IRONWOOD INVESTMENT MANAGEMENT LLC

Position in KOP — Koppers Holdings Inc.

CIK 1127761 BOSTON, MA

Position in KOP

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$2,298,210

+$201,785 QoQ

Shares Held

59,416

-23.3% QoQ

Ownership

0.309%

of shares outstanding

% of Portfolio

1.24%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Basic Materials · as of Mar 31, 2026

IRONWOOD INVESTMENT MANAGEMENT LLC holds $3,857,231 across 3 Specialty Chemicals names. KOP ranks #1 (59.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	KOP	Koppers Holdings Inc. This page	59,416	$2,298,210
2	CBT	Cabot Corp	17,966	$1,353,019
3	AVNT	Avient Corp	5,675	$206,002

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$2,298,210	59,416	-23.3%	Shares	Sole	2026-05-15
2025-12-31	$2,096,425	77,416	-6.1%	Shares	Sole	2026-02-12
2025-09-30	$2,307,648	82,416	0.0%	Shares	Sole	2025-11-13
2025-06-30	$2,649,674	82,416	-4.1%	Shares	Sole	2025-08-13
2025-03-31	$2,405,648	85,916	0.0%	Shares	Sole	2025-05-15
2024-12-31	$2,783,678	85,916	+8.9%	Shares	Sole	2025-02-10
2024-09-30	$2,882,801	78,916	+13.7%	Shares	Sole	2024-11-14
2024-06-30	$2,567,697	69,416	-30.7%	Shares	Sole	2024-08-16
2024-03-31	$5,522,296	100,096	+12.1%	Shares	Sole	2024-05-15
2023-12-31	$4,571,692	89,256	-0.9%	Shares	Sole	2024-02-14
2023-09-30	$3,561,714	90,056	0.0%	Shares	Sole	2023-11-16
2023-06-30	$3,070,909	90,056	-3.2%	Shares	Sole	2023-08-11
2023-03-31	$3,254,168	93,056	-3.1%	Shares	Sole	2023-05-15
2022-12-31	$2,708,779	96,056	-1.0%	Shares	Sole	2023-01-31
2022-09-30	$2,016,823	97,056	0.0%	Shares	Sole	2022-11-14
2022-06-30	$2,197,347	97,056	-1.8%	Shares	Sole	2022-08-12
2022-03-31	$2,720,517	98,856	0.0%	Shares	Sole	2022-05-10
2021-12-31	$3,094,192	98,856	-1.5%	Shares	Sole	2022-02-10
2021-09-30	$3,137,128	100,356	-1.4%	Shares	Sole	2021-11-12
2021-06-30	$3,292,453	101,776	0.0%	Shares	Sole	2021-08-16
2021-03-31	$3,537,733	101,776	+4.6%	Shares	Sole	2021-05-14
2020-12-31	$3,031,120	97,276	-3.0%	Shares	Sole	2021-02-12
2020-09-30	$2,097,189	100,296	+3.1%	Shares	Sole	2020-11-13
2020-06-30	$1,832,679	97,276	+18.7%	Shares	Sole	2020-08-17
2020-03-31	$1,014,043	81,976	—	Shares	Sole	2020-05-14
No filing history on record for this holder in this stock.