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OLN · OLIN Corp · Holdings

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$15.90 -0.06 (-0.38%) At close · Oct 2
Market Cap
$1.87B
Shares
113.98M
Volume · Oct 2 3.92M Avg daily vol (3M) 3M

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.

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
The Sep 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. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 419
Total Value: $2,298,976,989
Total Shares: 116,214,478
Showing 1–100 of 434 holdings by value · page 1 of 5

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 418 13F filers
Top Holder
13.8%
Sep 2023 → Jun 2026 · range 11.0% – 14.1%
of institutional value
Top 5
38.9%
Sep 2023 → Jun 2026 · range 36.8% – 46.5%
of institutional value
Top 10
58.2%
Sep 2023 → Jun 2026 · range 55.1% – 63.8%
of institutional value
HHI
479
Sep 2023 → Jun 2026 · range 434 – 574
Broadly held
Showing 100 of 434
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 74303 CUSIP 680665205 13F (30d) 11 filings 11 filers Visit website Investor relations