| Carrier | Rate Change | Policyholders | Eff. Date | Filing # |
|---|---|---|---|---|
| Plymouth Rock | +3.0% | 12K | 9/1/26 | PRAC-134967675 → |
| Nationwide | −10.0% | 10K | 1/31/26 | NWPP-G134710868 → |
| Selective | +8.6% | 11K | 12/31/25 | SELC-134573770 → |
| Hanover | +5.8% | 11K | 3/13/26 | HNVR-G134656976 → |
| Grange | +9.9% | 8K | 6/1/26 | GRAN-134679118 → |
| American National | +5.2% | 7K | 12/26/25 | ANPC-134643362 → |
If your Plymouth Rock renewal in Pennsylvania came in higher, this is the source: Plymouth Rock filed for a rate increase (SERFF PRAC-134967675) and it was approved at +3.0% on about 11,599 policyholders, effective September 1, 2026. The figures below are approved filings pulled from the public SERFF system — not estimates — and every one links to its filing.
Plymouth Rock asked for more than it got.
The filing shows an indicated need of +18.8% — the increase Plymouth Rock’s own actuarial analysis said it required — against the +3.0% it actually took. That gap matters for what comes next: a carrier that took less than it indicated has an unclosed gap, and the remainder often arrives in a later filing rather than disappearing.
Other Pennsylvania insurers are cutting.
An increase is only worth acting on relative to the alternatives, and in Pennsylvania the direction is not uniform: Nationwide (−10.0%) filed decreases in the same period. A Plymouth Rock increase alongside competitor cuts is the clearest signal there is that the market has moved and your renewal has not.
See every approved Pennsylvania auto rate filing →