Comparable stake leader
BlackRock, Inc.
SEC ownership of ADVANCED DRAINAGE SYSTEMS, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001604028.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
16 Jul 2026
- Public ticker
- WMS on NYSE
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
16 Jul 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001604028
- Issuer location
- Hilliard, OH
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of ADVANCED DRAINAGE SYSTEMS, INC. (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
50/50
Latest evidence
16 Jul 2026
13F
13D/G
3/4/5
Lead comparable stake: 8.9%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 8.9%.
50 of 50 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%
Robert M. Eversole
0.07%
Tanya D. Fratto
0.04%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
8.9%
from 13D/G
|
$1,172,481,738
7,469,940 shares
|
— | 30 Jun 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 |
| Robert M. Eversole |
3/4/5
Director
|
0.07%
|
$8,431,105
53,715 shares
|
-$1,615,155 | 16 Jul 2026 |
| Tanya D. Fratto |
3/4/5
Director
|
0.04%
|
$4,795,441
30,552 shares
|
— | 16 Jul 2026 |
| Manuel J. Perez de la Mesa |
3/4/5
Director
|
0.03%
|
$3,934,987
25,070 shares
|
— | 16 Jul 2026 |
| Alexander R. Fischer |
3/4/5
Director
|
0.02%
|
$2,756,845
17,564 shares
|
— | 16 Jul 2026 |
| Anil Seetharam |
3/4/5
Director
|
0.02%
|
$2,736,754
17,436 shares
|
— | 16 Jul 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.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$14,837,984.
Buys
$0
Insiders: 0
Sells
$14,837,984
Insiders: 4
Net
-$14,837,984
Shares: -99,272
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 99,272
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 12,069 | $0 | $1,847,655 | -$1,847,655 |
| 9-12 | 0 | 87,203 | $0 | $12,990,329 | -$12,990,329 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 28 reporting-owner rows connected to ADVANCED DRAINAGE SYSTEMS, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
28
Largest Forms 3/4/5 holder
Berkshire Partners Holdings LLC
Net 12M change
-$14,837,984
Latest report
16 Jul 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Berkshire Partners Holdings LLC | 10%+ Owner | $905,667,057 | Mixed | 14 Dec 2021 | ||
| D. Scott Barbour | President & Chief Executive Officer, Director | $53,731,565 | -$11,920,363 | -18% | Mixed | 12 Jun 2026 |
| Roy E. Moore Jr. | Executive Vice President | $18,871,127 | Mixed | 18 May 2023 | ||
| Robert M. Klein | EVP, Sales | $17,959,237 | Filing P/S | 24 May 2024 | ||
| Scott A. Cottrill | Evp, Cfo And Secretary | $17,549,901 | Mixed | 26 May 2026 | ||
| Kevin C. Talley | EVP and CAO | $11,669,392 | Mixed | 26 May 2026 | ||
| Ross M. Jones | Director | $11,532,087 | Mixed | 28 Feb 2024 | ||
| Robert M. Eversole | Director | $8,431,105 | -$1,615,155 | -16% | Median | 16 Jul 2026 |
| Michael G. Huebert | Executive Vice President | $6,216,457 | Mixed | 31 May 2024 | ||
| Ronald R. Vitarelli | Evp | $5,859,097 | Mixed | 22 May 2021 | ||
| C. Robert Kidder | Director | $5,448,620 | Mixed | 22 Jul 2021 | ||
