ACK Asset Management LLC
Position in WMS — Advanced Drainage Systems, Inc.
CIK 1510940
GREENWICH, CT
Position in WMS
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$61,214,400
+$7,733,700 QoQ
Shares Held
390,000
0.0% QoQ
Ownership
0.517%
of shares outstanding
% of Portfolio
7.39%
of 13F equity value
Holder Rank
#41
of 543 holders
Holding Since
Mar 2020
6 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in WMS Over Time
Shares Held
Position Value (USD)
Position in Building Products & Equipment
Industrials · as of Jun 30, 2026ACK Asset Management LLC holds $97,834,600 across 2 Building Products & Equipment names. WMS ranks #1 (62.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | WMS |
Advanced Drainage Systems, Inc.
This page
|
390,000 | $61,214,400 | |
| 2 | SWIM |
Latham Group, Inc.
|
5,660,000 | $36,620,200 |
All Filings in WMS
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6 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $61,214,400 | 390,000 | Shares | Sole | 2026-08-13 | |
| 2026-03-31 | $53,480,700 | 390,000 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $56,483,700 | 390,000 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $54,093,000 | 390,000 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $39,626,700 | 345,000 | Shares | Sole | 2025-08-13 | |
| 2020-03-31 | $8,434,560 | 286,500 | Shares | Sole | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||