MA Enrollment Explorer / Parent organizations / General Catalyst Group Management Holdings LP
General Catalyst Group Management Holdings LP: Medicare Advantage enrollment and market share
General Catalyst Group Management Holdings LP had 34,554 Medicare Advantage members in October 2026, #71 nationally with 0.10% of all MA enrollment. It gained 8,034 members (+30.3%) since October 2025, and has enrollment in 1 state and 26 counties with 11 or more members. In the 2026 Annual Election Period (December to February) it gained 7,926 members (+29.6%). For 2027, 3,370 of its members are in plans that terminate and 0 in plans leaving their county.
35KMA members, October 2026
+30.3%change since October 2025 (+8,034)
0.10%national MA share, rank 71
1contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| Ohio | 34,503 | 2.3% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Summit County, OH | 13,580 | +1,761 | 16.7% |
| Stark County, OH | 5,513 | +1,485 | 8.5% |
| Medina County, OH | 2,550 | +475 | 10.1% |
| Portage County, OH | 2,494 | +317 | 10.4% |
| Cuyahoga County, OH | 2,405 | +723 | 1.5% |
| Wayne County, OH | 1,872 | +360 | 12.6% |
| Mahoning County, OH | 967 | +437 | 2.4% |
| Lorain County, OH | 871 | +275 | 1.9% |
| Trumbull County, OH | 646 | +311 | 1.9% |
| Ashtabula County, OH | 642 | +511 | 4.6% |
| Tuscarawas County, OH | 474 | +367 | 3.3% |
| Lake County, OH | 430 | +158 | 1.3% |
| Columbiana County, OH | 401 | +203 | 2.4% |
| Carroll County, OH | 358 | +207 | 7.8% |
| Geauga County, OH | 266 | +73 | 2.2% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H3660 SummaCare Medicare Advantage Plans | HMO/HMOPOS | 23,054 | 26,520 | 34,554 |
Star ratings for these contracts are in the MA Quality Dashboard.