Who owns Olin (OLN)
Which tracked institutional funds hold OLN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OLN company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on OLN is one-sided between 2026-Q1 and 2026-Q2: 48 added or opened and 171 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
OLN’s largest tracked holder by dollar value, HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC, sizes it at 0.9% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.9pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in OLN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 386 tracked filers holding OLN, 206 increased or opened the position and 216 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in OLN between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 24
- RENAISSANCE TECHNOLOGIES LLC$6M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$6M
- Man Group plc$5M
- AQR Arbitrage LLC$5M
- HSBC HOLDINGS PLC$4M
- Royal Palms Capital LLC$3M
Full exits 49
- NORGES BANK$35M
- Amundi$20M
- Wolf Hill Capital Management, LP$19M
- Merewether Investment Management, LP$19M
- SG Americas Securities, LLC$11M
- ExodusPoint Capital Management, LP$7M
Largest adds
- AQR CAPITAL MANAGEMENT LLC$75M
- BlackRock, Inc.$53M
- CAPTRUST FINANCIAL ADVISORS$26M
- JPMORGAN CHASE & CO$13M
- LOS ANGELES CAPITAL MANAGEMENT LLC$6M
- Allianz Asset Management GmbH$5M
Largest trims
- HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC$131M
- FULLER & THALER ASSET MANAGEMENT, INC.$64M
- PZENA INVESTMENT MANAGEMENT LLC$55M
- VANGUARD PORTFOLIO MANAGEMENT LLC$54M
- VANGUARD CAPITAL MANAGEMENT LLC$48M
- STATE STREET CORP$48M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC added | 16,021,214 | $318M | 14.8% | 2026-Q2 |
| BlackRock, Inc. added | 11,984,254 | $238M | 11.1% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 6,166,477 | $122M | 5.7% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 5,510,335 | $109M | 5.1% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 5,447,478 | $108M | 5.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 5,138,572 | $102M | 4.7% | 2026-Q2 |
| STATE STREET CORP trimmed | 4,799,788 | $95M | 4.4% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. trimmed | 4,301,590 | $85M | 4.0% | 2026-Q2 |
| YACKTMAN ASSET MANAGEMENT LP added | 4,209,403 | $83M | 3.9% | 2026-Q2 |
| PZENA INVESTMENT MANAGEMENT LLC trimmed | 3,890,204 | $77M | 3.6% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 2,550,105 | $51M | 2.4% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 2,233,816 | $44M | 2.1% | 2026-Q2 |
| SEMPER AUGUSTUS INVESTMENTS GROUP LLC added | 2,153,826 | $43M | 2.0% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 2,107,148 | $42M | 1.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 1,543,162 | $31M | 1.4% | 2026-Q2 |
| MORGAN STANLEY trimmed | 1,384,610 | $27M | 1.3% | 2026-Q2 |
| CAPTRUST FINANCIAL ADVISORS added | 1,321,951 | $26M | 1.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 1,284,002 | $25M | 1.2% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 1,200,056 | $24M | 1.1% | 2026-Q2 |
| NORTHERN TRUST CORP added | 1,004,672 | $20M | 0.9% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 976,669 | $20M | 1.0% | 2026-Q2 |
| Allianz Asset Management GmbH added | 972,709 | $19M | 0.9% | 2026-Q2 |
| Invesco Ltd. added | 779,328 | $15M | 0.7% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 773,430 | $15M | 0.7% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 744,606 | $15M | 0.7% | 2026-Q2 |
| UBS Group AG trimmed | 720,044 | $14M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 719,513 | $14M | 0.7% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 683,398 | $14M | 0.6% | 2026-Q2 |
| FMR LLC trimmed | 615,925 | $12M | 0.6% | 2026-Q2 |
| Nuveen, LLC added | 584,249 | $12M | 0.5% | 2026-Q2 |
| PDT Partners, LLC added | 558,806 | $11M | 0.5% | 2026-Q2 |
| Gotham Asset Management, LLC trimmed | 552,774 | $11M | 0.5% | 2026-Q2 |
| Empowered Funds, LLC added | 505,046 | $10M | 0.5% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 491,216 | $10M | 0.5% | 2026-Q2 |
| SEGALL BRYANT & HAMILL, LLC trimmed | 490,909 | $10M | 0.5% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 483,174 | $10M | 0.4% | 2026-Q2 |
