Advanced Drainage Systems, Inc. 13F holders
Of the 44 funds followed here, 8 reported a position in Advanced Drainage Systems, Inc. in a 13F for the quarter ended 30 June 2026. The largest: Baillie Gifford, 1.8 million shares worth $288.1 million, 0.3% of its reported book. Sold out: Alyeska.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Baillie Gifford | 1,835,297 | $288.1 million | 0.3% | -212,052 | trimmed | 30 June 2026 | 13F |
| Geode Capital Management | 1,367,443 | $214.7 million | 0.0% | +22,648 | added | 30 June 2026 | 13F |
| Norges Bank | 1,303,735 | $204.6 million | 0.0% | held | 30 June 2026 | 13F | |
| Citadel Advisors | 141,446 | $22.2 million | 0.0% | +33,423 | added | 30 June 2026 | 13F |
| Millennium Management | 133,227 | $20.9 million | 0.0% | -90,668 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 84,718 | $13.3 million | 0.0% | -7,751 | trimmed | 30 June 2026 | 13F |
| Bridgewater Associates | 26,071 | $4.1 million | 0.0% | -47,187 | trimmed | 30 June 2026 | 13F |
| Two Sigma Investments | 4,000 | $627,840 | 0.0% | +187 | added | 30 June 2026 | 13F |
| Alyeska | 0 | $0 | 0.0% | -258,508 | exited | 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 |
|---|---|---|---|---|---|---|---|
| 29 April 2026 | 13G | Vanguard Capital Management and 1 other | 4.0 million | 5.1% | 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 |
| 13 February 2026 | 13G | Advanced Drainage Systems Inc. Employee Stock Ownership Plan Trust and 1 other | 4.6 million | 6.0% | 31 December 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 |
|---|---|---|---|
| 14 September 2026 | 11,273 | $127.88 | SEC |
| 11 September 2026 | 13,006 | $127.16 | SEC |
| 1 September 2026 | 3 | $135.73 | SEC |
| 31 August 2026 | 2 | $136.99 | SEC |
| 17 August 2026 | 206 | $150.91 | SEC |
| 6 August 2026 | 12,308 | $149.59 | 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: 13,006 on 11 September 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 WMS 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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