SENSEONICS HLDGS INC SENS
COM · Common Stock · CUSIP 81727U303
Company in Germantown, United States
- SectorTechnology
- IndustryIndustrial Instruments For Measurement, Display, and Control
- HeadquartersGermantown, MD
- Founded1996
- Websitesenseonics.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 52.9m as of 2026-07-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $5.68. Options: 4 managers hold calls ($2.6m notional), 5 hold puts ($501.0k).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2025 | 8 |
| Q4 2025 | 85 |
| Q1 2026 | 85 |
| Q2 2026 | 108 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2025 | 81 | 7 |
| Q1 2026 | 38 | 41 |
| Q2 2026 | 71 | 32 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $0 | $0 | — |
| Q4 2025 | $2.1m | $2.3m | 1.08 |
| Q1 2026 | $2.1m | $2.3m | 1.07 |
| Q2 2026 | $2.6m | $501.0k | 0.19 |
Biggest buyers
| Sessa Capital IM, L.P. | Added | +2.7m |
| BlackRock, Inc. | Added | +2.2m |
| Avidity Partners Management LP | New | +1.6m |
| Sio Capital Management, LLC | Added | +1.5m |
| UBS Group AG | Added | +1.0m |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +665.7k |
| BANK OF AMERICA CORP /DE/ | Added | +337.5k |
| STATE STREET CORP | Added | +330.8k |
| Walleye Capital LLC | New | +324.3k |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New | +272.4k |
Biggest sellers
| MILLENNIUM MANAGEMENT LLC | Reduced | -481.2k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | -217.7k |
| Hood River Capital Management LLC | Sold out | -186.4k |
| MARSHALL WACE, LLP | Reduced | -58.7k |
| DEUTSCHE BANK AG\ | Reduced | -44.9k |
| CITADEL ADVISORS LLC | Reduced | -43.4k |
| Jain Global LLC | Sold out | -35.9k |
| OMERS ADMINISTRATION Corp | Sold out | -31.0k |
| Hudson Bay Capital Management LP | Sold out | -23.5k |
| Schonfeld Strategic Advisors LLC | Sold out | -20.4k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $2.0m346.6k shares |
| IMC-Chicago, LLC | Reduced | $475.4k83.7k shares |
| SIMPLEX TRADING, LLC | Added | $91.4k16.1k shares |
| GROUP ONE TRADING LLC | Reduced | $88.6k15.6k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $236.9k41.7k shares |
| IMC-Chicago, LLC | Reduced | $124.4k21.9k shares |
| CITADEL ADVISORS LLC | Reduced | $82.9k14.6k shares |
| GROUP ONE TRADING LLC | New | $39.2k6.9k shares |
| SIMPLEX TRADING, LLC | Reduced | $17.6k3.1k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Sessa Capital IM, L.P. 13G · institution new · filed 2026-08-14 | 9.9% |
| BlackRock, Inc. 13G · institution -1.4 pts · filed 2026-10-27 | 5.2% |
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 3 | $182.6k | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 3 | $184.8k | 0 | — | — |
| Q1 2026 | 2 | $200.0k | 0 | — | — |
| Q2 2026 | 1 | $126.1k | 0 | — | — |
| Q3 2026 | 1 | $125.3k | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-08-19 | ROEDER DOUGLAS A Director | Bought | $125.3k14.0k shares |
| 2026-05-12 | ROEDER DOUGLAS A Director | Bought | $126.1k22.7k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| Sessa Capital IM, L.P. 0.44% of their portfolio | 4.4m $25.2m | Added +2.7m |
| BlackRock, Inc. 0.00% of their portfolio | 2.8m $15.9m | Added +2.2m |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 1.8m $10.1m | Added +162.2k |
| Avidity Partners Management LP 1.46% of their portfolio | 1.6m $9.1m | New |
| Sio Capital Management, LLC 1.55% of their portfolio | 1.6m $9.0m | Added +1.5m |
| UBS Group AG 0.00% of their portfolio | 1.5m $8.4m | Added +1.0m |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.1m $6.4m | Added +665.7k |
| MASTERS CAPITAL MANAGEMENT LLC 0.56% of their portfolio | 700.0k $4.0m | Added +200.0k |
| STATE STREET CORP 0.00% of their portfolio | 511.1k $2.9m | Added +330.8k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 405.7k $2.3m | Reduced -58.7k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 394.5k $2.2m | Added +337.5k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 393.2k $2.2m | Added +172.0k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 332.3k $1.9m | Added +250.0k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 331.4k $1.9m | Added +106.2k |
| Walleye Capital LLC 0.01% of their portfolio | 324.3k $1.8m | New |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 272.4k $1.5m | New |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 231.5k $1.3m | Added +85.2k |
| MORGAN STANLEY 0.00% of their portfolio | 165.0k $937.1k | Added +41.0k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 153.2k $870.3k | Added +153.2k |
| Trexquant Investment LP 0.00% of their portfolio | 135.1k $767.5k | New |
| Ghisallo Capital Management LLC 0.01% of their portfolio | 125.0k $710.0k | New |
| READYSTATE ASSET MANAGEMENT LP 0.02% of their portfolio | 101.0k $573.7k | New |
| Penn Capital Management Company, LLC 0.03% of their portfolio | 94.1k $534.7k | New |
| SEI INVESTMENTS CO 0.00% of their portfolio | 85.7k $487.0k | Added +36.1k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 84.5k $479.9k | New |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 79.2k $450.0k | Reduced -481.2k |
| FOX RUN MANAGEMENT, L.L.C. 0.07% of their portfolio | 70.9k $402.7k | New |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 68.3k $387.9k | Added +18.7k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 59.7k $339.1k | Added +59.7k |
| TOCQUEVILLE ASSET MANAGEMENT L.P. 0.00% of their portfolio | 55.5k $315.2k | Added +22.0k |
