Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MAGN held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Newtyn Management, LLC | 2.8M | $26.2M | +17.0% | 7.753% | 2.80% |
| 2 | LITTLEJOHN & CO LLC | 2.4M | $23.1M | -6.5% | 6.814% | 21.86% |
| 3 | BlackRock, Inc. | 2.4M | $22.7M | +0.6% | 6.713% | 0.00% |
| 4 | Engine Capital Management, LP | 2.2M | $21.3M | 0.0% | 6.303% | 2.58% |
| 5 | MORGAN STANLEY | 2.0M | $18.7M | -18.8% | 5.528% | 0.00% |
| 6 | Madison Avenue Partners, LP | 1.6M | $15.1M | -10.7% | 4.468% | 0.66% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | $14.6M | β | 4.307% | 0.00% |
| 8 | DG Capital Management, LLC | 1.2M | $11.5M | +3183.1% | 3.391% | 3.64% |
| 9 | Diameter Capital Partners LP | 1.2M | $11.5M | 0.0% | 3.387% | 3.27% |
| 10 | D. E. Shaw & Co., Inc. | 896K | $8.5M | +11.2% | 2.518% | 0.01% |
| 11 | CANYON CAPITAL ADVISORS LLC | 810K | $7.7M | 0.0% | 2.275% | 1.00% |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 780K | $7.4M | +4.6% | 2.192% | 0.00% |
| 13 | Assenagon Asset Management S.A. | 742K | $7.1M | 0.0% | 2.085% | 0.01% |
| 14 | Clearline Capital LP | 738K | $7.0M | +11.8% | 2.074% | 0.55% |
| 15 | STATE STREET CORP | 657K | $6.2M | +2.5% | 1.845% | 0.00% |
| 16 | JB CAPITAL PARTNERS LP | 655K | $6.2M | +27.2% | 1.840% | 1.07% |
| 17 | JACOBS LEVY EQUITY MANAGEMENT, INC | 525K | $5.0M | -33.2% | 1.474% | 0.02% |
| 18 | AMERIPRISE FINANCIAL INC | 509K | $4.8M | -2.2% | 1.428% | 0.00% |
| 19 | Russell Investments Group, Ltd. | 507K | $4.8M | +37.8% | 1.425% | 0.01% |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 454K | $4.3M | +12.8% | 1.274% | 0.00% |
| 21 | Verition Fund Management LLC | 432K | $4.1M | +31.0% | 1.214% | 0.03% |
| 22 | J. Goldman & Co LP | 387K | $3.7M | -28.0% | 1.088% | 0.12% |
| 23 | Seven Six Capital Management, LLC | 375K | $3.6M | +33.2% | 1.053% | 3.83% |
| 24 | GOLDMAN SACHS GROUP INC | 363K | $3.5M | -54.0% | 1.020% | 0.00% |
| 25 | CITADEL ADVISORS LLC | 315K | $3.0M | -46.5% | 0.884% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in MAGN β a direct measure of their conviction.
Filings activity in MAGN during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new MAGN position in Q1 2026
Institutions that fully closed their MAGN position in Q1 2026
7 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 173 | 7.5% | 71.67% | 48.58 pp | $322M | 40% |
| Q4 2025 | 187 | +7.5% | 120.25% | +29.91 pp | $541M | +33% |
| Q3 2025 | 174 | 7.0% | 90.34% | 11.28 pp | $406M | 11% |
| Q2 2025 | 187 | 12% | 101.62% | 27.68 pp | $457M | 21% |
| Q1 2025 | 212 | 4.5% | 129.30% | +1.91 pp | $581M | +1.5% |
| Q4 2024 | 222 | +5450% | 127.39% | +127.23 pp | $573M | +78836% |
| Q3 2024 | 4 | β | 0.16% | β | $1M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MAGN stock.
Based on Q1 2026 13F filings, institutional ownership of Magnera Corp. stands at 71.7%, held across 173 reporting institutions.
Newtyn Management, LLC is the largest reported institutional holder of MAGN, with approximately 2,760,000 shares worth $0.03B as of Q1 2026.
Yes β 1 widely-followed marquee investor appear among the top 25 institutional holders of MAGN, including CITADEL ADVISORS LLC.
Our composite Smart Money Score for MAGN is 32 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
27 institutions opened new positions in MAGN during Q1 2026, while 41 fully exited. 28 added to existing positions and 113 trimmed.
MAGN institutional ownership fell by 48.58 percentage points quarter-over-quarter, with a net change of -14 holders.
The top 10 institutions account for 53.8% of all reported 13F value in MAGN, and the top 25 account for 78.1%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Magnera Corp. (MAGN) Institutional Ownership