Who owns Senseonics Holdings (SENS)
Which tracked institutional funds hold SENS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SENS company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on SENS is one-sided between 2026-Q1 and 2026-Q2: 21 added or opened and 7 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
SENS’s largest tracked holder by dollar value, Sessa Capital IM, L.P., sizes it at 0.4% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.4pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in SENS divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 109 tracked filers holding SENS, 75 increased or opened the position and 36 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in SENS between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 7
- Avidity Partners Management LP$9M
- Walleye Capital LLC$2M
- VANGUARD PORTFOLIO MANAGEMENT LLC$2M
- Trexquant Investment LP$768K
- Ghisallo Capital Management LLC$710K
- READYSTATE ASSET MANAGEMENT LP$574K
Full exits 1
- Hood River Capital Management LLC$1M
Largest adds
- Sessa Capital IM, L.P.$13M
- BlackRock, Inc.$12M
- Sio Capital Management, LLC$8M
- UBS Group AG$5M
- GEODE CAPITAL MANAGEMENT, LLC$3M
- BANK OF AMERICA CORP /DE/$2M
Largest trims
- MILLENNIUM MANAGEMENT LLC$3M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$1M
- MARSHALL WACE, LLP$788K
- VANGUARD CAPITAL MANAGEMENT LLC$664K
- DEUTSCHE BANK AG\$338K
- CITADEL ADVISORS LLC$322K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Sessa Capital IM, L.P. added | 4,437,532 | $25M | 21.3% | 2026-Q2 |
| BlackRock, Inc. added | 2,793,558 | $16M | 13.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,779,398 | $10M | 8.5% | 2026-Q2 |
| Avidity Partners Management LP new | 1,600,000 | $9M | 7.7% | 2026-Q2 |
| Sio Capital Management, LLC added | 1,592,692 | $9M | 7.6% | 2026-Q2 |
| UBS Group AG added | 1,487,429 | $8M | 7.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,132,210 | $6M | 5.4% | 2026-Q2 |
| MASTERS CAPITAL MANAGEMENT LLC added | 700,000 | $4M | 3.4% | 2026-Q2 |
| STATE STREET CORP added | 511,117 | $3M | 2.5% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 405,695 | $2M | 1.9% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 394,465 | $2M | 1.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 393,211 | $2M | 1.9% | 2026-Q2 |
| NORTHERN TRUST CORP added | 332,266 | $2M | 1.6% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 331,353 | $2M | 1.6% | 2026-Q2 |
| Walleye Capital LLC trimmed | 324,264 | $2M | 1.6% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 272,375 | $2M | 1.3% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 231,509 | $1M | 1.1% | 2026-Q2 |
| MORGAN STANLEY added | 164,984 | $937K | 0.8% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 153,216 | $870K | 0.7% | 2026-Q2 |
| Trexquant Investment LP new | 135,128 | $768K | 0.6% | 2026-Q2 |
| Ghisallo Capital Management LLC new | 125,000 | $710K | 0.6% | 2026-Q2 |
| READYSTATE ASSET MANAGEMENT LP new | 101,000 | $574K | 0.5% | 2026-Q2 |
| Penn Capital Management Company, LLC new | 94,140 | $535K | 0.5% | 2026-Q2 |
| SEI INVESTMENTS CO added | 85,738 | $487K | 0.4% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 84,483 | $480K | 0.4% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 79,218 | $450K | 0.4% | 2026-Q2 |
| FOX RUN MANAGEMENT, L.L.C. new | 70,898 | $403K | 0.3% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 68,300 | $388K | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 59,701 | $339K | 0.3% | 2026-Q2 |
| TOCQUEVILLE ASSET MANAGEMENT L.P. added | 55,500 | $315K | 0.3% | 2026-Q2 |
| Nuveen, LLC new | 52,133 | $296K | 0.3% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 51,275 | $292K | 0.2% | 2026-Q2 |
