Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Koppers Holdings Inc.

CIK 0001315257KOP· quarter ending 2026-06-30
Shares outstanding
18,911,568
Held by 13F filers
19,406,249
102.6% of shares outstanding
Holders
217
+13 vs 2026-03-31 · 33 new, 20 exited
Value
$871.2M
shares +1.6% vs prior quarter
13F holdings exceed the share count. This is normal for heavily shorted stocks: shares lent to short sellers are reported by the lender and again by whoever bought them. Related filers occasionally report the same position twice as well.

Share classes (cover page of the 10-Q filed 2026-08-06, as of 2026-07-31)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common stockKOP · NYSE18,911,56819,406,249102.6%21750060P106

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine
CountCUSIPClass (as filers write it)HoldersShares heldClass shares% of classValueOptionsMapped via
50060P106COM21719,406,24918,911,568102.6%$871.2M2 call / 0 put13DGholders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings. 1 further CUSIPs map to this company (mostly bonds) but no 13F filer held them this quarter.

Top holders (217 of 217 · 50060P106)

change vs 2026-03-31
#FilerShares% of classValueChange
1BlackRock, Inc.3,047,60316.12%$136.8M+2,491 (+0.1%)
2Simcoe Capital Management, LLC1,416,1607.49%$63.6M+471,730 (+49.9%)
3DIMENSIONAL FUND ADVISORS LP1,237,2496.54%$55.6M+45,891 (+3.9%)
4PZENA INVESTMENT MANAGEMENT LLC1,061,2855.61%$47.7M-148,091 (-12.2%)
5FULLER & THALER ASSET MANAGEMENT, INC.943,2794.99%$42.4M-35,311 (-3.6%)
6LSV ASSET MANAGEMENT941,8814.98%$42.3M+15,850 (+1.7%)
7AMERICAN CENTURY COMPANIES INC848,0684.48%$38.1M+313,066 (+58.5%)
8VANGUARD CAPITAL MANAGEMENT LLC812,6294.30%$36.5M-27,817 (-3.3%)
9STATE STREET CORP804,5534.25%$36.1M+52,289 (+7.0%)
10VANGUARD PORTFOLIO MANAGEMENT LLC539,0472.85%$24.2M+8,515 (+1.6%)
11GEODE CAPITAL MANAGEMENT, LLC483,4172.56%$21.7M+15,808 (+3.4%)
12Quaker Capital Investments, LLC408,5552.16%$18.3M-49,297 (-10.8%)
13CHARLES SCHWAB INVESTMENT MANAGEMENT INC384,1222.03%$17.2M-93,756 (-19.6%)
14Invesco Ltd.332,6051.76%$14.9M+147,019 (+79.2%)
15AMERIPRISE FINANCIAL INC285,6561.51%$12.8M+23,868 (+9.1%)
16TWO SIGMA INVESTMENTS, LP266,0521.41%$11.9M-151,484 (-36.3%)
17NORTHERN TRUST CORP253,4811.34%$11.4M+8,318 (+3.4%)
18MORGAN STANLEY242,9241.28%$10.9M+21,388 (+9.7%)
19Dana Investment Advisors, Inc.231,3991.22%$10.4M-3,836 (-1.6%)
20Bank of New York Mellon Corp222,5701.18%$10.0M-1,686 (-0.8%)
21CSM Advisors, LLC194,3451.03%$8.7M-210 (-0.1%)
22ARROWSTREET CAPITAL, LIMITED PARTNERSHIP189,2001.00%$8.5M+27,128 (+16.7%)
23GOLDMAN SACHS GROUP INC158,8090.84%$7.1M+13,964 (+9.6%)
24BRIDGEWAY CAPITAL MANAGEMENT, LLC153,7400.81%$6.9M+6,214 (+4.2%)
25HUNTINGTON NATIONAL BANK146,5870.78%$6.6M-10,512 (-6.7%)
26PRINCIPAL FINANCIAL GROUP INC136,7190.72%$6.1M+1,133 (+0.8%)
27Universal- Beteiligungs- und Servicegesellschaft mbH130,5840.69%$5.9M+734 (+0.6%)
28Russell Investments Group, Ltd.129,7200.69%$5.8M-53,501 (-29.2%)
