4K |
| Odyssean, LLC | New | 0 | 30.2K | +30.2K |
| Vanguard Global Advisers, LLC | Increased | 80.3K | 110.4K | +30.0K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 1.5M | 1.6M | +29.8K |
| NORTHERN TRUST CORP | Increased | 254.6K | 283.7K | +29.2K |
| Dynamic Technology Lab Private Ltd | New | 0 | 28.9K | +28.9K |
| FOX RUN MANAGEMENT, L.L.C. | Sold Out | 28.2K | 0 | -28.2K |
| KNIGHTSBRIDGE ASSET MANAGEMENT, LLC | Increased | 36.5K | 62.8K | +26.3K |
| Seven Six Capital Management, LLC | Increased | 374.9K | 398.6K | +23.7K |
| Man Group plc | Increased | 185.4K | 207.2K | +21.7K |
| IEQ CAPITAL, LLC | New | 0 | 21.6K | +21.6K |
| DEUTSCHE BANK AG\ | Increased | 11.3K | 32.9K | +21.6K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.