Magnera Corp.
Magnera Corp. (MAGN) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · MAGN · as of Mar 31, 2025
Ownership Breakdown
215
Institutional Holders
▼ 18 vs Q4
$639.49M
Total Inst. Value
▲ $3.93M vs Q4
35.60M
Shares Outstanding
freeFloat 99.43%
35.21M
13F Shares Held
▲ 233,110 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
MAGN largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
MADISON AVENUE PARTNERS, LP paper mills | 3.34M | 9.39% | 9.39% | $60.73B | May 15, 2025 | ▼ 62.3K |
VANGUARD GROUP INC paper mills | 2.90M | 8.14% | 8.14% | $52.60B | May 9, 2025 | ▲ 12.2K |
ENGINE CAPITAL MANAGEMENT, LP paper mills | 2.36M | 6.62% | 6.62% | $42.81B | May 15, 2025 | ▼ 1.1K |
LITTLEJOHN & CO LLC paper mills | 1.95M | 5.47% | 5.47% | $35.38B | May 13, 2025 | ▲ 539.7K |
ANCORA ADVISORS, LLC paper mills | 1.68M | 4.71% | 4.71% | $30.43B | May 15, 2025 | ▲ 21.9K |
FULLER & THALER ASSET MANAGEMENT, INC. paper mills | 1.32M | 3.70% | 3.70% | $23.92B | May 13, 2025 | ▲ 15.0K |
NEWTYN MANAGEMENT, LLC paper mills | 1.30M | 3.65% | 3.65% | $23.61B | May 15, 2025 | ▲ 400.0K |
IRENIC CAPITAL MANAGEMENT LP paper mills | 1.21M | 3.40% | 3.40% | $21.99B | May 15, 2025 | ▲ 315.1K |
MILLENNIUM MANAGEMENT LLC paper mills | 1.18M | 3.33% | 3.33% | $21.50B | May 15, 2025 | ▲ 287.0K |
BLACKROCK, INC. paper mills | 923.6K | 2.59% | 2.59% | $16.77B | May 2, 2025 | ▲ 21.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
28
Increased
+4.11M shares1
New Positions
first time holders18
Decreased
−2.62M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.49M
+4.11M / −2.62M
Net new holders
+11
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
MAGN insider trading · insider activity
Source: SEC Form 4
10
Buy transactions
4
Sell transactions
2.50
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
RICKERTSEN CARL J director | Mar 9, 2026 | Award | 12,998 | — | — | 13.0K | Form 4 ↗ |
Salmon Tom director | Mar 9, 2026 | Award | 12,998 | — | — | 13.0K | Form 4 ↗ |
Marnick Samantha J. director | Mar 9, 2026 | Award | 12,998 | — | — | 13.0K | Form 4 ↗ |
Hall Mary Dean director | Mar 9, 2026 | Award | 12,998 | — | — | 13.0K | Form 4 ↗ |
Curless Michael S director | Mar 9, 2026 | Award | 12,998 | — | — | 13.0K | Form 4 ↗ |
Fogarty Kevin Michael director | Mar 9, 2026 | Award | 12,998 | — | — | 13.0K | Form 4 ↗ |
Fahnemann Thomas director | Mar 9, 2026 | Award | 12,998 | — | — | 13.0K | Form 4 ↗ |
Brown Bruce director | Mar 9, 2026 | Award | 12,998 | — | — | 13.0K | Form 4 ↗ |
Urey Jill L. EVP, GC & Corp Sec | Feb 28, 2026 | Tax Withhold | 521 | $12.95 | $6.7K | 5.1K | Form 4 ↗ |
Urey Jill L. EVP, GC & Corp Sec | Feb 24, 2026 | Tax Withhold | 68 | $13.03 | $886.04 | 4.1K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Magnera Corp. (MAGN) is primarily owned by institutional investors, who hold approximately 98.9% of total shares outstanding. Company insiders own approximately 0.57%, while retail and public investors account for the remaining 0.52%.
The largest institutional shareholder of Magnera Corp. is MADISON AVENUE PARTNERS, LP, holding approximately 3.34 million shares — equal to 9.39% of outstanding shares — as of March 31, 2025.
A total of 215 institutional investors currently hold MAGN stock, with a combined institutional value of approximately $639,485,251 as of the most recent 13F filing period.
Frequently asked questions
MAGN ownershipMagnera Corp. (MAGN) is primarily owned by institutional investors, who hold approximately 98.9% of shares. The largest shareholder is MADISON AVENUE PARTNERS, LP with a 9.39% stake. Company insiders hold 0.57%. Data sourced from SEC Form 13F as of March 31, 2025.