Skip to content

Senneca Holdings

Private company

WARN notices since 2024

0
None on record

Workers affected since 2024

0
Across 0 notices

Executive changes, last 12 months

0
0 appointments, 0 departures

Last event

May 6, 2021
Plant closurePlant closure: Fontana, CA

Workers affected over time

Cumulative workers in WARN notices since 2024

Not enough notices to chart yet.

Leadership

No executive changes on record.

  1. layoffs from Dec 31, 2021

    Plant closure

    Plant closure: Fontana, CA

    Senneca Holdings/Simplex Isolation Systems filed a WARN notice with the California WARN list on May 6, 2021 covering 23 workers in Fontana. The site closes on Dec 31, 2021.

    Site: Fontana, CA

    Workers affected: 23

    Source: California WARN list, filed May 6, 2021

  2. WARN notice

    WARN notice: Gloucester City, NJ

    Senneca / Thermoseal filed a WARN notice with the New Jersey WARN list covering 47 workers in Gloucester City. The layoffs take effect on Jun 30, 2020.

    Site: Gloucester City, NJ

    Workers affected: 47

    Source: New Jersey WARN list, filed Jun 30, 2020

Last verified Nov 8, 2026