Koppers (NYSE: KOP) CEO M. Leroy Ball sells 2,659 common shares

Rhea-AI Filing Summary

Koppers Holdings Inc. CEO and director M. Leroy Ball reported an open-market sale of 2,659 shares of common stock at $42.55 per share. After this transaction, he directly holds about 444,096.4007 shares. This total includes 496 shares acquired through the company’s Employee Stock Purchase Plan on March 31, 2026.

Insider Trade Summary

Net Seller: 2,659 shares ($113,140)

Net Sell 1 txn

Insider BALL M LEROY

Role CEO

Sold 2,659 shs ($113K)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,659	$42.55	$113K

Holdings After Transaction: Common Stock — 444,096.401 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 2,659 shares Sale price: $42.55/share Shares held after transaction: 444,096.4007 shares +1 more

4 metrics

Shares sold 2,659 shares Open-market sale of common stock

Sale price $42.55/share Price per share for the reported sale

Shares held after transaction 444,096.4007 shares Direct holdings post-transaction

ESPP shares included 496 shares Acquired via Employee Stock Purchase Plan on March 31, 2026

Key Terms

Form 4, open-market sale, Employee Stock Purchase Plan, Rule 16b-3(c), +1 more

5 terms

Form 4 regulatory

"according to the Form 4 filing"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

open-market sale financial

"reported an open-market sale of 2,659 shares of common stock"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Employee Stock Purchase Plan financial

"acquired through the company’s Employee Stock Purchase Plan on March 31, 2026"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

Rule 16b-3(c) regulatory

"These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d)."

An SEC rule that lets corporate insiders avoid automatic "short‑swing" profit recovery when they buy or sell their company’s stock under a pre‑approved, written plan that meets specific conditions. For investors, it matters because it clarifies when insider trades are treated as routine, reducing legal uncertainty and helping distinguish trades made for ordinary compensation or pre‑planned reasons from those that might signal opportunistic or timely insider advantage.

Rule 16b-3(d) regulatory

"These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d)."

Rule 16b-3(d) is a narrow SEC safe-harbor that shields company insiders (officers, directors and large shareholders) from liability for short‑swing profits when their buys or sells of company stock are made under a pre-established, written plan or contract that removes the insider’s ability to time trades. For investors, this matters because it permits predictable, automated insider transactions — like scheduled sales for diversification or payroll withholding — without triggering forced disgorgement, so such planned trades are treated differently from opportunistic insider trading.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BALL M LEROY

(Last) (First) (Middle)

436 SEVENTH AVENUE

(Street)

PITTSBURGH PENNSYLVANIA 15219

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Koppers Holdings Inc. [ KOP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/13/2026		S		2,659	D	$42.55	444,096.4007(1)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Includes 496 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. Employee Stock Purchase Plan on March 31, 2026. These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d).

Remarks:

	/s/ Stephanie L. Apostolou, Attorney in Fact	05/14/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Koppers (KOP) CEO M. Leroy Ball report?

Koppers CEO M. Leroy Ball reported selling 2,659 shares of common stock in an open-market transaction. The shares were sold at a price of $42.55 per share, according to the Form 4 filing.

At what price did the Koppers (KOP) CEO sell his shares?

The Koppers CEO sold 2,659 shares at $42.55 per share. This price reflects the execution level for the reported open-market sale disclosed in the Form 4 insider trading report.

How many Koppers (KOP) shares does the CEO hold after this sale?

After the sale, the CEO directly holds about 444,096.4007 Koppers common shares. This figure includes 496 shares acquired through the Employee Stock Purchase Plan and reported as part of his total direct ownership.

Was the Koppers (KOP) CEO’s transaction a purchase or sale?

The transaction was a sale of Koppers common stock. The Form 4 shows a transaction code “S,” which indicates an open-market or private sale of 2,659 shares at $42.55 per share.

What does the footnote about the Koppers (KOP) Employee Stock Purchase Plan mean?

The footnote explains that 496 of the CEO’s shares were acquired under the Koppers Employee Stock Purchase Plan on March 31, 2026. These acquisitions were exempt under SEC Rules 16b-3(c) and 16b-3(d).

Does this Koppers (KOP) Form 4 involve any stock options or derivatives?

This Form 4 only reports a non-derivative transaction in common stock. The derivative summary is empty, indicating no option exercises, warrant conversions, or other derivative transactions in this specific filing.