Armstrong World Industries Inc. 13F holders
Of the 44 funds followed here, 10 reported a position in Armstrong World Industries Inc. in a 13F for the quarter ended 30 June 2026. The largest: Citadel Advisors, 1.0 million shares worth $167.7 million, 0.0% of its reported book.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Citadel Advisors | 1,045,421 | $167.7 million | 0.0% | +241,540 | added | 30 June 2026 | 13F |
| Geode Capital Management | 1,043,316 | $167.4 million | 0.0% | +34,984 | added | 30 June 2026 | 13F |
| Two Sigma Investments | 583,201 | $93.6 million | 0.1% | -200,562 | trimmed | 30 June 2026 | 13F |
| Norges Bank | 562,406 | $90.2 million | 0.0% | held | 30 June 2026 | 13F | |
| Alyeska | 494,820 | $79.4 million | 0.2% | -246,173 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 460,793 | $73.9 million | 0.0% | -322 | held | 30 June 2026 | 13F |
| Millennium Management | 400,980 | $64.3 million | 0.0% | +52,601 | added | 30 June 2026 | 13F |
| Point72 Asset Management | 370,562 | $59.4 million | 0.1% | +165,083 | added | 30 June 2026 | 13F |
| Renaissance Technologies | 101,400 | $16.3 million | 0.0% | -17,300 | trimmed | 30 June 2026 | 13F |
| Bridgewater Associates | 25,290 | $4.1 million | 0.0% | -5,467 | trimmed | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 14 May 2026 | 13G/A | Capital International Investors and 1 other | 782,112 | 1.8% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Capital Management and 1 other | 2.2 million | 5.2% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 28 April 2026 | 13G | Vanguard Portfolio Management and 1 other | 2.2 million | 5.2% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 14 November 2025 | 13G/A | The London Company and 1 other | 2.1 million | 4.9% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short.Fails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 31 August 2026 | 484 | $175.09 | SEC |
| 12 August 2026 | 4 | $186.70 | SEC |
| 11 August 2026 | 47 | $183.35 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.
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Largest in the window: 484 on 31 August 2026. A fail is an operational fact about settlement, not a position.Source
Each fund's 13F-HR on EDGAR, linked per row; positions matched to AWI by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.
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