Position in CLH
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$41,390,909
+$13,987,232 QoQ
Shares Held
144,355
+23.5% QoQ
Ownership
0.273%
of shares outstanding
% of Portfolio
1.22%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2020
22 quarters on record
Voting authority
Sole 95.2547539053029.ToString("F0")%
Shared 0.ToString("F0")%
None 4.745246094697101.ToString("F0")%
Common Shares in CLH Over Time
Shares Held
Position Value (USD)
Position in Waste Management
Industrials · as of Mar 31, 2026OBERWEIS ASSET MANAGEMENT INC/ holds $41,390,909 across 1 Waste Management name. CLH ranks #1 (100.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | CLH |
Clean Harbors Inc
This page
|
144,355 | $41,390,909 |
All Filings in CLH
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22 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $41,390,909 | 144,355 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $27,403,677 | 116,870 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $27,116,329 | 116,770 | Shares | Sole | 2025-11-17 | |
| 2025-06-30 | $27,117,414 | 117,300 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $21,744,072 | 110,320 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $23,573,240 | 102,430 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $25,468,982 | 105,370 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $23,348,856 | 103,245 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $16,365,496 | 81,295 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $9,956,668 | 57,055 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $7,600,654 | 45,415 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $7,416,615 | 45,105 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $7,247,037 | 50,835 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $5,515,990 | 48,335 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $2,493,796 | 22,675 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $1,042,396 | 11,890 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $547,036 | 4,900 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $289,333 | 2,900 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $301,223 | 2,900 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $335,304 | 3,600 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $302,616 | 3,600 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $304,400 | 4,000 | Shares | Sole | 2021-02-16 | |
| No filing history on record for this holder in this stock. | ||||||