| Tanya D. Fratto | Director | $4,795,441 | Median | 16 Jul 2026 | ||
| Carl A. Nelson Jr. | Director | $4,300,719 | Mixed | 20 Jul 2023 | ||
| Manuel J. Perez de la Mesa | Director | $3,934,987 | Median | 16 Jul 2026 | ||
| Tim A. Makowski | Vice President, Controller and Chief Accounting Officer | $3,329,360 | -$731,276 | -18% | Mixed | 26 May 2026 |
| Brian W. King | Executive Vice President | $3,217,642 | Mixed | 26 May 2026 | ||
| Alexander R. Fischer | Director | $2,756,845 | Median | 16 Jul 2026 | ||
| Anil Seetharam | Director | $2,736,754 | Median | 16 Jul 2026 | ||
| Thomas J. Waun Sr. | EVP, International | $2,525,930 | -$571,190 | -18% | Mixed | 26 Nov 2025 |
| Darin S. Harvey | EVP, Supply Chain & Logistics | $2,103,207 | Mixed | 09 Jun 2025 |
Recent insider transactions for ADVANCED DRAINAGE SYSTEMS, INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Tanya D. Fratto | WMS | Common Stock | Award | 3.77% | 1,110 | 30,552 | 16 Jul 2026 | Direct | ||
| Kelly S. Gast | WMS | Common Stock | Award | 14.1% | 1,110 | 8,981 | 16 Jul 2026 | Direct | ||
| Michael B. Coleman | WMS | Common Stock | Award | 9.67% | 1,110 | 12,587 | 16 Jul 2026 | Direct | ||
| Anil Seetharam | WMS | Common Stock | Award | 12.3% | 1,782 | 16,240 | 16 Jul 2026 | Direct | ||
| Anesa Chaibi | WMS | Common Stock | Award | 14.6% | 1,110 | 8,698 | 16 Jul 2026 | Direct | ||
| Manuel J. Perez de la Mesa | WMS | Common Stock | Award | 7.65% | 1,782 | 25,070 | 16 Jul 2026 | Direct | ||
| Robert M. Eversole | WMS | Common Stock | Award | 94.4% | 2,253 | 4,639 | 16 Jul 2026 | Direct | ||
| Alexander R. Fischer | WMS | Common Stock | Award | 6.75% | 1,110 | 17,564 | 16 Jul 2026 | Direct | ||
| D. Scott Barbour | WMS | Common Stock | Other | 0.96% | 511 | 53,652 | 12 Jun 2026 | Reporting Person's Revocable Trust | ||
| D. Scott Barbour | WMS | Common Stock | Other | -100% | -511 | 0 | 12 Jun 2026 | 2023 GRAT Remainder Trust | ||
| Craig J. Taylor | WMS | Common Stock | Award | 11.5% | 1,530 | 14,873 | 26 May 2026 | Direct | ||
| Craig J. Taylor | WMS | Option to Purchase Common Stock | Award | 3,406 | 3,406 | 26 May 2026 | Direct | |||
| Bret Martz | WMS | Common Stock | Award | 68.2% | 1,252 | 3,089 | 26 May 2026 | Direct | ||
| Bret Martz | WMS | Option to Purchase Common Stock | Award | 2,787 | 2,787 | 26 May 2026 | Direct | |||
| Kevin C. Talley | WMS | Common Stock | Award | 1.96% | 1,217 | 63,453 | 26 May 2026 | Direct | ||
| Kevin C. Talley | WMS | Option to Purchase Common Stock | Award | 2,709 | 2,709 | 26 May 2026 | Direct | |||
| Scott A. Cottrill | WMS | Common Stock | Award | 2.32% | 2,503 | 110,511 | 26 May 2026 | Direct | ||
| Scott A. Cottrill | WMS | Option to Purchase Common Stok | Award | 5,573 | 5,573 | 26 May 2026 | Direct | |||
| D. Scott Barbour | WMS | Common Stock | Award | 13.2% | 9,036 | 77,268 | 26 May 2026 | Direct | ||
| D. Scott Barbour | WMS | Option to Purchase Common Stock | Award | 20,124 | 20,124 | 26 May 2026 | Direct | |||
| Patrick M. Coyle Jr. | WMS | Common Stock | Award | 14.2% | 1,252 | 10,065 | 26 May 2026 | Direct | ||
