MA Enrollment Explorer / Parent organizations / SIHO Holding, Inc.
SIHO Holding, Inc.: Medicare Advantage enrollment and market share
SIHO Holding, Inc. had 10,940 Medicare Advantage members in October 2026, #103 nationally with 0.03% of all MA enrollment. It gained 5,950 members (+119.2%) since October 2025, and has enrollment in 1 state and 28 counties with 11 or more members. In the 2026 Annual Election Period (December to February) it gained 5,269 members (+103.0%). For 2027, none of its members are in plans that terminate or leave their county.
11KMA members, October 2026
+119.2%change since October 2025 (+5,950)
0.03%national MA share, rank 103
2contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| Indiana | 10,892 | 1.5% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Vanderburgh County, IN | 2,193 | +858 | 11.3% |
| Vigo County, IN | 1,260 | +902 | 11.3% |
| Jackson County, IN | 1,235 | +544 | 21.0% |
| Marion County, IN | 940 | +497 | 1.0% |
| Bartholomew County, IN | 869 | +458 | 10.8% |
| Warrick County, IN | 681 | +298 | 9.9% |
| Hamilton County, IN | 470 | +270 | 1.7% |
| Jennings County, IN | 454 | +288 | 12.4% |
| Posey County, IN | 432 | +150 | 17.0% |
| Madison County, IN | 379 | +174 | 2.0% |
| Gibson County, IN | 298 | new | 8.9% |
| Johnson County, IN | 277 | +157 | 1.6% |
| Howard County, IN | 193 | +101 | 1.8% |
| Clay County, IN | 179 | +139 | 5.7% |
| Hancock County, IN | 166 | +100 | 1.7% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H9042 MyTruAdvantage | Local PPO | 1,495 | 3,651 | 8,636 |
| H6529 MyTruAdvantage | HMO/HMOPOS | 876 | 1,339 | 2,304 |
Star ratings for these contracts are in the MA Quality Dashboard.