WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Position in LPX — Louisiana-Pacific Corp

CIK 1644956 CHICAGO, IL

Position in LPX

as of Mar 31, 2026 · filed May 8, 2026 Compact

Position Value

$43,366,857

-$23,618,636 QoQ

Shares Held

596,108

-28.1% QoQ

Ownership

0.853%

of shares outstanding

% of Portfolio

0.14%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2024

8 quarters on record

Voting authority Sole 98.56301207163803.ToString("F0")% Shared 0.ToString("F0")% None 1.4369879283619746.ToString("F0")%

Industrials · as of Mar 31, 2026

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $182,215,227 across 5 Building Products & Equipment names. LPX ranks #2 (23.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	WMS	Advanced Drainage Systems, Inc.	655,684	$89,913,946
2	LPX	Louisiana-Pacific Corp This page	596,108	$43,366,857
3	TREX	Trex Co Inc	647,178	$23,570,222
4	JBI	Janus International Group, Inc.	2,729,756	$14,058,243
5	OC	Owens Corning	104,472	$11,305,959

8 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$43,366,857	596,108	-28.1%	Shares	Sole	2026-05-08
2025-12-31	$66,985,493	829,439	-10.5%	Shares	Sole	2026-02-09
2025-09-30	$82,303,774	926,427	-5.1%	Shares	Sole	2025-11-12
2025-06-30	$83,956,164	976,348	-1.3%	Shares	Sole	2025-07-29
2025-03-31	$91,010,714	989,462	-6.7%	Shares	Sole	2025-05-09
2024-12-31	$109,841,905	1,060,762	-2.5%	Shares	Sole	2025-02-10
2024-09-30	$116,966,448	1,088,465	-1.6%	Shares	Sole	2024-11-08
2024-06-30	$91,052,698	1,105,948	—	Shares	Sole	2024-08-08
No filing history on record for this holder in this stock.