RIVN Rivian Automotive, Inc.
Rivian Automotive, Inc. (RIVN) Institutional Ownership
What the institutions did with RIVN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| MassMutual Private Wealth & Trust, FSB | 19.0K | 56.1% |
| CX Institutional | 11.4K | 33.6% |
| EASTERN BANK | 1.4K | 4.2% |
| Versant Capital Management, Inc | 1.4K | 4.1% |
| Hickory Point Bank & Trust | 313 | 0.9% |
| TOMPKINS FINANCIAL CORP | 100 | 0.3% |
| Coastline Trust Co | 100 | 0.3% |
| Planning Strategies Inc. | 91 | 0.3% |
| BURKETT FINANCIAL SERVICES, LLC | 50 | 0.1% |
| Roxbury Financial LLC | 15 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CX Institutional | Increased | 6.6K | 11.4K | +4.8K |
| Hickory Point Bank & Trust | New | 0 | 313 | +313 |
| Versant Capital Management, Inc | Increased | 1.2K | 1.4K | +233 |
| EASTERN BANK | Increased | 1.3K | 1.4K | +106 |
| MassMutual Private Wealth & Trust, FSB | Increased | 19.0K | 19.0K | +36 |
| Planning Strategies Inc. | Increased | 85 | 91 | +6 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.