Olin Corporation
Olin Corporation (OLN) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · OLN · as of Mar 31, 2025
Ownership Breakdown
376
Institutional Holders
▼ 30 vs Q4
$2.45B
Total Inst. Value
▼ $1.06B vs Q4
113.90M
Shares Outstanding
freeFloat 99.37%
100.98M
13F Shares Held
▼ 3.01M 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
OLN largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC chemicals & allied products | 12.19M | 10.57% | 10.57% | $295.51B | May 14, 2025 | ▲ 1.26M |
BLACKROCK, INC. chemicals & allied products | 12.14M | 10.53% | 10.53% | $294.32B | May 2, 2025 | ▲ 497.9K |
VANGUARD GROUP INC chemicals & allied products | 11.75M | 10.19% | 10.19% | $284.79B | May 9, 2025 | ▲ 245.6K |
FULLER & THALER ASSET MANAGEMENT, INC. chemicals & allied products | 6.38M | 5.54% | 5.54% | $154.77B | May 13, 2025 | ▲ 1.84M |
STATE STREET CORP chemicals & allied products | 4.78M | 4.15% | 4.15% | $115.87B | May 15, 2025 | ▼ 32.0K |
DIMENSIONAL FUND ADVISORS LP chemicals & allied products | 4.55M | 3.94% | 3.94% | $110.20B | May 13, 2025 | ▲ 569.5K |
YACKTMAN ASSET MANAGEMENT LP chemicals & allied products | 4.02M | 3.49% | 3.49% | $97.45B | Apr 30, 2025 | ▲ 122.2K |
PZENA INVESTMENT MANAGEMENT LLC chemicals & allied products | 3.66M | 3.18% | 3.18% | $88.78B | May 2, 2025 | ▼ 47.1K |
FMR LLC chemicals & allied products | 3.15M | 2.73% | 2.73% | $76.29B | May 12, 2025 | ▼ 226.0K |
MILLENNIUM MANAGEMENT LLC chemicals & allied products | 2.14M | 1.86% | 1.86% | $51.97B | May 15, 2025 | ▼ 1.06M |
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
35
Increased
+10.90M shares3
New Positions
first time holders12
Decreased
−4.13M shares0
Sold Out
fully exitedNet shares change (top 50)
+6.78M
+10.90M / −4.13M
Net new holders
+26
3 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
OLN insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
1
Sell transactions
0.00
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 |
|---|---|---|---|---|---|---|---|
Kohl Florian J VP & Pres,Epoxy&International | Jun 1, 2026 | Tax Withhold | 492 | $25.67 | $12.6K | 7.9K | Form 4 ↗ |
Kohl Florian J VP & Pres,Epoxy&International | May 15, 2026 | Tax Withhold | 819 | $27.07 | $22.2K | 7.2K | Form 4 ↗ |
PIGGOTT JULIE A director | May 1, 2026 | Award | 7,023 | — | — | 21.5K | Form 4 ↗ |
Daly Edward director | May 1, 2026 | Award | 7,023 | — | — | 16.7K | Form 4 ↗ |
Shipp Earl L director | May 1, 2026 | Award | 7,023 | — | — | 59.2K | Form 4 ↗ |
Williams Carol A director | May 1, 2026 | Award | 7,023 | — | — | 58.9K | Form 4 ↗ |
Darnall Matthew S director | May 1, 2026 | Award | 10,535 | — | — | 42.7K | Form 4 ↗ |
Babcock Beverley A director | May 1, 2026 | Award | 4,916 | — | — | 38.5K | Form 4 ↗ |
Babcock Beverley A director | May 1, 2026 | Award | 2,107 | $28.48 | $60.0K | 5.6K | Form 4 ↗ |
Weideman William H director | May 1, 2026 | Award | 7,023 | — | — | 53.7K | 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
Olin Corporation (OLN) is primarily owned by institutional investors, who hold approximately 88.7% of total shares outstanding. Company insiders own approximately 0.63%, while retail and public investors account for the remaining 10.71%.
The largest institutional shareholder of Olin Corporation is HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC, holding approximately 12.19 million shares — equal to 10.57% of outstanding shares — as of March 31, 2025.
A total of 376 institutional investors currently hold OLN stock, with a combined institutional value of approximately $2.45 billion as of the most recent 13F filing period.
Frequently asked questions
OLN ownershipOlin Corporation (OLN) is primarily owned by institutional investors, who hold approximately 88.7% of shares. The largest shareholder is HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC with a 10.57% stake. Company insiders hold 0.63%. Data sourced from SEC Form 13F as of March 31, 2025.