Koppers Holdings, Inc. (KOP)
NYSE: KOP · Lumber & Wood Products (No Furniture) · Pittsburgh, PA · filing with the SEC since 2005
Grade5.6
◀ Past 6.6● Present 5.8▶ Future 4.3
Who owns Koppers Holdings, Inc.
As filed with the SECHolders of 5% or more
3
Blackrock, Inc. holds 15.3% of Common Stock, as its SCHEDULE 13G/A filed Apr 24, 2026 says.
Directors and officers
16
report now, of 38 people on the record since 2002. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 24, 2026 · Common Stock · 17.8% in Apr 23, 2025
Dimensional Fund Advisors LP
SCHEDULE 13G/A · filed Oct 8, 2026 · Common Stock
Simcoe Capital Management, LLC
SCHEDULE 13D/A · filed Oct 22, 2026 · Common Stock · 7% in May 19, 2026
Fuller & Thaler Asset Management, Inc.
SCHEDULE 13G/A · filed May 13, 2026 · Common Stock · reported falling below 5%
Vanguard Capital Management
SCHEDULE 13G/A · filed Jul 31, 2026 · Common Stock · reported falling below 5%, from 5.08% in Apr 30, 2026
Pzena Investment Management LLC
SCHEDULE 13G/A · filed Oct 19, 2026 · Common Stock · reported falling below 5%, from 6.1% in Apr 28, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%, from 7.8% in Oct 31, 2025
What KOP reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Koppers (China) Carbon & Chemical Company Limited [ Member]
An investee · investee · invested in, named in the 10-K filed Feb 26, 2026
Greenhill Reload, LLC
A company bought · acquisition · owns, named in the 10-K filed Feb 26, 2026
61 subsidiaries in 17 countries, from the list filed with the 10-K filed Feb 26, 2026.
Insider tradesForm 4
14sales
0purchases
0sales on a scheduled plan
4people selling
$5.6Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window4 of 38 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Sullivan James A. | President and CTO | 3 | $4.4M | 0 | 0 | $0 |
| Ball M Leroy | CEO | 9 | $1.1M | 0 | 0 | $0 |
| Lucas Stephen G | SVP, Culture and Engagement | 1 | $100,000 | 0 | 0 | $0 |
| Pearce Bradley A | CAO | 1 | $100,000 | 0 | 0 | $0 |