Security key
00790R104
ADVANCED DRAINAGE SYSTEMS, INC. - Common Stock (WMS)
CUSIP: 00790R104
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 4,386,060
- Total 13F value
- $687,705,992
- Share change
- -1,349,968
- SEC-reported price per share
- $156.96
- Number of holders
- 173
- Value change
- -$200,971,792
- Number of buys
- 68
- Number of sells
- 80
- Shares outstanding
- 78,022,980
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
173
Top holders
10
WMS full security history
Ownership snapshot
Full 13F holder table
ADVANCED DRAINAGE SYSTEMS, INC. SEC filings
ADVANCED DRAINAGE SYSTEMS, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 00790R104
Recent filing periods:
Ownership snapshot
Top reported holders of WMS - ADVANCED DRAINAGE SYSTEMS, INC. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
31 Mar 2026
13F
13D/G
3/4/5
Lead comparable stake: 8.9%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 8.9%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
8.9%
DELAWARE CHARTER GUARANTEE & TRUS...
6%
VANGUARD CAPITAL MANAGEMENT LLC
5.1%
Mark Haney
0.01%
Luther C. Kissam IV
0%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
8.9%
from 13D/G
|
$1,017,878,779
7,422,729 shares
|
— | 31 Mar 2026 |
| DELAWARE CHARTER GUARANTEE & TRUST CO |
13D/G
Advanced Drainage Systems Inc. Employee Stock Ownership Plan Trust
|
6%
|
$701,834,983
4,629,213 shares
|
$0 | 31 Dec 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.1%
|
$545,663,856
3,979,172 shares
|
$0 | 31 Mar 2026 |
| Mark Haney |
3/4/5
Director
|
0.01%
|
$941,392
8,196 shares
|
— | 17 Jul 2025 |
| Luther C. Kissam IV |
3/4/5
Director
|
0%
|
$226,503
1,972 shares
|
— | 17 Jul 2025 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
Company
|
4.6%
|
$495,819,158
3,615,687 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
173
Shares
4,386,060
Rows available
173
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
575
Q2 2026 holders
173
Holder diff
-402
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend