Advanced Drainage Systems, Inc. (WMS) has 20 known insider and institutional holders on record. The largest holder is CHLAPATY JOSEPH A with 5,784,025 shares. Other notable holders include JONES ROSS M and MOORE ROY E. JR..
Over the last 12 months, insiders have made 58 transactions in WMS stock — 20 buys (valued at $5.09M) and 6 sells (valued at $2.72M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
WMS Insider Ownership
Top Holder
CHLAPATY JOSEPH A
5,784,025 shares
Buys (12 mo)
20
$5.09M value
Sells (12 mo)
6
$2.72M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Chlapaty Joseph A |
10 Percent Owner |
5,784,025 |
2019-11-14 |
|
| 2 |
Jones Ross M |
Director |
772,895 |
2023-09-14 |
|
| 3 |
Moore Roy E. Jr. |
Executive Vice President |
134,660 |
2023-05-23 |
|
| 4 |
Klein Robert M |
EVP, Sales |
102,070 |
2024-05-24 |
|
| 5 |
Cottrill Scott A |
EVP, CFO and Secretary |
99,153 |
2025-05-23 |
|
| 6 |
Berkshire Partners Holdings Llc |
10 Percent Owner |
62,107 |
2021-12-16 |
|
| 7 |
Talley Kevin C |
EVP and CAO |
56,939 |
2025-05-23 |
|
| 8 |
Barbour D. Scott |
See Remarks |
53,141 |
2026-03-17 |
|
| 9 |
Eversole Robert M |
Director |
50,076 |
2025-12-05 |
|
| 10 |
Leeuwenburg Ewout |
SVP, International |
43,341 |
2020-05-27 |
|
| 11 |
Vitarelli Ronald R |
EVP |
42,195 |
2021-05-25 |
|
| 12 |
Kidder C Robert |
Director |
34,680 |
2021-07-26 |
|
| 13 |
Nelson Carl A Jr |
Director |
30,531 |
2023-07-24 |
|
| 14 |
Fratto Tanya D |
Director |
29,442 |
2025-07-21 |
|
| 15 |
Perez De La Mesa Manuel J |
Director |
23,288 |
2025-07-21 |
|
| 16 |
King Brian W. |
Executive Vice President |
16,692 |
2025-05-23 |
|
| 17 |
Fischer Alexander R |
Director |
16,454 |
2025-07-21 |
|
| 18 |
Seetharam Anil |
Director |
14,458 |
2025-07-21 |
|
| 19 |
Waun Thomas J. Sr. |
EVP, International |
13,470 |
2025-12-01 |
|
| 20 |
Coleman Michael B. |
Director |
11,477 |
2025-12-04 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-17 |
Martz Bret |
See Remarks |
Other (Sell) |
107 |
$139.85 |
$14.96K |
| 2026-03-13 |
Barbour D. Scott |
See Remarks |
Gift (Given) |
7,150 |
- |
- |
| 2026-03-04 |
Barbour D. Scott |
See Remarks |
Gift (Given) |
511 |
- |
- |
| 2025-12-05 |
Eversole Robert M |
Director |
Gift (Given) |
1,000 |
- |
- |
| 2025-12-03 |
Eversole Robert M |
Director |
Informative Sell |
10,569 |
$152.82 |
$1.62M |
| 2025-12-02 |
Coleman Michael B. |
Director |
Gift (Given) |
68 |
- |
- |
| 2025-11-26 |
Waun Thomas J. Sr. |
EVP, International |
Informative Sell |
1,500 |
$155.00 |
$232.5K |
| 2025-11-25 |
Barbour D. Scott |
See Remarks |
Gift (Given) |
14,500 |
- |
- |
| 2025-11-05 |
Coyle Patrick M. Jr |
See Remarks |
Unknown |
1,946 |
$119.30 |
$232.16K |
| 2025-11-12 |
Waun Thomas J. Sr. |
EVP, International |
Informative Sell |
1,000 |
$150.00 |
$150K |
| 2025-11-11 |
Waun Thomas J. Sr. |
EVP, International |
Informative Sell |
1,272 |
$148.30 |
$188.63K |
| 2025-11-12 |
Barbour D. Scott |
See Remarks |
Option Exercise (Sell) |
80,030 |
$25.75 |
$2.06M |
| 2025-11-12 |
Makowski Tim A |
See Remarks |
Informative Sell |
101 |
$149.19 |
$15.07K |
| 2025-11-10 |
Eversole Robert M |
Director |
Gift (Given) |
4,100 |
- |
- |
| 2025-07-17 |
Gast Kelly S. |
Director |
RSU Award |
1,967 |
- |
- |
| 2025-07-17 |
Coleman Michael B. |
Director |
RSU Award |
1,130 |
- |
- |
| 2025-07-17 |
Seetharam Anil |
Director |
RSU Award |
1,967 |
- |
- |
| 2025-07-17 |
Fratto Tanya D |
Director |
RSU Award |
1,130 |
- |
- |
| 2025-07-17 |
Fischer Alexander R |
Director |
RSU Award |
1,130 |
- |
- |
| 2025-07-17 |
Eversole Robert M |
Director |
RSU Award |
2,386 |
- |
- |
| 2025-07-17 |
Haney Mark |
Director |
RSU Award |
1,130 |
- |
- |
| 2025-07-17 |
Chaibi Anesa |
Director |
RSU Award |
1,130 |
- |
- |
| 2025-07-17 |
Kissam Luther C Iv |
Director |
RSU Award |
1,130 |
- |
- |
| 2025-07-17 |
Perez De La Mesa Manuel J |
Director |
RSU Award |
1,967 |
- |
- |
| 2025-06-09 |
Harvey Darin S. |
EVP, Supply Chain & Logistics |
Informative Sell |
4,464 |
$116.39 |
$519.56K |