29VANGUARD FIDUCIARY TRUST CO125,9380.67%$5.7M-278 (-0.2%)
30SEIZERT CAPITAL PARTNERS, LLC122,7220.65%$5.5M+9,587 (+8.5%)
31JPMORGAN CHASE & CO122,3540.65%$5.5M+31,675 (+34.9%)
32BANK OF AMERICA CORP /DE/117,9160.62%$5.3M-11,032 (-8.6%)
33Pacer Advisors, Inc.114,0720.60%$5.1MNEW
34O'SHAUGHNESSY ASSET MANAGEMENT, LLC105,3660.56%$4.7M-4,488 (-4.1%)
35Empowered Funds, LLC102,7870.54%$4.6M+6,214 (+6.4%)
36DENALI ADVISORS LLC96,0920.51%$4.3M+41,127 (+74.8%)
37Santori & Peters, Inc.83,8340.44%$3.8M+4,828 (+6.1%)
38KESTREL INVESTMENT MANAGEMENT CORP83,4500.44%$3.7M—
39AQR CAPITAL MANAGEMENT LLC78,2050.41%$3.5M-17,262 (-18.1%)
40JB CAPITAL PARTNERS LP78,1010.41%$3.5M—
41FRANKLIN RESOURCES INC70,2430.37%$3.2M+7,800 (+12.5%)
42Public Sector Pension Investment Board66,0640.35%$3.0M-4,155 (-5.9%)
43FIRST TRUST ADVISORS LP65,5330.35%$2.9M+1,392 (+2.2%)
44FEDERATED HERMES, INC.62,7810.33%$2.8M-5,072 (-7.5%)
45IRONWOOD INVESTMENT MANAGEMENT LLC58,1160.31%$2.6M-1,300 (-2.2%)
46Villanova Investment Management Co LLC55,8350.30%$2.5M—
47JANE STREET GROUP, LLC54,0100.29%$2.4M-92,939 (-63.2%)
48Nuveen, LLC51,0230.27%$2.3M-12,096 (-19.2%)
49UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC50,6680.27%$2.3M-8,234 (-14.0%)
50RHUMBLINE ADVISERS49,7240.26%$2.2M-8,143 (-14.1%)
51XTX Topco Ltd46,4340.25%$2.1M+21,785 (+88.4%)
52Vanguard Global Advisers, LLC46,3000.24%$2.1M—
53CITIGROUP INC46,1740.24%$2.1M-17,636 (-27.6%)
54Pacific Ridge Capital Partners, LLC42,9950.23%$1.9M-494 (-1.1%)
55Creative Planning40,2100.21%$1.8M+21,816 (+118.6%)
56Legal & General Group Plc39,7230.21%$1.8M-3,294 (-7.7%)
57Swiss National Bank36,9000.20%$1.7M-2,400 (-6.1%)
58VICTORY CAPITAL MANAGEMENT INC35,0000.19%$1.6M-2,150 (-5.8%)
59UBS Group AG33,8220.18%$1.5M+1,216 (+3.7%)
60SEI INVESTMENTS CO33,8180.18%$1.5M-36,161 (-51.7%)
61BNP PARIBAS ASSET MANAGEMENT Holding S.A.33,4910.18%$1.5M+6,880 (+25.9%)
62PRUDENTIAL FINANCIAL INC33,2240.18%$1.5M+13,295 (+66.7%)
63ACADIAN ASSET MANAGEMENT LLC33,1250.18%$1.5M+6,290 (+23.4%)
64NEW YORK STATE COMMON RETIREMENT FUND31,2700.17%$1.4M+10,800 (+52.8%)
65VOYA INVESTMENT MANAGEMENT LLC30,8850.16%$1.4M+566 (+1.9%)
66NOMURA ASSET MANAGEMENT INTERNATIONAL INC.30,6000.16%$1.4M—
67PRICE T ROWE ASSOCIATES INC /MD/29,3400.16%$1.3M+4,449 (+17.9%)
68GAMCO INVESTORS, INC. ET AL28,8140.15%$1.3M—
69GLOBEFLEX CAPITAL L P27,1900.14%$1.2M—
70Quantinno Capital Management LP24,6370.13%$1.1M+4,798 (+24.2%)
71HANCOCK WHITNEY CORP24,4180.13%$1.1M+6,751 (+38.2%)
72ALLIANCEBERNSTEIN L.P.23,9330.13%$926K+5,130 (+27.3%)
73Campbell & CO Investment Adviser LLC23,2220.12%$1.0M+13,941 (+150.2%)
74STATE OF WISCONSIN INVESTMENT BOARD23,0480.12%$1.0M-10,696 (-31.7%)
75LAZARD ASSET MANAGEMENT LLC21,5930.11%$970K+198 (+0.9%)
76INTECH INVESTMENT MANAGEMENT LLC20,7790.11%$933K+9,348 (+81.8%)
77D. E. Shaw & Co., Inc.20,4620.11%$919K+7,951 (+63.6%)
78CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM19,9750.11%$897K+1,267 (+6.8%)
