Who owns Magnera Corp?
Institutional ownership of MAGN from SEC Form 13F filings across 136 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
136
13F holders
$301.9M
value, 2026 filers
73.6%
of shares outstanding (26.2M sh)
25
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of MAGN's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 2.6M | $30.5M | 0.0% | 7.3% | +8.6% |
| 2 | Diameter Capital Partners LP | 2.4M | $28.3M | 2.3% | 6.8% | +100.0% |
| 3 | Engine Capital Management, LP | 2.2M | $26.4M | 2.6% | 6.3% | 0.0% |
| 4 | LITTLEJOHN & CO LLC | 1.9M | $22.2M | 28.2% | 5.3% | -22.1% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 1.6M | $18.4M | 0.0% | 4.4% | -49.0% |
| 6 | MORGAN STANLEY | 1.5M | $18.0M | 0.0% | 4.3% | -22.0% |
| 7 | Verition Fund Management LLC | 1.2M | $14.3M | 0.1% | 3.4% | +181.0% |
| 8 | DG Capital Management, LLC | 1.1M | $12.9M | 2.7% | 3.1% | -8.8% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 862,384 | $10.1M | 0.0% | 2.4% | +10.5% |
| 10 | D. E. Shaw & Co., Inc. | 789,745 | $9.3M | 0.0% | 2.2% | -11.9% |
| 11 | JPMORGAN CHASE & CO | 610,865 | $7.2M | 0.0% | 1.7% | -26.3% |
| 12 | AMERICAN CENTURY COMPANIES INC | 599,991 | $7.0M | 0.0% | 1.7% | +171.3% |
| 13 | AMERIPRISE FINANCIAL INC | 578,498 | $6.8M | 0.0% | 1.6% | +13.8% |
| 14 | Assenagon Asset Management S.A. | 558,957 | $6.6M | 0.0% | 1.6% | -24.7% |
| 15 | UBS Group AG | 506,934 | $6.0M | 0.0% | 1.4% | +72.3% |
| 16 | J. Goldman & Co LP | 424,989 | $5.0M | 0.1% | 1.2% | +9.7% |
| 17 | Sixth Street Partners Management Company, L.P.NEW | 423,311 | $5.0M | 0.9% | 1.2% | new |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 423,311 | $5.0M | 0.0% | 1.2% | -6.7% |
| 19 | SG Americas Securities, LLCNEW | 397,523 | $4,671 | 0.0% | 1.1% | new |
| 20 | GOLDMAN SACHS GROUP INC | 371,488 | $4.4M | 0.0% | 1% | +2.3% |
| 21 | Ancora Advisors LLCNEW | 370,701 | $4.4M | 0.1% | 1% | new |
| 22 | VANGUARD PORTFOLIO MANAGEMENT LLC | 360,698 | $4.2M | 0.0% | 1% | +14.7% |
| 23 | Russell Investments Group, Ltd. | 304,607 | $3.6M | 0.0% | 0.9% | -40.0% |
| 24 | BNP PARIBAS FINANCIAL MARKETS | 292,549 | $3.4M | 0.0% | 0.8% | -4.1% |
| 25 | NORTHERN TRUST CORP | 283,739 | $3.3M | 0.0% | 0.8% | +11.5% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.