Koppers Holdings Inc.
DE ˙ DB ˙ US50060P1066
34,20 € ↑0,40 (1,18%)
2026-06-01
AKTIENPREIS
SecurityDE:KO9 / Koppers Holdings Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership245,163 shares
Latest Disclosed Value $ 9,482,905
Northern Trust Corp reports 2.58% increase in ownership of KO9 / Koppers Holdings Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 245,163 shares of Koppers Holdings Inc. (DE:KO9) valued at $7,943,281 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 239,006 shares of Koppers Holdings Inc.. This represents a change in shares of 2.58% during the quarter. The current value of the position is $8,384,575 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F KOPPERS HOLDINGS COM 50060P106 245,163 6,157 2.58 9,483 46.51 0.0013
2026-02-17 2025-12-31 13F KOPPERS HOLDINGS COM 50060P106 239,006 -12,947 -5.14 6,472 -8.25 0.0008
2025-11-14 2025-09-30 13F KOPPERS HOLDINGS COM 50060P106 251,953 -5,204 -2.02 7,055 -14.67 0.0009
2025-08-13 2025-06-30 13F KOPPERS HOLDINGS COM 50060P106 257,157 14,056 5.78 8,268 21.47 0.0011
2025-05-13 2025-03-31 13F KOPPERS HOLDINGS COM 50060P106 243,101 -5,704 -2.29 6,807 -15.57 0.0010
2025-02-14 2024-12-31 13F KOPPERS HOLDINGS COM 50060P106 248,805 28,425 12.90 8,061 0.14 0.0011
2024-11-13 2024-09-30 13F KOPPERS HOLDINGS COM 50060P106 220,380 4,277 1.98 8,050 0.71 0.0013
2024-08-14 2024-06-30 13F KOPPERS HOLDINGS COM 50060P106 216,103 -6,360 -2.86 7,994 -34.87 0.0013
2024-05-14 2024-03-31 13F KOPPERS HOLDINGS COM 50060P106 222,463 -4,773 -2.10 12,273 5.45 0.0021
2024-02-13 2023-12-31 13F KOPPERS HOLDINGS COM 50060P106 227,236 -289 -0.13 11,639 29.35 0.0021
2023-11-13 2023-09-30 13F KOPPERS HOLDINGS COM 50060P106 227,525 2,030 0.90 8,999 17.02 0.0017
2023-08-11 2023-06-30 13F KOPPERS HOLDINGS COM 50060P106 225,495 -2,612 -1.15 7,689 -3.60 0.0015
2023-05-15 2023-03-31 13F KOPPERS HOLDINGS COM 50060P106 228,107 742 0.33 7,977 24.41 0.0016
2023-02-13 2022-12-31 13F KOPPERS HOLDINGS COM 50060P106 227,365 2,856 1.27 6,412 37.40 0.0013
2022-11-14 2022-09-30 13F KOPPERS HOLDINGS COM 50060P106 224,509 -4,473 -1.95 4,666 -10.01 0.0011
2022-08-12 2022-06-30 13F KOPPERS HOLDINGS COM 50060P106 228,982 -4,739 -2.03 5,185 -19.39 0.0011
2022-05-13 2022-03-31 13F KOPPERS HOLDINGS COM 50060P106 233,721 -5,808 -2.42 6,432 -14.21 0.0011
2022-02-08 2021-12-31 13F KOPPERS HOLDINGS COM 50060P106 239,529 -6,906 -2.80 7,497 -2.69 0.0012
2021-11-15 2021-09-30 13F KOPPERS HOLDINGS COM 50060P106 246,435 -1,270 -0.51 7,704 -3.87 0.0014
2021-08-13 2021-06-30 13F KOPPERS HOLDINGS COM 50060P106 247,705 -12,931 -4.96 8,014 -11.55 0.0014
2021-05-12 2021-03-31 13F KOPPERS HOLDINGS COM 50060P106 260,636 -12,169 -4.46 9,060 6.58 0.0017
2021-02-11 2020-12-31 13F KOPPERS HOLDINGS COM 50060P106 272,805 -8,761 -3.11 8,501 44.38 0.0017
2020-11-16 2020-09-30 13F KOPPERS HOLDINGS COM 50060P106 281,566 -17,020 -5.70 5,888 4.69 0.0013
2020-08-14 2020-06-30 13F KOPPERS HOLDINGS COM 50060P106 298,586 17,321 6.16 5,624 61.70 0.0013
