$OLN

$16.47 +$0.53 (3.32%) Live

$OLN Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 114.0M shares outstanding

Who owns OLN?

By type of holder

Institutions 99.3% Insiders 0.4% Everyone else 0.3%

Concentration Top 10 holders own 59.2%

Hotchkis & Wiley Capital Management LLC 14.1% · BlackRock, Inc. 10.5%

Institutional ownership

99.3%

+0.5 pts vs last qtr

Institutional holders

412

-10 vs last qtr

Net shares bought

+548.2K

by institutions in Q2 2026

New / sold out

72 / 82

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Aqr Capital Management LLC +4.3M
Captrust Financial Advisors +1.3M

Biggest sellers in Q2 2026

Millennium Management LLC −984.4K
Fuller & Thaler Asset Management, Inc. −714.3K

Who is planning to sell?

Notices of proposed sale, last 12 months

$2.34M

5 notices from 5 people

Shares covered

111.4K

0.10% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Todd A. Slater Officer $1.92M
Deon Carter Officer $158K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

−30.6%

−3.98% a year

Each share's claim on the business

+44.2%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$2.86B vs $132M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years64% 3–5 years19% 1–3 years6% Under 1 year11%

Quarterly turnover

13.7%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting OLN on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
HW Hotchkis & Wiley Capital Management LLC	16.0M	14.06%	+937.0K (+6.2%)	2022	0.9%
Shares held by quarter Peak holding16.0M (Q2'26) Change over 8 quarters+7.2M Share of the company14.060% Hotchkis & Wiley Capital Management LLC's full portfolio →
B BlackRock, Inc.	12.0M	10.51%	+497.4K (+4.3%)	≤2021	0.0%
Shares held by quarter Peak holding12.7M (Q2'25) Change over 8 quarters+187.7K Share of the company10.510% BlackRock, Inc.'s full portfolio →

Hotchkis & Wiley Capital Management LLC

16.0M

% of company

14.06%

Change vs last qtr

+937.0K (+6.2%)

Held since

2022

BlackRock, Inc.

12.0M

% of company

10.51%

Change vs last qtr

+497.4K (+4.3%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Olin Corp, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting OLN on Form N-PORT; together they hold 48.2% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VW Vanguard Windsor II Fund Vanguard Windsor Funds	$92.7M	5.0M	4.39%	0.14%	July 31, 2026
IC iShares Core S&P Mid-Cap ETF iShares Trust	$77.2M	3.9M	3.42%	0.06%	June 30, 2026

Vanguard Windsor II Fund

Vanguard Windsor Funds

Position value

$92.7M

% of company

4.39%

% of the fund

0.14%

As of

July 31, 2026

iShares Core S&P Mid-Cap ETF

iShares Trust

Position value

$77.2M

% of company

3.42%

% of the fund

0.06%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Olin Corp and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
ST Slater Todd A Insider	164.9K	0.14%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.140% Slater Todd A's insider activity →
LK Lane Kenneth Todd Insider	100.3K	0.09%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.090% Lane Kenneth Todd's insider activity →

Slater Todd A

Insider

164.9K

% of company

0.14%

Change vs last qtr

—

Held since

—

Lane Kenneth Todd

Insider

100.3K

% of company

0.09%

Change vs last qtr

—

Held since

—

7 more holders behind a free account

See every insider and 5%+ holder of Olin Corp.

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