ONT · NYSE · Waste Management

Onterris (ONT)

Environmental consulting, testing and contaminant-treatment services.

$16.24
vs last close−0.70 (−4.13%)

13F · 13D/G · Form 4

Strategic holders5.14%1.86M shares
1 holder · as of Nov 14, 2025
Other94.86%34.28M shares
remainder

36.14M company shares as of Sep 23, 2026 · holders as of their latest filing

13F · 13D/G · Form 4

HolderStakeSharesDate
Bamco Inc /NY/Strategic
5.14%1.86Mfiled Nov 14, 2025
Goldman Sachs Asset Management, L.P.Institution
5.05%1.83Mfiled May 11, 2026

13F

No 13F holders on record.

13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
Bamco Inc /NY/5.27%1.86M13GNov 14, 2025
Goldman Sachs Asset Management, L.P.5.00%1.83M13GMay 11, 2026

Form 4

Latest trades

Nothing filed in the last 12 months.

House and Senate disclosures

Not reported.