$KOP

$41.44 +$1.61 (4.04%) Close

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

Ownership

13F as of Q2 2026 · 18.9M shares outstanding

Who owns KOP?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 64.8%

BlackRock, Inc. 16.1% · Simcoe Capital Management, LLC 7.5%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

217

+13 vs last qtr

Net shares bought

+314.7K

by institutions in Q2 2026

New / sold out

33 / 20

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Simcoe Capital Management, LLC +471.7K
American Century Companies Inc +313.1K

Biggest sellers in Q2 2026

Two Sigma Investments, LP −151.5K
Pzena Investment Management LLC −148.1K

Who is planning to sell?

Notices of proposed sale, last 12 months

$4.63M

5 notices from 4 people

Shares covered

93.3K

0.49% 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

Sullivan James A. Officer $4.38M
Pearce Bradley A Officer $102K

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

−3.1%

−0.35% a year

Each share's claim on the business

+3.2%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$184M vs $134M

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 years13% 1–3 years10% Under 1 year13%

Quarterly turnover

8.0%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting KOP on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	3.0M	16.12%	+2.5K (+0.1%)	≤2021	0.0%
Shares held by quarter Peak holding4.0M (Q4'24) Change over 8 quarters−771.3K Share of the company16.120% BlackRock, Inc.'s full portfolio →
SC Simcoe Capital Management, LLC 13D · 5.6%	1.4M	7.49%	+471.7K (+49.9%)	Q4 '25	11.6%
Shares held by quarter Peak holding1.4M (Q2'26) Change over 8 quarters+1.4M Share of the company7.490% Disclosed stake13D · 5.6% Simcoe Capital Management, LLC's full portfolio →

BlackRock, Inc.

3.0M

% of company

16.12%

Change vs last qtr

+2.5K (+0.1%)

Held since

≤2021

Simcoe Capital Management, LLC

13D · 5.6%

1.4M

% of company

7.49%

Change vs last qtr

+471.7K (+49.9%)

Held since

Q4 '25

28 more super investors behind a free account

See every manager holding Koppers Holdings Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting KOP on Form N-PORT; together they hold 50.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Small-Cap ETF iShares Trust	$52M	1.2M	6.13%	0.05%	June 30, 2026
UM Undiscovered Managers Behavioral Value Fund Undiscovered Managers Funds	$34.6M	770.0K	4.07%	0.38%	June 30, 2026

iShares Core S&P Small-Cap ETF

iShares Trust

Position value

$52M

% of company

6.13%

% of the fund

0.05%

As of

June 30, 2026

Undiscovered Managers Behavioral Value Fund

Undiscovered Managers Funds

Position value

$34.6M

% of company

4.07%

% of the fund

0.38%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Koppers Holdings Inc 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
JJ Jacobowitz Jeffrey 5%+ holder 13D · 5.6%	1.1M	5.62%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company5.620% Disclosed stake13D · 5.6% View the 13D/G filing →
SP Simcoe Partners L P 5%+ holder 13D · 4.6%	873.5K	4.62%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company4.620% Disclosed stake13D · 4.6% View the 13D/G filing →

Jacobowitz Jeffrey

5%+ holder13D · 5.6%

1.1M

% of company

5.62%

Change vs last qtr

—

Held since

—

Simcoe Partners L P

5%+ holder13D · 4.6%

873.5K

% of company

4.62%

Change vs last qtr

—

Held since

—

20 more holders behind a free account

See every insider and 5%+ holder of Koppers Holdings Inc.

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