KOP

Koppers Holdings Inc Cross-source read
MaterialsCUSIP 50060P106

Among active 13F managers last quarter, 6 opened and 25 added, while 20 reduced; the largest holder to move was Simcoe Capital Management, LLC (+50%). Over the last 180 days, 4 insiders sold and none bought, a net -$5.4M in open-market trades.

Tracked 13F holders
188
81 in Q2 2026 filings
13F value (tracked)
$722.4M
Smart-money readMixed
Net sellingNet buying
Funds · active managers, latest 13F
31 adding · 20 trimming
Insiders · Form 4 open-market, 180d
0 buying · 4 selling · -$5.4M
US House · STOCK Act, 180d
0 buying · 0 selling

The legs disagree, or only one of them leans.

Who owns KOP?

188 tracked 13F filers · ranked by shares held

188 tracked 13F filers disclose a position in KOP as of the latest SEC 13F filings, a combined $722.4M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

#FundSharesPosition valueLast moveAs ofHistory
1BlackRock, Inc.3.0M
$117.8M
−18%
Reduced · −658K sh
Q1 2026
2Simcoe Capital Management, LLC1.4M
$63.6M
+50%
Added · +472K sh
Q2 2026
3Dimensional Fund Advisors LP1.2M
$46.1M
+1.5%
Added · +18K sh
Q1 2026
4Pzena Investment Management LLC1.1M
$47.7M
−12%
Reduced · −148K sh
Q2 2026
5Fuller & Thaler Asset Management, Inc.943K
$42.4M
−3.6%
Reduced · −35K sh
Q2 2026
6Vanguard Capital Management LLC840K
$32.5M
New filer
Inherited book · not a new buyer
Q1 2026
7State Street Corp805K
$36.1M
+7.0%
Added · +52K sh
Q2 2026
8American Century Companies Inc535K
$20.7M
+28%
Added · +116K sh
Q1 2026
9Vanguard Portfolio Management LLC531K
$20.5M
New filer
Inherited book · not a new buyer
Q1 2026
10Geode Capital Management, LLC483K
$21.7M
+3.4%
Added · +16K sh
Q2 2026
11Charles Schwab Investment Management Inc478K
$18.5M
−16%
Reduced · −91K sh
Q1 2026
12Two Sigma Investments, LP418K
$16.2M
+114%
Added · +222K sh
Q1 2026
13Quaker Capital Investments, LLC409K
$18.3M
−11%
Reduced · −49K sh
Q2 2026
14Ameriprise Financial Inc262K
$10.1M
−4.2%
Reduced · −11K sh
Q1 2026
15Northern Trust Corp245K
$9.5M
+2.6%
Added · +6K sh
Q1 2026
16Dana Investment Advisors, Inc.235K
$9.1M
−0.2%
Reduced · −534 sh
Q1 2026
17Bank of New York Mellon Corp224K
$8.7M
−3.0%
Reduced · −7K sh
Q1 2026
18Morgan Stanley222K
$8.6M
+5.5%
Added · +12K sh
Q1 2026
19Russell Investments Group, Ltd.183K
$7.1M
−13%
Reduced · −27K sh
Q1 2026
20Arrowstreet Capital, Limited Partnership162K
$6.3M
New
+162K sh
Q1 2026
21Bridgeway Capital Management, LLC148K
$5.7M
+5.3%
Added · +7K sh
Q1 2026
22Jane Street Group, LLC147K
$5.7M
New
+147K sh
Q1 2026
23Huntington National Bank147K
$6.6M
−6.7%
Reduced · −11K sh
Q2 2026
24Goldman Sachs Group Inc145K
$5.6M
+6.4%
Added · +9K sh
Q1 2026
25Principal Financial Group Inc136K
$5.2M
+16%
Added · +19K sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Is KOP being bought or sold by institutions?

Last quarter, 6 funds opened a new position in KOP and 25 added to an existing one, while 20 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).

Opened
6
funds took a first position
Added
25
added to an existing position
Reduced
20
reduced, still holding
Biggest moves · ranked by size of the change, positions above a floor

Funds that own KOP also own

CompanyCo-held byTheir position there
Apple IncAAPL90 funds$199.9B
Microsoft CorpMSFT89 funds$184.6B
JPMorgan Chase & CoJPM88 funds$40.9B
Alphabet Inc-CL AGOOGL87 funds$105.0B
Meta Platforms Inc-Class AMETA86 funds$75.0B
Bank Of America CorpBAC86 funds$22.8B
Nvidia CorpNVDA85 funds$265.1B
Alphabet Inc-CL CGOOG85 funds$90.8B
Berkshire Hathaway Inc-CL BBRK/B84 funds$23.4B
Eli Lilly & CoLLY83 funds$53.2B
Lam Research CorpLRCX83 funds$24.9B
Costco Wholesale CorpCOST83 funds$24.7B

Ranked by how many of KOP's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in KOP.

Insider activity (Form 4)

Full insider page →
Sells · 180d
$5.4M
4 insiders
Net · 180d
-$5.4M
11 open-market transactions
DateInsiderRoleActionSharesValue
Aug 31, 2026Ball M LeroyCEO, DirectorSell (S)4K$184K
Aug 19, 2026Ball M LeroyCEO, DirectorSell (S)3K$138K
Aug 12, 2026Lucas Stephen GSVP, Culture and EngagementSell (S)1K$58K
Aug 11, 2026Sullivan James A.President and CTOSell (S)8K$375K
Aug 10, 2026Pearce Bradley ACAOSell (S)2K$102K
Aug 7, 2026Sullivan James A.President and CTOSell (S)
2 lots, same day
80K$4.0M
Jun 18, 2026Ball M LeroyCEO, DirectorSell (S)3K$150K
Jun 11, 2026Ball M LeroyCEO, DirectorSell (S)4K$171K
May 13, 2026Ball M LeroyCEO, DirectorSell (S)3K$113K
Mar 17, 2026Ball M LeroyCEO, DirectorSell (S)2K$94K
Mar 2, 2026Ball M LeroyCEO, DirectorSell (S)
3 lots, same day
6K$231K
Aug 15, 2025Ball M LeroyCEO, DirectorSell (S)2K$75K

One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.

Do institutions, insiders and Congress agree?

Mixed signals

Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.

SEC EDGAR 13F + Form 4 + US House STOCK Act{ }get_ticker_confluence · API & MCP

Signals by source

Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive

SourceBuyingSellingNet
13F funds
Top 100 holders by value, passive included; the hero counts active managers only
4531
Insiders
Form 4 open-market
04-$5.4M
US House
STOCK Act trades
00$0
Sector rotation
KOP is in Materials, which smart money is rotating OUT OF
$2.8B

Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.

Institutional ownership over time

81 tracked filers in Q2 2026 filingsstill filing
084168Q3 2024Q1 2025Q3 2025Q1 2026Q2 2026
tracked filers holding their reported valueQ2 2026 filings so far: $225.3M
Each bar counts tracked filers with a position in that quarter's filings, so the newest bar excludes filers still on an earlier quarter. Arkolith's tracked universe has grown over this window; part of any long-run rise is coverage, not new buyers.

Recent filings

15 most recent

Keep exploring

Connected entities for KOP

Browse more

Build

Ask your agent what changed in KOP

This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/KOP/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for KOP.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + Form 4 insider transactions + the live filing stream, joined for KOP. Filings are public domain, sourced to SEC EDGAR.