Senseonics Holdings, Inc.
Ownership
Ownership Structure
Who owns Senseonics Holdings, Inc. (SENS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 83.8% of the shares are freely tradable; institutional investors hold 23.7%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Sessa Capital, L.P | 3.34 | 1,766,093 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.06 | 1,617,197 | +0.0 | 03/31/2026 |
| Avidity Partners Management LP | 3.03 | 1,600,000 | +0.0 | 06/30/2026 |
| Sio Capital Management, LLC | 3.01 | 1,592,692 | +1,275.6 | 06/30/2026 |
| Masters Capital Management LLC | 1.32 | 700,000 | +40.0 | 06/30/2026 |
| BlackRock Inc | 1.08 | 568,729 | -4.4 | 03/31/2026 |
| Geode Capital Management, LLC | 0.88 | 466,515 | -0.4 | 03/31/2026 |
| Marshall Wace Asset Management Ltd | 0.88 | 464,375 | +197.9 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.22 | 1,175,190 | +0.0 | 08/31/2026 |
| iShares Russell 2000 ETF | 1.81 | 958,202 | -0.6 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Roeder Douglas A | Director | 171,191 | 1,677,675 $ | Aug 19, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 19, 2026 | Roeder Douglas A | Director | Buy | 13,953 | 8.98 | 125,298 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 28, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.