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OLN · OLIN Corp

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$18.71 +0.23 (+1.24%) At close · Aug 19
Market Cap
$2.17B
Shares
113.98M

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.

Holders: 412
Total Value: $2,299,136,346
Total Shares: 116,001,018

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 412 13F filers · Δ vs Mar 31, 2026
Top Holder
13.8%
Sep 2023 → Jun 2026 · range 11.0% – 14.1%
+0.8 pts
Top 5
38.9%
Sep 2023 → Jun 2026 · range 36.9% – 46.5%
+2.0 pts
Top 10
58.2%
Sep 2023 → Jun 2026 · range 55.2% – 63.8%
+3.0 pts
HHI
479
Sep 2023 → Jun 2026 · range 435 – 574
Broadly held+44

Quarterly Activity

vs Mar 31, 2026
New
69
Increased
142
Decreased
127
Sold Out
85
Unchanged
74
Holder count: -16
Institutional value: -33.2%
Shares held: -0.0%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 427
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 74303 CUSIP 680665205 13F (30d) 363 filings 359 filers Visit website Investor relations