Simcoe Capital Discloses 5.6% Koppers Stake After Selling 330,000 Shares in Three Weeks
KOP sits 63% above its 52-week low of $25.
Summary
Simcoe Capital disclosed a 5.6% beneficial stake in Koppers, but the same filing shows its funds sold 330,000 shares over the past three weeks at roughly $41 to $47 — a large, named seller sitting on a remaining 1.06 million-share block.
Key Events · Ownership and Investor Activity · KOP
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Simcoe Group Reports 5.6% Stake
Simcoe Capital Management and affiliates report beneficial ownership of 1,063,279 Koppers shares, or approximately 5.6% of the 18,911,568 shares outstanding as of July 31, 2026.
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330,000 Shares Sold in Three Weeks
Simcoe Partners sold 330,000 shares from October 1 through October 22, 2026, at prices from $41.0214 to $47.1733, leaving it with 873,494 shares (about 4.6%).
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Cost Basis Roughly $32.7 Million
Aggregate purchase prices disclosed: $24,977,523 for Simcoe Partners' 873,494 shares, $6,544,634 for Simcoe Select's 154,000 shares and $1,213,593 for SDR Partners' 35,785 shares.
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Remaining Block Still an Overhang
The group still holds 1,063,279 shares, so further sales or engagement with management remain live possibilities; the filing does not state any intent to change control.
Analysis · KOP · Manufacturing
A 5.6% holder is now on the register, and it has been a persistent seller: Simcoe Partners unloaded 330,000 shares between October 1 and October 22 at prices from about $41 to $47, roughly $14.6 million of stock. That is real supply hitting the tape just as Koppers is still digesting the $215.8 million Stickney impairment and a GAAP loss reported in August. The disclosure matters because it puts a name and a size on the overhang — and because the group's remaining 1.06 million shares are still a meaningful block that could be sold further or used to push for changes.
How filings like this one have moved
In the 30 days to Oct 22, 2026, 29.3% of the 1526 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.41%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, KOP was trading at $40.75 on NYSE in the Manufacturing sector, with a market capitalization of approximately $770.6M. The 52-week trading range was $25.00 to $53.00. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.