Senseonics Holdings, Inc. (SENS) Ownership
SENS ownership summary
as of October 17, 2026- Institutions
- 39.6% of shares outstanding
- Insiders
- 9.87% of shares outstanding
- Shares outstanding
- 52.9M
- Float
- 43.7M shares available to trade
- Short interest
- 10.43% 5.4M shares short
- Days to cover
- 7.46 short interest up 6.3% vs prior month
- Institutions 39.64%
- Insiders 9.87%
- Other investors 50.49%
SENS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Sessa Capital, L.P | 8.39% | 4.4M | $34.5M | +2.7M (+151.3%) | June 30, 2026 |
| 2 | BlackRock Inc | 5.28% | 2.8M | $21.7M | +2.2M (+391.2%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 3.37% | 1.8M | $13.8M | +162,201 (+10.0%) | June 30, 2026 |
| 4 | Avidity Partners Management LP | 3.03% | 1.6M | $12.4M | +1.6M (0.0%) | June 30, 2026 |
| 5 | Sio Capital Management, LLC | 3.01% | 1.6M | $12.4M | +1.5M (+1,275.6%) | June 30, 2026 |
| 6 | UBS Group AG | 2.81% | 1.5M | $11.6M | +1.0M (+231.8%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.14% | 1.1M | $8.8M | +665,695 (+142.7%) | June 30, 2026 |
| 8 | Masters Capital Management LLC | 1.32% | 700K | $5.4M | +200,000 (+40.0%) | June 30, 2026 |
| 9 | State Street Corp | 0.97% | 511K | $4.0M | +330,836 (+183.5%) | June 30, 2026 |
| 10 | Marshall Wace Asset Management Ltd | 0.77% | 406K | $3.2M | −58,680 (−12.6%) | June 30, 2026 |
| 11 | Bank of America Corp | 0.75% | 394K | $3.1M | +337,501 (+592.5%) | June 30, 2026 |
| 12 | Charles Schwab Investment Management Inc | 0.74% | 393K | $3.1M | +172,034 (+77.8%) | June 30, 2026 |
| 13 | Northern Trust Corp | 0.63% | 332K | $2.6M | +249,989 (+303.8%) | June 30, 2026 |
| 14 | Vanguard Fiduciary Trust Co | 0.63% | 331K | $2.6M | +106,186 (+47.2%) | June 30, 2026 |
| 15 | Walleye Trading Advisors, LLC | 0.61% | 324K | $2.5M | +324,264 (0.0%) | June 30, 2026 |
| 16 | Vanguard Portfolio Management, LLC | 0.52% | 272K | $2.1M | +272,375 (0.0%) | June 30, 2026 |
| 17 | The Goldman Sachs Group Inc | 0.44% | 232K | $1.8M | +85,227 (+58.3%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 0.31% | 165K | $1.3M | +41,041 (+33.1%) | June 30, 2026 |
| 19 | Trexquant Investment LP | 0.26% | 135K | $1.0M | +135,128 (0.0%) | June 30, 2026 |
| 20 | Ghisallo Capital Management LLC | 0.24% | 125K | $971,250 | +125,000 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 19 holders added 12.2M shares and 1 cut 59K.
