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OBERWEIS ASSET MANAGEMENT INC/

Position in CLH — Clean Harbors Inc

CIK 937886 LISLE, IL

Position in CLH

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$45,850,656
+$4,459,747 QoQ
Shares Held
153,475
+6.3% QoQ
Ownership
0.290%
of shares outstanding
% of Portfolio
0.95%
of 13F equity value
Holder Rank
#52
of 660 holders
Holding Since
Dec 2020
23 quarters on record
Voting authority Sole 95% Shared 0% None 5%

Common Shares in CLH Over Time

Shares Held

Position Value (USD)

Position in Waste Management

Industrials · as of Jun 30, 2026

OBERWEIS ASSET MANAGEMENT INC/ holds $45,850,656 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
153,475 $45,850,656

All Filings in CLH

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23 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $45,850,656 153,475
2026-03-31 $41,390,909 144,355
2025-12-31 $27,403,677 116,870
2025-09-30 $27,116,329 116,770
2025-06-30 $27,117,414 117,300
2025-03-31 $21,744,072 110,320
2024-12-31 $23,573,240 102,430
2024-09-30 $25,468,982 105,370
2024-06-30 $23,348,856 103,245
2024-03-31 $16,365,496 81,295
2023-12-31 $9,956,668 57,055
2023-09-30 $7,600,654 45,415
2023-06-30 $7,416,615 45,105
2023-03-31 $7,247,037 50,835
2022-12-31 $5,515,990 48,335
2022-09-30 $2,493,796 22,675
2022-06-30 $1,042,396 11,890
2022-03-31 $547,036 4,900
2021-12-31 $289,333 2,900
2021-09-30 $301,223 2,900
2021-06-30 $335,304 3,600
2021-03-31 $302,616 3,600
2020-12-31 $304,400 4,000