OLN Institutional Ownership
Who owns OLIN Corp and what the big funds did with it last quarter, from every SEC 13F filing. 413 funds reported holding OLN at Jun 30, 2026, together owning 99.8% of the company.
- ●203 buying vs 197 selling
- ▲Held by funds +1.0 pts
- ▼Funds holding -11
- ▲Superinvestors: 3 added, 2 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 413 | 424 | −2.6% |
| In funds' top 10 | 3 | 5 | −40.0% |
| 13F shares | 114M | 113M | +1.0% |
| Held by funds | 99.8% | 98.8% | +1.0 pts |
| New positions | 62 | 99 | −37.4% |
| Increased | 141 | 149 | −5.4% |
| Reduced | 123 | 86 | +43.0% |
| Sold out | 74 | 59 | +25.4% |
| Calls (shares) | 272K | 200K | +36.3% |
| Puts (shares) | 367K | 522K | −29.8% |
| Put/call ratio | 0.54 | 1.44 | −62.8% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in OLN
All superinvestors →
Who owns OLN
share of fund held shares- Index and passive funds35.6%
- Active managers and hedge funds52.4%
- Banks and brokers10.5%
- Pensions, insurers and other1.5%
The top 10 holders own 59.3% of all OLN shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
108 funds changed their position- CenterBook Partners LPTrimmed−395K sh
- Royal Palms Capital LLCSold out−157K sh
- Hatch Cove Capital, LLCSold out−136K sh
- Oak Thistle LLCSold out−121K sh
- State of Alaska, Department of RevenueTrimmed−104K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Hotchkis & Wiley Capital Management LLC | 14.05% | 16M | $318M | +937K |
| 2 | BlackRock, Inc. | 10.51% | 12M | $238M | +497K |
| 3 | Dimensional Fund Advisors LP | 5.41% | 6.2M | $122M | +538K |
| 4 | AQR Capital Management LLC | 4.83% | 5.5M | $109M | +4.3M |
| 5 | Vanguard Portfolio Management LLC | 4.78% | 5.4M | $108M | +8,071 |
| 6 | Vanguard Capital Management LLC | 4.51% | 5.1M | $102M | +100K |
| 7 | State Street Corp | 4.21% | 4.8M | $95.1M | −230 |
| 8 | Fuller & Thaler Asset Management, Inc. | 3.77% | 4.3M | $85.3M | −714K |
| 9 | Yacktman Asset Management LP | 3.69% | 4.2M | $83.4M | +117K |
| 10 | Pzena Investment Management LLC | 3.41% | 3.9M | $77.1M | −541K |
- AQR Capital Management LLC+4.3M sh+$86.1M
- Captrust Financial Advisors+1.3M sh+$25.8M
- Hotchkis & Wiley Capital Management LLC+937K sh+$18.6M
- Jpmorgan Chase & Co+726K sh+$15.2M
- Citadel Advisors LLC+593K sh+$11.8M
- Dimensional Fund Advisors LP+538K sh+$10.7M
- Allianz Asset Management GmbH+502K sh+$9.9M
- BlackRock, Inc.+497K sh+$9.9M
- Amundi−684K sh−$20.3M
- Millennium Management LLC−984K sh−$19.5M
- Wolf Hill Capital Management, LP−634K sh−$18.8M
- Merewether Investment Management, LP−623K sh−$18.5M
- Fuller & Thaler Asset Management, Inc.−714K sh−$14.2M
- Two Sigma Investments, LP−704K sh−$14M
- Tudor Investment Corp ET AL−632K sh−$12.5M
- D. E. Shaw & Co., Inc.−562K sh−$11.1M
OLN institutional ownership FAQ
Who owns the most OLN stock?
In Q2 2026 13F filings the largest holder of OLN was Hotchkis & Wiley Capital Management LLC, followed by BlackRock, Inc. and Dimensional Fund Advisors LP. Index fund managers are usually the biggest holders of large companies.
What percentage of OLN is owned by institutions?
Funds that file 13F reports held 99.8% of OLN's shares at Jun 30, 2026, compared with 98.8% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying OLN?
In Q2 2026, 203 funds bought OLN (62 of them new positions) and 197 sold (74 sold out completely). Among well known investors, 3 added and 2 cut. Our fund sentiment for OLN is neutral.
What is OLN's institutional put/call ratio?
Funds reported $2.9M of OLN puts against $5.4M of calls, a put/call ratio of 0.54 (1.44 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this OLN ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.