2020-05-14 2020-03-31 13F KOPPERS HOLDINGS COM 50060P106 281,265 2,354 0.84 3,478 -67.37 0.0010
2020-02-14 2019-12-31 13F KOPPERS HOLDINGS COM 50060P106 278,911 -10,595 -3.66 10,660 26.06 0.0024
2019-11-13 2019-09-30 13F KOPPERS HOLDINGS COM 50060P106 289,506 -5,161 -1.75 8,456 -2.25 0.0020
2019-08-13 2019-06-30 13F KOPPERS HOLDINGS COM 50060P106 294,667 1,293 0.44 8,651 13.49 0.0021
2019-05-13 2019-03-31 13F KOPPERS HOLDINGS COM 50060P106 293,374 -5,418 -1.81 7,623 49.71 0.0019
2019-02-12 2018-12-31 13F KOPPERS HOLDINGS COM 50060P106 298,792 -15,064 -4.80 5,092 -47.92 0.0014
2018-11-14 2018-09-30 13F KOPPERS HOLDINGS COM 50060P106 313,856 -189 -0.06 9,777 -18.82 0.0024
2018-09-18 2018-06-30 13F/A-1 KOPPERS HOLDINGS COM 50060P106 314,045 3,203 1.03 12,044 -5.72 0.0031
2018-08-14 2018-06-30 13F KOPPERS HOLDINGS COM 50060P106 315,274 4,432 12,091
2018-05-09 2018-03-31 13F KOPPERS HOLDINGS COM 50060P106 310,842 -2,805 -0.89 12,775 -19.98 0.0033
2018-02-14 2017-12-31 13F KOPPERS HOLDINGS COM 50060P106 313,647 -7,613 -2.37 15,964 7.68 0.0040
2017-11-13 2017-09-30 13F KOPPERS HOLDINGS COM 50060P106 321,260 -4,893 -1.50 14,826 25.74 0.0039
2017-08-11 2017-06-30 13F KOPPERS HOLDINGS COM 50060P106 326,153 13,077 4.18 11,791 -11.07 0.0033
2017-05-12 2017-03-31 13F KOPPERS HOLDINGS COM 50060P106 313,076 468 0.15 13,259 5.25 0.0038
2017-02-13 2016-12-31 13F KOPPERS HOLDINGS COM 50060P106 312,608 4,748 1.54 12,598 27.16 0.0039
2016-11-09 2016-09-30 13F KOPPERS HOLDINGS COM 50060P106 307,860 12,519 4.24 9,907 9.17 0.0031
2016-08-12 2016-06-30 13F KOPPERS HOLDINGS COM 50060P106 295,341 -12,465 -4.05 9,075 31.43 0.0029
2016-08-19 2016-03-31 13F/A-1 KOPPERS HOLDINGS COM 50060P106 307,806 19,428 6.74 6,905 31.20 0.0023
2016-05-13 2016-03-31 13F Koppers Holdings COMM 50060P106 307,806 6,916
2016-02-12 2015-12-31 13F Koppers Holdings COMM 50060P106 288,378 15,314 5.61 5,263 -4.45 0.0017
2015-11-12 2015-09-30 13F Koppers Holdings COMM 50060P106 273,064 273,064 0.00 5,508 0.0018
2015-08-13 2015-06-30 13F Koppers Holdings COMM 50060P106 0 -269,149 -100.00 0 -100.00
2015-05-14 2015-03-31 13F Koppers Holdings COMM 50060P106 269,149 -3,836 -1.41 5,296 -25.32 0.0016
2015-02-12 2014-12-31 13F Koppers Holdings COM 50060P106 272,985 -10,213 -3.61 7,092 -24.48 0.0021
2014-11-13 2014-09-30 13F Koppers Holdings COMM 50060P106 283,198 -8,993 -3.08 9,391 -15.97 0.0029
2014-08-14 2014-06-30 13F KOPPERS HOLDINGS com 50060P106 292,191 -58,137 -16.60 11,176 -22.63 0.0035
2014-05-14 2014-03-31 13F KOPPERS HOLDINGS COMM 50060P106 350,328 -2,731 -0.77 14,444 -10.58 0.0045
2014-02-21 2013-12-31 13F/A-1 KOPPERS HOLDINGS COM 50060P106 353,059 -23,375 -6.21 16,153 0.62 0.0052
2014-02-12 2013-12-31 13F KOPPERS HOLDINGS COM 50060P106 353,059 16,153
2013-11-13 2013-09-30 13F KOPPERS HOLDINGS COM 50060P106 376,434 -7,851 -2.04 16,054 9.43 0.0057
2013-08-09 2013-06-30 13F KOPPERS HOLDINGS COM 50060P106 384,285 384,285 14,671 0.0053
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.