SENS top mutual fund and ETF holders
19 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.22% | 1.2M | $9.1M | — | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 1.84% | 974K | $7.6M | −11,200 (−1.1%) | September 30, 2026 |
| 3 | Fidelity Small Cap Index | 0.81% | 430K | $3.3M | +1,531 (+0.4%) | July 31, 2026 |
| 4 | iShares Russell 2000 Growth ETF | 0.67% | 352K | $2.7M | −445 (−0.1%) | September 30, 2026 |
| 5 | Schwab US Small-Cap ETF™ | 0.49% | 259K | $2.0M | +171 (+0.1%) | September 30, 2026 |
| 6 | Fidelity Extended Market Index | 0.46% | 245K | $1.9M | −16,778 (−6.4%) | August 31, 2026 |
| 7 | Vanguard Russell 2000 ETF | 0.43% | 227K | $1.8M | +4,455 (+2.0%) | August 31, 2026 |
| 8 | iShares Micro-Cap ETF | 0.22% | 119K | $922,315 | −819 (−0.7%) | September 30, 2026 |
| 9 | Stt Strt® SPDR® S&P®HlthCrEqpmntETF | 0.22% | 115K | $891,848 | −2,802 (−2.4%) | September 30, 2026 |
| 10 | Schwab Small Cap Index | 0.18% | 96K | $746,169 | — | August 31, 2026 |
| 11 | Fidelity Total Market Index | 0.17% | 90K | $695,811 | — | August 31, 2026 |
| 12 | iShares Core S&P Total US Stock Mkt ETF | 0.17% | 89K | $689,720 | +80 (+0.1%) | September 30, 2026 |
| 13 | Fidelity Series Total Market Index | 0.14% | 75K | $586,223 | −9,814 (−11.5%) | August 31, 2026 |
| 14 | iShares Russell 2000 Small-Cap Idx Instl | 0.14% | 74K | $573,038 | — | August 31, 2026 |
| 15 | EA Bridgeway Ultra-Small Company Mkt ETF | 0.12% | 61K | $476,068 | — | September 30, 2026 |
| 16 | Nuveen Small Cap Blend Idx R6 | 0.10% | 52K | $405,073 | — | August 31, 2026 |
| 17 | Schwab Total Stock Market Index | 0.09% | 47K | $366,006 | — | August 31, 2026 |
| 18 | Vanguard Russell 2000 Growth ETF | 0.08% | 43K | $332,944 | +206 (+0.5%) | August 31, 2026 |
| 19 | EQ/2000 Managed Volatility IB | 0.08% | 42K | $328,601 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
SENS insider transactions
latest 5| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-13 | Douglas A Roeder | Buy | $5.73 | 17,500 | $100,275 |
| 2026-03-13 | Timothy T Goodnow | Buy | $5.79 | 17,225 | $99,733 |
| 2025-11-10 | Edelman Steven | Buy | $6.55 | 10,000 | $65,500 |
| 2025-11-07 | Douglas A Roeder | Buy | $5.83 | 15,000 | $87,450 |
| 2025-11-07 | Frederick T Sullivan | Buy | $5.88 | 5,415 | $31,840 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
SENS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns SENS
Institutional investors own 39.6% of Senseonics's shares and insiders 9.87%. The largest holder is Sessa Capital, L.P with 8.39% of the shares (4.4M), as of June 30, 2026. Among the top 20 institutions, 19 added shares and 1 reduced their stake in the latest filings. Short interest is 10.43% of the float, or 7.46 days of average trading volume. The share count rose 811.4% since 2014.
Related: SENS analyst forecast, SENS key metrics. See the SENS stock overview for the latest quote and news.
SENS ownership FAQ
Who owns the most Senseonics stock?
The largest shareholders of Senseonics are Sessa Capital, L.P (8.39%), BlackRock Inc (5.28%), Vanguard Capital Management, LLC (3.37%), Avidity Partners Management LP (3.03%), Sio Capital Management, LLC (3.01%).
What percentage of Senseonics is owned by institutions?
Institutions hold 39.6% of Senseonics's shares outstanding; insiders hold 9.87%.
Which funds own Senseonics?
The largest fund holders of Senseonics are Vanguard MStar Total Stk Mkt Idx Invest (2.22%), iShares Russell 2000 ETF (1.84%), Fidelity Small Cap Index (0.81%), iShares Russell 2000 Growth ETF (0.67%), Schwab US Small-Cap ETF™ (0.49%).
What is Senseonics's short interest?
5.4M shares of Senseonics were sold short, 10.43% of the float; at the average daily volume it would take 7.46 days to cover.
Are insiders buying or selling Senseonics?
Of the latest 5 reported insider transactions in Senseonics (since November 7, 2025), 5 were purchases and 0 were sales.
How many shares of Senseonics are outstanding?
Senseonics has 52.9M shares outstanding, of which 43.7M are in the public float.