| Patrick M. Coyle Jr. | WMS | Option to Purchase Common Stock | Award | 2,787 | 2,787 | 26 May 2026 | Direct | |||
| Tim A. Makowski | WMS | Common Stock | Award | 14.4% | 847 | 6,722 | 26 May 2026 | Direct | ||
| Tim A. Makowski | WMS | Option to Purchase Common Stock | Award | 1,886 | 1,886 | 26 May 2026 | Direct | |||
| Brian W. King | WMS | Common Stock | Award | 4.58% | 950 | 21,686 | 26 May 2026 | Direct | ||
| Brian W. King | WMS | Option to Purchase Common Stock | Award | 2,115 | 2,115 | 26 May 2026 | Direct | |||
| D. Scott Barbour | WMS | Common Stock | Tax liability | -2.71% | -1,898 | 68,232 | 22 May 2026 | Direct | ||
| Craig J. Taylor | WMS | Common Stock | Tax liability | -1.13% | -152 | 13,343 | 22 May 2026 | Direct | ||
| Kevin C. Talley | WMS | Common Stock | Tax liability | -0.52% | -324 | 62,236 | 22 May 2026 | Direct | ||
| Tim A. Makowski | WMS | Common Stock | Tax liability | -2.15% | -129 | 5,875 | 22 May 2026 | Direct | ||
| Brian W. King | WMS | Common Stock | Tax liability | -1.1% | -230 | 20,736 | 22 May 2026 | Direct | ||
| Thomas J. Waun Sr. | WMS | Common Stock | Tax liability | -1.22% | -218 | 17,590 | 22 May 2026 | Direct | ||
| Patrick M. Coyle Jr. | WMS | Common Stock | Tax liability | -1.25% | -112 | 8,813 | 22 May 2026 | Direct | ||
| Scott A. Cottrill | WMS | Common Stock | Tax liability | -0.56% | -604 | 108,008 | 22 May 2026 | Direct | ||
| Thomas J. Waun Sr. | WMS | Common Stock | Tax liability | -0.75% | -100 | 13,253 | 20 May 2026 | Direct | ||
| Scott A. Cottrill | WMS | Common Stock | Award | 10.2% | 10,075 | 108,612 | 20 May 2026 | Direct | ||
| Scott A. Cottrill | WMS | Common Stock | Tax liability | -0.34% | -339 | 98,537 | 20 May 2026 | Direct | ||
| Tim A. Makowski | WMS | Common Stock | Award | 163.9% | 3,729 | 6,004 | 20 May 2026 | Direct | ||
| Tim A. Makowski | WMS | Common Stock | Tax liability | -3.72% | -88 | 2,275 | 20 May 2026 | Direct | ||
| Patrick M. Coyle Jr. | WMS | Common Stock | Award | 56.8% | 3,233 | 8,925 | 20 May 2026 | Direct | ||
| Patrick M. Coyle Jr. | WMS | Common Stock | Tax liability | -1.11% | -64 | 5,692 | 20 May 2026 | Direct | ||
| Brian W. King | WMS | Common Stock | Award | 27.3% | 4,491 | 20,966 | 20 May 2026 | Direct | ||
| Brian W. King | WMS | Common Stock | Tax liability | -0.61% | -101 | 16,475 | 20 May 2026 | Direct | ||
| D. Scott Barbour | WMS | Common Stock | Award | 71.9% | 29,327 | 70,130 | 20 May 2026 | Direct | ||
| D. Scott Barbour | WMS | Common Stock | Tax liability | -2.69% | -1,130 | 40,803 | 20 May 2026 | Direct | ||
| Craig J. Taylor | WMS | Common Stock | Award | 42.7% | 4,039 | 13,495 | 20 May 2026 | Direct | ||
| Craig J. Taylor | WMS | Common Stock | Tax liability | -1.25% | -120 | 9,456 | 20 May 2026 | Direct | ||
| Kevin C. Talley | WMS | Common Stock | Award | 10.4% | 5,903 | 62,560 | 20 May 2026 | Direct | ||
| Kevin C. Talley | WMS | Common Stock | Tax liability | -0.25% | -141 | 56,657 | 20 May 2026 | Direct | ||
| Thomas J. Waun Sr. | WMS | Common Stock | Award | 34.4% | 4,555 | 17,808 | 19 May 2026 | Direct |
* marks a reported price that did not pass the local price check.