79Horizon Investments, LLC19,2500.10%$864K+422 (+2.2%)
80KLP KAPITALFORVALTNING AS18,4000.10%$826K—
81DEUTSCHE BANK AG\17,5820.09%$789K+1,179 (+7.2%)
82RAYMOND JAMES FINANCIAL INC17,3750.09%$780K+6,582 (+61.0%)
83CANADA LIFE ASSURANCE Co16,0220.08%$719K-1,378 (-7.9%)
84Covestor Ltd15,9550.08%$716K+15,923 (+49759.4%)
85HARBOR CAPITAL ADVISORS, INC.15,9340.08%$715K+1,201 (+8.2%)
86WELLS FARGO & COMPANY/MN15,5640.08%$699K+8,239 (+112.5%)
87Vident Advisory, LLC15,4600.08%$694K—
88FIFTH THIRD BANCORP15,1890.08%$682K-744 (-4.7%)
89Marble Wealth, LLC15,0850.08%$677K—
90Janney Montgomery Scott LLC14,1660.07%$636K+5,174 (+57.5%)
91Allspring Global Investments Holdings, LLC14,1380.07%$635K+444 (+3.2%)
92Kennondale Capital Management LLC13,5780.07%$610K—
93Pathstone Holdings, LLC13,2360.07%$594K-1,215 (-8.4%)
94State of Tennessee, Department of Treasury12,6820.07%$569K-2,574 (-16.9%)
95Thrivent Financial for Lutherans12,6290.07%$567K-463 (-3.5%)
96AdvisorShares Investments LLC12,6000.07%$566KNEW
97JACOBS LEVY EQUITY MANAGEMENT, INC12,5930.07%$565K-7,505 (-37.3%)
98MANGROVE PARTNERS IM, LLC12,4860.07%$561K+6,734 (+117.1%)
99HRT FINANCIAL LP12,4700.07%$559K-73,305 (-85.5%)
100VANGUARD ASSET MANAGEMENT, Ltd12,0080.06%$539K—
101Engineers Gate Manager LP11,9400.06%$536K-26,503 (-68.9%)
102Gotham Asset Management, LLC11,5220.06%$517KNEW
103Squarepoint Ops LLC11,3040.06%$508K+5,744 (+103.3%)
104MetLife Investment Management, LLC11,2170.06%$504K—
105HSBC HOLDINGS PLC11,0950.06%$504K+2,618 (+30.9%)
106Bristlecone Value Partners, LLC10,6500.06%$478K—
107Illinois Municipal Retirement Fund10,2630.05%$461K+62 (+0.6%)
108Mariner, LLC10,0330.05%$451K-9,980 (-49.9%)
109VIRGINIA RETIREMENT SYSTEMS ET Al9,9000.05%$445KNEW
110EP Wealth Advisors, LLC9,8100.05%$440K-430 (-4.2%)
111PDT Partners, LLC9,5830.05%$430K—
112Jupiter Topco LLC9,2080.05%$413KNEW
113Boston Partners9,1770.05%$412K-7,401 (-44.6%)
114State of Wyoming8,5500.05%$384K+1,846 (+27.5%)
115Integrated Quantitative Investments LLC8,4360.04%$379KNEW
116MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.8,4170.04%$378K-588 (-6.5%)
117Louisiana State Employees Retirement System8,4000.04%$377K-300 (-3.4%)
118Daytona Street Capital LLC8,0000.04%$382K—
119Zurcher Kantonalbank (Zurich Cantonalbank)7,6700.04%$344K+1,379 (+21.9%)
120State of Alaska, Department of Revenue7,1560.04%$320K-3,544 (-33.1%)
121Atria Investments, Inc7,0460.04%$316K+59 (+0.8%)
122ENVESTNET ASSET MANAGEMENT INC6,9800.04%$313K-153 (-2.1%)
123EntryPoint Capital, LLC6,6520.04%$299K-8,860 (-57.1%)
124GUGGENHEIM CAPITAL LLC6,4340.03%$289K+1,054 (+19.6%)
125JONES FINANCIAL COMPANIES LLLP5,7830.03%$261K+2,622 (+82.9%)
126D.B. Root & Company, LLC5,7050.03%$256K—
127STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM5,7030.03%$256K-18,862 (-76.8%)
128QUADRANT CAPITAL GROUP LLC5,5680.03%$250K—
129TEACHER RETIREMENT SYSTEM OF TEXAS5,3850.03%$242KNEW
130PNC Financial Services Group, Inc.5,3610.03%$241K+71 (+1.3%)
