As of November 6, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Magnera Corp. The largest reported stake is Newtyn Management, LLC's, at 7.7%. 17 filings are on record since July 17, 2025 (Schedule 13G/A, May 15, 2026).
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Key facts
- · Reporting person: Morgan Stanley · Sole voting: 0 · Shared voting: 1,388,482 · Sole dispositive: 0 · Shared dispositive: 1,391,243 · SCHEDULE 13G/A, 2026-08-12
- · Reporting person: Cetus Capital VI, L.P. · Sole voting: 1,561,199 · Shared voting: 0 · Sole dispositive: 1,561,199 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-05
- · Reporting person: Newtyn Management, LLC · Sole voting: 2,760,000 · Shared voting: 0 · Sole dispositive: 2,760,000 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-05-15
- · Reporting person: Madison Avenue International LP · Sole voting: 0 · Shared voting: 1,590,616 · Sole dispositive: 0 · Shared dispositive: 1,590,616 · SCHEDULE 13G/A, 2026-05-15
- · Holder: Morgan Stanley · Percent: 5.3% · SCHEDULE 13G/A
Magnera Corp has 17 Schedule 13D or 13G filings on record since 2025-07-17. 2 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Newtyn Management, LLC | 7.7% | 2,760,000 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| BlackRock, Inc. | 7.1% | 2,519,401 | SCHEDULE 13G, 2025-07-17 | 2025-06-30 |
| Madison Avenue International LP | 4.4% | 1,590,616 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Cetus Capital VI, L.P. | 4.36% | 1,561,199 | SCHEDULE 13G/A, 2026-08-05 | 2026-07-28 |
| 3.9% | 1,391,243 | SCHEDULE 13G/A, 2026-08-12 | 2026-06-30 | |
| Ancora Advisors LLC | 1.5% | 533,161 | SCHEDULE 13G, 2026-02-13 | 2025-12-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
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More on Magnera Corp and the records around it.
Magnera Corp elsewhere on the record
Companies that share a holder
- Cetus Capital VI, L.P. also filed stake reports on 1 other company: Forward Air Corporation (May 2026)
- Madison Avenue International LP also filed stake reports on 11 other companies: Ultragenyx Pharmaceutical Inc. (Oct 2026), Graham Holdings Co (Aug 2026), STAAR SURGICAL CO (Aug 2026)
- Newtyn Management, LLC also filed stake reports on 13 other companies: Par Technology Corporation (Aug 2026), QuidelOrtho Corporation (Aug 2026), Theravance Biopharma, Inc. (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Newtyn Management, LLC | 2,760,000 | 0 | 2,760,000 | 0 | SCHEDULE 13G/A, 2026-05-15 |
| Madison Avenue International LP | 0 | 1,590,616 | 0 | 1,590,616 | SCHEDULE 13G/A, 2026-05-15 |
| Madison Avenue Partners, LP | 0 | 1,590,616 | 0 | 1,590,616 | SCHEDULE 13G/A, 2026-05-15 |
| EMAI Management, LLC | 0 | 1,590,616 | 0 | 1,590,616 | SCHEDULE 13G/A, 2026-05-15 |
| Madison Avenue GP, LLC | 0 | 1,590,616 | 0 | 1,590,616 | SCHEDULE 13G/A, 2026-05-15 |
| Caraway Jackson Investments LLC | 0 | 1,590,616 | 0 | 1,590,616 | SCHEDULE 13G/A, 2026-05-15 |
| Eli Samaha | 0 | 1,590,616 | 0 | 1,590,616 | SCHEDULE 13G/A, 2026-05-15 |
| Cetus Capital VI, L.P. | 1,561,199 | 0 | 1,561,199 | 0 | SCHEDULE 13G/A, 2026-08-05 |
| Morgan Stanley | 0 | 1,388,482 | 0 | 1,391,243 | SCHEDULE 13G/A, 2026-08-12 |
| Morgan Stanley Capital Services LLC | 0 | 1,369,957 | 0 | 1,369,957 | SCHEDULE 13G/A, 2026-08-12 |
The latest filing identifies Magnera Corp by CUSIP 55939A107 and gives its principal executive office as 9335 HARRIS CORNERS PKWY, SUITE 300, CHARLOTTE, NC 28269 (SCHEDULE 13G/A, 2026-08-12).
What the percentages are based on
The following percentage is based on 35,900,000 shares of Common Stock outstanding as of February 5, 2026, as disclosed in the Issuer's Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on February 5, 2026. As of March 31, 2026, the Reporting Persons may be deemed to have beneficially owned approximately 4.4% of the outstanding shares of Common Stock.Madison Avenue International LP, SCHEDULE 13G/A, 2026-05-15
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-17 | BlackRock, Inc. | 7.1% | SCHEDULE 13G |
| 2025-07-29 | The Vanguard Group | 6.65% | SCHEDULE 13G/A |
| 2025-08-06 | Morgan Stanley | 5.4% | SCHEDULE 13G |
| 2025-08-08 | Cetus Capital VI, L.P. | 7.88% | SCHEDULE 13G/A |
| 2025-08-14 | Newtyn Management, LLC | 6.4% | SCHEDULE 13G |
| 2025-11-07 | Morgan Stanley | 4.4% | SCHEDULE 13G/A |
| 2025-11-14 | Madison Avenue Partners, LP | 8% | SCHEDULE 13G/A |
| 2026-02-12 | Morgan Stanley | 6.5% | SCHEDULE 13G |
| 2026-02-13 | Ancora Advisors LLC | 1.5% | SCHEDULE 13G |
| 2026-02-17 | Madison Avenue International LP | 5% | SCHEDULE 13G/A |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-05-12 | Morgan Stanley | 5.3% | SCHEDULE 13G/A |
| 2026-05-12 | Cetus Capital VI, L.P. | 6.26% | SCHEDULE 13G/A |
| 2026-05-15 | Madison Avenue International LP | 4.4% | SCHEDULE 13G/A |
| 2026-05-15 | Newtyn Management, LLC | 7.7% | SCHEDULE 13G/A |
| 2026-08-05 | Cetus Capital VI, L.P. | 4.36% | SCHEDULE 13G/A |
| 2026-08-12 | Morgan Stanley | 3.9% | SCHEDULE 13G/A |
Questions about who owns Magnera Corp
Who owns Magnera Corp?
On this page, 2 holders' latest ownership filings report 5% or more of Magnera Corp: Newtyn Management, LLC (7.7%, Schedule 13G/A, filed 2026-05-15) and BlackRock, Inc. (7.1%, Schedule 13G, filed 2025-07-17).
Who are the largest shareholders of Magnera Corp?
By the share each holder's latest filing reports, the largest holders of Magnera Corp on this page are Newtyn Management, LLC (7.7%) and BlackRock, Inc. (7.1%).
When did Newtyn Management, LLC buy into Magnera Corp?
The filings give report dates, not purchase dates. The earliest filing from Newtyn Management, LLC on this page is the Schedule 13G, filed 2025-08-14, reporting 6.4%; its latest, Schedule 13G/A filed 2026-05-15, reports 7.7%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 17 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.