Armstrong World Industries Inc

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC AWI

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/9/2026

Shares

121,752

Value ($000)

23,267

Weight

0.1%

2019 Q4 - 2025 Q4 (18 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2025 Q4	2/9/2026	23,267	0.1%	121,752	12/31/2025
2025 Q3	11/12/2025	26,276	0.1%	134,053	9/30/2025
2025 Q2	7/29/2025	23,089	0.1%	142,139	6/30/2025
2025 Q1	5/9/2025	32,700	0.1%	232,113	3/31/2025
2024 Q4	2/10/2025	34,418	0.1%	243,527	12/31/2024
2024 Q3	11/8/2024	35,095	0.1%	267,022	9/30/2024
2024 Q2	8/8/2024	31,139	0.1%	274,983	6/30/2024
2024 Q1	5/8/2024	34,300	0.1%	276,121	3/31/2024
2023 Q4	2/9/2024	43,962	0.1%	447,130	12/31/2023
2023 Q3	11/9/2023	32,912	0.1%	457,111	9/30/2023
2023 Q2	8/11/2023	36,097	0.1%	491,387	6/30/2023
2023 Q1	5/12/2023	34,348	0.1%	482,145	3/31/2023
2022 Q4	2/9/2023	28,687	0.1%	418,244	12/31/2022
2022 Q3	11/9/2022	34,403	0.1%	434,217	9/30/2022
2022 Q2	8/10/2022	33,129	0.1%	441,962	6/30/2022
2020 Q2	8/12/2020	11,489	0.0%	147,374	6/30/2020
2020 Q1	5/8/2020	21,646	0.1%	272,547	3/31/2020
2019 Q4	2/12/2020	18,874	0.1%	200,853	12/31/2019