131Police & Firemen's Retirement System of New Jersey5,3340.03%$239K—
132DekaBank Deutsche Girozentrale5,2220.03%$199K—
133AMALGAMATED BANK5,1400.03%$231K-483 (-8.6%)
134SG Americas Securities, LLC5,1140.03%$230K+868 (+20.4%)
135ARIZONA STATE RETIREMENT SYSTEM5,0690.03%$228K-319 (-5.9%)
136TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY4,9900.03%$224K—
137Swiss Life Asset Management Ltd4,9420.03%$222KNEW
138Kestra Advisory Services, LLC4,9300.03%$221K-367 (-6.9%)
139YOUSIF CAPITAL MANAGEMENT, LLC4,8320.03%$217K-419 (-8.0%)
140Mitsubishi UFJ Trust & Banking Corp4,8210.03%$216KNEW
141MANUFACTURERS LIFE INSURANCE COMPANY, THE4,8120.03%$216K-368 (-7.1%)
142MIRABELLA FINANCIAL SERVICES LLP4,7680.03%$214KNEW
143GLENMEDE TRUST CO NA4,6210.02%$207KNEW
144Vanguard Personalized Indexing Management, LLC4,5710.02%$205KNEW
145Vanguard Investments Australia, Ltd.4,5620.02%$205K—
146COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS4,5610.02%$205KNEW
147OREGON PUBLIC EMPLOYEES RETIREMENT FUND4,4200.02%$198K-100 (-2.2%)
148STRS OHIO4,4000.02%$198KNEW
149WEALTH ENHANCEMENT ADVISORY SERVICES, LLC4,3020.02%$205KNEW
150BNP PARIBAS FINANCIAL MARKETS3,2600.02%$146K-1,414 (-30.3%)
151ROYAL BANK OF CANADA3,2490.02%$146K+764 (+30.7%)
152NEW YORK STATE TEACHERS RETIREMENT SYSTEM3,1110.02%$140K+94 (+3.1%)
153FMR LLC3,0710.02%$138K+446 (+17.0%)
154BARCLAYS PLC2,7620.01%$124K-5,823 (-67.8%)
155Copeland Capital Management, LLC2,0950.01%$94K-95 (-4.3%)
156Ensign Peak Advisors, Inc1,8700.01%$84K-300 (-13.8%)
157Ameritas Investment Partners, Inc.1,6140.01%$72K—
158FINANCIAL CONSULATE, INC1,5000.01%$67K—
159Mirae Asset Global Investments Co., Ltd.1,2320.01%$55KNEW
160PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO1,1200.01%$50K-1,455 (-56.5%)
161NISA INVESTMENT ADVISORS, LLC1,0060.01%$45K+360 (+55.7%)
162GAMMA Investing LLC9780.01%$44K+13 (+1.3%)
163Tower Research Capital LLC (TRC)8560.00%$38K-1,064 (-55.4%)
164Parallel Advisors, LLC7530.00%$34K+27 (+3.7%)
165Versant Capital Management, Inc7150.00%$32K-14 (-1.9%)
166Nykredit A/S6880.00%$31KNEW
167ASSETMARK, INC6790.00%$30KNEW
168Quantum Portfolio Management LLC6490.00%$29KNEW
169BROWN, LISLE/CUMMINGS, INC.6170.00%$28K—
170Arax Advisory Partners5990.00%$27K+487 (+434.8%)
171US BANCORP \DE\5130.00%$23K-37 (-6.7%)
172Blue Trust, Inc.4880.00%$22K-9 (-1.8%)
173OSAIC HOLDINGS, INC.4240.00%$19K+8 (+1.9%)
174Pinnacle Wealth Planning Services, Inc.4120.00%$18K+7 (+1.7%)
175Salomon & Ludwin, LLC3730.00%$17K—
176Allworth Financial LP3680.00%$17K+165 (+81.3%)
177Sterling Capital Management LLC3680.00%$17K-258 (-41.2%)
178HANTZ FINANCIAL SERVICES, INC.3490.00%$16K+33 (+10.4%)
179WealthCollab, LLC3220.00%$14K—
180Rockefeller Capital Management L.P.2730.00%$12K-209 (-43.4%)
181SIGNATUREFD, LLC2220.00%$10K+119 (+115.5%)
182Smartleaf Asset Management LLC2070.00%$9K—
183TRUST CO OF TOLEDO NA /OH/1910.00%$9K—
184EverSource Wealth Advisors, LLC1880.00%$8K-28 (-13.0%)
185Skylands Capital, LLC1750.00%$8K-20,875 (-99.2%)