| MetLife Investment Management, LLC trimmed | 457,439 | $9M | 0.4% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 452,869 | $9M | 0.4% | 2026-Q2 |
| KLCM Advisors, Inc. trimmed | 448,278 | $9M | 0.4% | 2026-Q2 |
| CenterBook Partners LP added | 441,585 | $9M | 0.4% | 2026-Q2 |
| Retirement Systems of Alabama trimmed | 431,103 | $9M | 0.4% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 428,602 | $8M | 0.4% | 2026-Q2 |
| Quantinno Capital Management LP added | 426,132 | $8M | 0.4% | 2026-Q2 |
| GRIZZLYROCK CAPITAL, LLC trimmed | 395,094 | $8M | 0.4% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 355,085 | $7M | 0.3% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 344,951 | $7M | 0.3% | 2026-Q2 |
| Old West Investment Management, LLC added | 323,869 | $6M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 317,742 | $6M | 0.3% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC trimmed | 299,428 | $6M | 0.3% | 2026-Q2 |
| LPL Financial LLC added | 292,319 | $6M | 0.3% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC added | 289,311 | $6M | 0.3% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 283,500 | $6M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 279,364 | $6M | 0.3% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 277,898 | $6M | 0.3% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 264,487 | $5M | 0.2% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 260,709 | $5M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 258,674 | $5M | 0.2% | 2026-Q2 |
| Man Group plc added | 251,926 | $5M | 0.2% | 2026-Q2 |
| AQR Arbitrage LLC new | 228,711 | $5M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 228,532 | $5M | 0.2% | 2026-Q2 |
| GABELLI FUNDS LLC trimmed | 220,285 | $4M | 0.2% | 2026-Q2 |
| Stanley-Laman Group, Ltd. added | 215,050 | $4M | 0.2% | 2026-Q2 |
| Engineers Gate Manager LP added | 210,478 | $4M | 0.2% | 2026-Q2 |
| XTX Topco Ltd added | 207,700 | $4M | 0.2% | 2026-Q2 |
| Legal & General Group Plc trimmed | 191,875 | $4M | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 187,845 | $4M | 0.2% | 2026-Q2 |
| STIFEL FINANCIAL CORP added | 185,248 | $4M | 0.2% | 2026-Q2 |
| GAMCO INVESTORS, INC. ET AL added | 180,095 | $4M | 0.2% | 2026-Q2 |
| MARSHALL WACE, LLP added | 166,146 | $3M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 160,552 | $3M | 0.1% | 2026-Q2 |
| Royal Palms Capital LLC new | 156,798 | $3M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 150,045 | $3M | 0.1% | 2026-Q2 |
| Loews Corp trimmed | 150,000 | $3M | 0.1% | 2026-Q2 |
| CITIGROUP INC trimmed | 143,304 | $3M | 0.1% | 2026-Q2 |
| HATCH COVE CAPITAL, LLC new | 135,600 | $3M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 131,149 | $3M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 129,888 | $4M | 0.2% | 2026-Q2 |
| Mariner, LLC added | 125,257 | $2M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 124,094 | $2M | 0.1% | 2026-Q2 |
| Oak Thistle LLC added | 121,105 | $2M | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 120,350 | $2M | 0.1% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 118,447 | $2M | 0.1% | 2026-Q2 |
| ING GROEP NV new | 114,630 | $2M | 0.1% | 2026-Q2 |
| Creative Planning added | 112,390 | $2M | 0.1% | 2026-Q2 |
| Bridgewater Associates, LP trimmed | 111,412 | $2M | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 111,292 | $2M | 0.1% | 2026-Q2 |
| Jain Global LLC trimmed | 105,041 | $2M | 0.1% | 2026-Q2 |
| Saba Capital Management, L.P. added | 101,910 | $2M | 0.1% | 2026-Q2 |
| Tiptree Advisors, LLC trimmed | 100,000 | $2M | 0.1% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 96,803 | $2M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 94,948 | $2M | 0.1% | 2026-Q2 |
| FIFTH THIRD BANCORP trimmed | 92,705 | $2M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 91,690 | $2M | 0.1% | 2026-Q2 |
| JUPITER ASSET MANAGEMENT LTD new | 90,996 | $2M | 0.1% | 2026-Q2 |
| Vident Advisory, LLC added | 88,901 | $2M | 0.1% | 2026-Q2 |
| WINTON GROUP Ltd added | 88,153 | $2M | 0.1% | 2026-Q2 |
| WEDGE CAPITAL MANAGEMENT L L P/NC added | 88,044 | $2M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 84,938 | $2M | 0.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 81,119 | $2M | 0.1% | 2026-Q2 |
| DBA TRADING, LLC | 60,000 | $2M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.