Koppers Holdings Inc.
US ˙ NYSE ˙ US50060P1066

SecurityKOP / Koppers Holdings Inc.
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership5,560 shares
Latest Disclosed Value $ 215,061
Squarepoint Ops LLC reports 88.53% decrease in ownership of KOP / Koppers Holdings Inc.

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 5,560 shares of Koppers Holdings Inc. (US:KOP) valued at $215,061 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 48,470 shares of Koppers Holdings Inc.. This represents a change in shares of -88.53% during the quarter. The current value of the position is $239,580 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)
2026-05-15 2026-03-31 13F KOPPERS HOLDINGS COM 50060P106 5,560 -42,910 -88.53 215 -83.61 0.0003
2026-02-13 2025-12-31 13F KOPPERS HOLDINGS COM 50060P106 48,470 -41,573 -46.17 1,313 -47.96 0.0014
2025-11-14 2025-09-30 13F KOPPERS HOLDINGS COM 50060P106 90,043 25,817 40.20 2,521 22.14 0.0025
2025-08-27 2025-06-30 13F/A-1 KOPPERS HOLDINGS COM 50060P106 64,226 19,916 44.95 2,065 66.45 0.0021
2025-08-14 2025-06-30 13F KOPPERS HOLDINGS COM 50060P106 64,226 19,916 2,065 0.0021
2025-08-27 2025-03-31 13F/A-1 KOPPERS HOLDINGS COM 50060P106 44,310 44,310 1,241 0.0015
2025-05-15 2025-03-31 13F KOPPERS HOLDINGS COM 50060P106 44,310 44,310 1,241 0.0015
2024-11-14 2024-09-30 13F KOPPERS HOLDINGS COM 50060P106 0 -6,312 -100.00 0 -100.00
2024-08-14 2024-06-30 13F KOPPERS HOLDINGS COM 50060P106 6,312 6,312 233 0.0004
2023-11-14 2023-09-30 13F KOPPERS HOLDINGS COM 50060P106 0 -7,286 -100.00 0 -100.00
2023-08-14 2023-06-30 13F KOPPERS HOLDINGS COM 50060P106 7,286 7,286 248 0.0008
2021-11-15 2021-09-30 13F KOPPERS HOLDINGS COM 50060P106 0 -8,108 -100.00 0 -100.00
2021-08-16 2021-06-30 13F KOPPERS HOLDINGS COM 50060P106 8,108 -3,507 -30.19 262 -35.15 0.0010
2021-05-17 2021-03-31 13F KOPPERS HOLDINGS COM 50060P106 11,615 -3,614 -23.73 404 -14.95 0.0024
2021-02-16 2020-12-31 13F KOPPERS HOLDINGS COM 50060P106 15,229 15,229 475 0.0035
2020-08-14 2020-06-30 13F KOPPERS HOLDINGS COM 50060P106 0 -25,692 -100.00 0 -100.00
2020-05-15 2020-03-31 13F KOPPERS HOLDINGS COM 50060P106 25,692 -35,232 -57.83 318 -86.35 0.0081
2020-02-14 2019-12-31 13F KOPPERS HOLDINGS COM 50060P106 60,924 -24,968 -29.07 2,329 -7.17 0.0139
2019-11-14 2019-09-30 13F KOPPERS HOLDINGS COM 50060P106 85,892 48,643 130.59 2,509 129.34 0.0224
2019-08-14 2019-06-30 13F KOPPERS HOLDINGS COM 50060P106 37,249 37,249 1,094 0.0107
2019-05-15 2019-03-31 13F KOPPERS HOLDINGS COM 50060P106 0 -13,153 -100.00 0 -100.00
2019-02-14 2018-12-31 13F KOPPERS HOLDINGS COM 50060P106 13,153 13,153 224 0.0026
2018-02-14 2017-12-31 13F KOPPERS HOLDINGS COM 50060P106 0 -10,934 -100.00 0 -100.00
2017-11-14 2017-09-30 13F KOPPERS HOLDINGS COM 50060P106 10,934 10,934 505 0.0097
2017-08-14 2017-06-30 13F KOPPERS HOLDINGS COM 50060P106 0 -11,118 -100.00 0 -100.00
2017-05-15 2017-03-31 13F KOPPERS HOLDINGS COM 50060P106 11,118 11,118 471 0.0130
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.