186Essential Partners LLC1630.00%$7K-25 (-13.3%)
187LOS ANGELES CAPITAL MANAGEMENT LLC1560.00%$7K—
188BESSEMER GROUP INC1480.00%$7K—
189LRI Investments, LLC1460.00%$7K—
190Farther Finance Advisors, LLC1090.00%$5K-77 (-41.4%)
191SJS Investment Consulting Inc.1090.00%$5KNEW
192Optiver Holding B.V.910.00%$4KNEW
193IFP Advisors, Inc870.00%$4K—
194NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO800.00%$4K—
195BARROW HANLEY MEWHINNEY & STRAUSS LLC800.00%$4KNEW
196Quarry LP610.00%$3KNEW
197Dogwood Wealth Management LLC600.00%$3KNEW
198UMB Bank, n.a.600.00%$3K+6 (+11.1%)
199PICTON MAHONEY ASSET MANAGEMENT600.00%$3KNEW
200KELLEHER FINANCIAL ADVISORS560.00%$3KNEW
201Keating Financial Advisory Services, Inc.490.00%$2K—
202Larson Financial Group LLC420.00%$2KNEW
203Parkside Financial Bank & Trust390.00%$2K—
204Cedar Mountain Advisors, LLC350.00%$2K—
205Plante Moran Financial Advisors, LLC290.00%$1KNEW
206ROTHSCHILD INVESTMENT LLC150.00%$674—
207FARMERS & MERCHANTS INVESTMENTS INC130.00%$584—
208Capital Advisors, Ltd. LLC120.00%$1K—
209Evolution Advisers, Inc.80.00%$0NEW
210Ankerstar Wealth, LLC70.00%$314—
211HARBOUR INVESTMENTS, INC.70.00%$331NEW
212Clearstead Advisors, LLC50.00%$225NEW
213JFS WEALTH ADVISORS, LLC30.00%$135NEW
214True Wealth Design, LLC20.00%$90—
215GILPIN WEALTH MANAGEMENT, LLC20.00%$90—
216SBI Securities Co., Ltd.10.00%$45—
217Davis Capital Management10.00%$45NEW
Exited since 2026-03-31 (20 filers; largest 20 shown)
LORD, ABBETT & CO. LLC−90,000
MILLENNIUM MANAGEMENT LLC−52,015
Waterfront Wealth Inc.−41,495
Numerai GP LLC−36,329
SUSQUEHANNA INTERNATIONAL GROUP, LLP−31,638
Trexquant Investment LP−29,524
Balyasny Asset Management L.P.−14,356
Brooklyn Investment Group−10,982
J. Safra Sarasin Holding AG−10,255
JANUS HENDERSON GROUP PLC−9,208
DGS Capital Management, LLC−8,343
ROYCE & ASSOCIATES LP−8,237
Quadrature Capital Ltd−7,429
Baird Financial Group, Inc.−7,385
RENAISSANCE TECHNOLOGIES LLC−5,500
CWM, LLC−2,800
Kilter Group LLC−60
Root Financial Partners, LLC−50
MAI Capital Management−13
Sunbelt Securities, Inc.−11

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting personFormFiledEventShares% of class
Vanguard Capital ManagementSCHEDULE 13G/A2026-07-312026-06-30955,1504.96%
Jacobowitz JeffreySCHEDULE 13D2026-05-192026-05-121,349,0057%
SDR Partners, LLCSCHEDULE 13D2026-05-192026-05-1235,7850.2%
Simcoe Capital Management, LLCSCHEDULE 13D2026-05-192026-05-121,349,0057%
SIMCOE MANAGEMENT COMPANY, LLCSCHEDULE 13D2026-05-192026-05-121,313,2206.8%
SIMCOE PARTNERS L PSCHEDULE 13D2026-05-192026-05-121,226,3756.4%
Simcoe Select, LPSCHEDULE 13D2026-05-192026-05-1286,8450.5%
Fuller & Thaler Asset Management, Inc.SCHEDULE 13G/A2026-05-132026-03-31978,590.234.98%
BlackRock, Inc.SCHEDULE 13G/A2026-04-242026-03-312,952,52115.3%
The Vanguard GroupSCHEDULE 13G/A2026-03-272026-03-1300%
PZENA INVESTMENT MANAGEMENT LLCSCHEDULE 13G2025-04-282025-03-311,221,3286.1%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.