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Magnera Corp
$12.58 +0.64 (+5.36%) At close · Jul 2
Market Cap
$450.36M
Shares
35,800,000

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 177
Total Value: $346,334,997
Total Shares: 36,417,991
Showing 1–100 of 179 holdings by value · page 1 of 2

Institutional Ownership Trend

8 quarters

Holder Concentration

Across 177 13F filers
Top Holder
7.6%
Sep 2024 → Mar 2026 · range 6.9% – 73.1%
of institutional value
Top 5
32.4%
Sep 2024 → Mar 2026 · range 31.8% – 100.0%
of institutional value
Top 10
50.0%
Sep 2024 → Mar 2026 · range 48.7% – 100.0%
of institutional value
HHI
337
Sep 2024 → Mar 2026 · range 337 – 5,766
Broadly held
Showing 100 of 179
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 41719 CUSIP 55939A107 13F (30d) 1 filings 1 filers Visit website Investor relations