| Nuveen, LLC 0.00% of their portfolio | 52.1k $296.1k | New |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 51.3k $292.0k | Added +32.4k |
| Stonepine Capital Management, LLC 0.21% of their portfolio | 48.7k $276.5k | New |
| Centiva Capital, LP 0.01% of their portfolio | 44.0k $249.8k | Added +19.3k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 42.8k $243.0k | New |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 39.3k $223.0k | Reduced -44.9k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 37.4k $212.5k | Added +36.0k |
| Invesco Ltd. 0.00% of their portfolio | 36.9k $209.8k | New |
| GMT Capital Corp 0.01% of their portfolio | 36.5k $207.1k | Unchanged |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 34.6k $196.7k | Added +7.0k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 33.8k $191.9k | Reduced -43.4k |
| Brevan Howard Capital Management LP 0.00% of their portfolio | 28.9k $164.2k | Added +15.8k |
| Pathstone Holdings, LLC 0.00% of their portfolio | 25.0k $142.0k | Unchanged |
| Symmetry Partners, LLC 0.01% of their portfolio | 24.9k $141.3k | Added +614 |
| MetLife Investment Management, LLC 0.00% of their portfolio | 23.6k $134.3k | New |
| CITIGROUP INC 0.00% of their portfolio | 18.8k $106.8k | Added +18.7k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 18.3k $104.1k | New |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 18.2k $103.2k | New |
| Jefferies Financial Group Inc. 0.00% of their portfolio | 18.0k $102.3k | Reduced -9.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 17.6k $104.4k | New |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 15.6k $88.4k | Unchanged |
| Virtu Financial LLC 0.00% of their portfolio | 14.4k $82.0k | New |
| CAPTRUST FINANCIAL ADVISORS 0.00% of their portfolio | 14.1k $79.8k | Added +82 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 12.9k $73.0k | Reduced -217.7k |
| LPL Financial LLC 0.00% of their portfolio | 12.5k $71.3k | Reduced -3.3k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 12.0k $79.9k | New |
| Cetera Investment Advisers 0.00% of their portfolio | 11.8k $67.0k | Reduced -900 |
| State of Wyoming 0.01% of their portfolio | 11.7k $66.7k | New |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 11.6k $66.1k | New |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 11.5k $65.1k | New |
| Squarepoint Ops LLC 0.00% of their portfolio | 11.2k $63.4k | Reduced -9.5k |
| TOWNSEND ASSET MANAGEMENT CORP /NC/ /ADV 0.02% of their portfolio | 10.9k $62.1k | Unchanged |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 10.1k $57.4k | New |
| BARCLAYS PLC 0.00% of their portfolio | 8.6k $49.0k | Added +8.0k |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 6.4k $36.4k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 5.7k $32.0k | Added +1.2k |
| Legal & General Group Plc 0.00% of their portfolio | 3.8k $21.8k | New |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 3.6k $20.3k | New |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 2.2k $12.4k | Added +289 |
| Ameritas Advisory Services, LLC 0.00% of their portfolio | 1.9k $10.7k | New |
| Decker Retirement Planning Inc. 0.00% of their portfolio | 1.8k $10.2k | New |
| Tidemark, LLC 0.00% of their portfolio | 1.6k $9.0k | Unchanged |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 1.4k $7.7k | New |
| TSFG, LLC 0.00% of their portfolio | 1.1k $6.0k | Unchanged |
| FMR LLC 0.00% of their portfolio | 1.1k $6.2k | Reduced -13.6k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 926 $5.3k | Reduced -3.9k |
| HARBOUR INVESTMENTS, INC. 0.00% of their portfolio | 605 $3.4k | Added +461 |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 560 $3.2k | Added +20 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 543 $3.1k | New |
| NFSG Corp 0.00% of their portfolio | 395 $2.2k | Reduced -525 |
| Global Retirement Partners, LLC 0.00% of their portfolio | 339 $1.9k | First filing |
| Continuum Advisory, LLC 0.00% of their portfolio | 321 $1.8k | New |
| Quarry LP 0.00% of their portfolio | 321 $1.8k | New |
| Cassaday & Co Wealth Management LLC 0.00% of their portfolio | 300 $1.7k | Reduced -460 |
| COMPASS FINANCIAL MANAGEMENT LLC 0.00% of their portfolio | 215 $1.2k | First filing |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 200 $1.1k | New |
| Allworth Financial LP 0.00% of their portfolio | 196 $1.1k | Reduced -5 |
| PlanVest Financial, Inc 0.00% of their portfolio | 186 $1.1k | Unchanged |
| Smartleaf Asset Management LLC 0.00% of their portfolio | 150 $891 | Unchanged |
| Sterling Capital Management LLC 0.00% of their portfolio | 139 $790 | New |
| City State Bank 0.00% of their portfolio | 138 $784 | Unchanged |
| NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio | 100 $567 | Unchanged |
| SUMMIT SECURITIES GROUP LLC 0.00% of their portfolio | 100 $568 | New |
| NewEdge Advisors, LLC 0.00% of their portfolio | 100 $568 | Unchanged |
| Federation des caisses Desjardins du Quebec 0.00% of their portfolio | 100 $568 | Unchanged |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 78 $443 | Unchanged |
| IFP Advisors, Inc 0.00% of their portfolio | 75 $426 | Reduced -1.1k |
| Highland Investment Advisors LLC 0.00% of their portfolio | 67 $381 | First filing |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 56 $318 | New |
| SIGNATUREFD, LLC 0.00% of their portfolio | 50 $284 | Unchanged |