• $62.0M
    Market Cap
  • -8.72%
    1-Year Change
  • Pollution & Treatment Controls
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
GRACE & WHITE INC /NY
4.95%
1.5M
+55,424 (+3.60%)
Mar 31, 2026
RENAISSANCE TECHNOLOGIES LLC
4.52%
1.4M
+259,811 (+18.46%)
Mar 31, 2026
VANGUARD GROUP INC
3.61%
1.1M
+112,139 (+9.96%)
Dec 31, 2025
N/A
3.17%
987,998
+987,998 (+100.00%)
Mar 31, 2026
BLACKROCK INSTITUTIONAL TRUST COMPANY, N.A.
1.72%
535,129
0 (0.00%)
Dec 31, 2016
GEODE CAPITAL MANAGEMENT, LLC
1.71%
532,808
+13,869 (+2.60%)
Mar 31, 2026
PEAPOD LANE CAPITAL LLC
1.54%
478,842
+119,199 (+24.89%)
Mar 31, 2026

Current Ownership Distribution

  • Institutions111.5M (80.93%)
  • Mutual Funds16.1M (11.66%)
  • Insiders10.2M (7.42%)
  • Other0 (0.00%)

Insider Transactions

  • 7.42% (10.2M)
    Current InsiderOwnership (%, shares)
  • 1
    Number of InsiderBuying (last 12 months)
  • $668,996.12
    Amount of InsiderBuying (last 12 months)
  • 0
    Number of InsiderSelling (last 12 months)
  • $0.00
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
ARNONE VINCENT J
President & CEO
Award
Mar 24, 2026
$0.00
20,850
$0.00
20,850
Albrecht Ellen T
Chief Financial Officer
Award
Mar 24, 2026
$0.00
8,350
$0.00
8,350
Cummings William E JR
Senior Vice President, Sales
Award
Mar 24, 2026
$0.00
6,250
$0.00
6,250
ARNONE VINCENT J
President & CEO
Buy
Mar 06, 2026
$12,400.00
10,000
$1.24
549,513
BAILEY DOUGLAS G
Award
Jun 04, 2025
$0.00
15,000
$0.00
15,000
ZEITLER DENNIS L
Award
Jun 04, 2025
$0.00
15,000
$0.00
15,000
Jones Sharon L
Award
Jun 04, 2025
$0.00
15,000
$0.00
15,000
Jones Sharon L
Sell
Jun 04, 2025
$21,042.90
12,627
$1.67
83,973
ARNONE VINCENT J
President & CEO
Buy
Mar 28, 2025
$15,750.00
15,000
$1.05
485,879
Jones Sharon L
Buy
Nov 19, 2024
$8,655.55
8,014
$1.08
96,600
Jones Sharon L
Buy
Nov 14, 2024
$7,488.00
7,200
$1.04
74,585
Jones Sharon L
Buy
Nov 13, 2024
$9,555.00
9,100
$1.05
67,385
Jones Sharon L
Buy
Nov 12, 2024
$9,690.00
9,500
$1.02
58,285
Jones Sharon L
Buy
Aug 12, 2024
$449.40
447
$1.00
45,492