| Stonepine Capital Management, LLC new | 48,680 | $277K | 0.2% | 2026-Q2 |
| Centiva Capital, LP added | 43,975 | $250K | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS new | 42,790 | $243K | 0.2% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 39,260 | $223K | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 37,413 | $213K | 0.2% | 2026-Q2 |
| Invesco Ltd. new | 36,936 | $210K | 0.2% | 2026-Q2 |
| GMT Capital Corp | 36,468 | $207K | 0.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 34,637 | $197K | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 33,792 | $192K | 0.2% | 2026-Q2 |
| Brevan Howard Capital Management LP added | 28,911 | $164K | 0.1% | 2026-Q2 |
| Pathstone Holdings, LLC | 25,000 | $142K | 0.1% | 2026-Q2 |
| Symmetry Partners, LLC added | 24,873 | $141K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC new | 23,638 | $134K | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 18,796 | $107K | 0.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 18,331 | $104K | 0.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 18,167 | $103K | 0.1% | 2026-Q2 |
| Jefferies Financial Group Inc. trimmed | 18,003 | $102K | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 17,572 | $104K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 15,568 | $88K | 0.1% | 2026-Q2 |
| CAPTRUST FINANCIAL ADVISORS added | 14,057 | $80K | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 12,855 | $73K | 0.1% | 2026-Q2 |
| LPL Financial LLC trimmed | 12,549 | $71K | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. new | 12,000 | $80K | 0.1% | 2026-Q2 |
| Cetera Investment Advisers trimmed | 11,794 | $67K | 0.1% | 2026-Q2 |
| State of Wyoming trimmed | 11,741 | $67K | 0.1% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey new | 11,636 | $66K | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 11,460 | $65K | 0.1% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 11,156 | $63K | 0.1% | 2026-Q2 |
| TOWNSEND ASSET MANAGEMENT CORP /NC/ /ADV | 10,928 | $62K | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND new | 10,100 | $57K | 0.0% | 2026-Q2 |
| BARCLAYS PLC added | 8,635 | $49K | 0.0% | 2026-Q2 |
| Integrated Wealth Concepts LLC trimmed | 6,400 | $36K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 5,725 | $32K | 0.0% | 2026-Q2 |
| Legal & General Group Plc new | 3,837 | $22K | 0.0% | 2026-Q2 |
| Ameritas Investment Partners, Inc. new | 3,580 | $20K | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 2,192 | $12K | 0.0% | 2026-Q2 |
| Pfizer Inc | 2,171 | $12K | 0.0% | 2026-Q2 |
| Ameritas Advisory Services, LLC trimmed | 1,880 | $11K | 0.0% | 2026-Q2 |
| Decker Retirement Planning Inc. new | 1,800 | $10K | 0.0% | 2026-Q2 |
| Tidemark, LLC | 1,583 | $9K | 0.0% | 2026-Q2 |
| SIMPLEX TRADING, LLC trimmed | 1,350 | $8K | 0.0% | 2026-Q2 |
| FMR LLC trimmed | 1,094 | $6K | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) trimmed | 926 | $5K | 0.0% | 2026-Q2 |
| HARBOUR INVESTMENTS, INC. added | 605 | $3K | 0.0% | 2026-Q2 |
| Rockefeller Capital Management L.P. added | 560 | $3K | 0.0% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM new | 543 | $3K | 0.0% | 2026-Q2 |
| NFSG Corp trimmed | 395 | $2K | 0.0% | 2026-Q2 |
| Global Retirement Partners, LLC new | 339 | $2K | 0.0% | 2026-Q2 |
| Quarry LP trimmed | 321 | $2K | 0.0% | 2026-Q2 |
| Continuum Advisory, LLC new | 321 | $2K | 0.0% | 2026-Q2 |
| Cassaday & Co Wealth Management LLC trimmed | 300 | $2K | 0.0% | 2026-Q2 |
| COMPASS FINANCIAL MANAGEMENT LLC new | 215 | $1K | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP trimmed | 200 | $1K | 0.0% | 2026-Q2 |
| Allworth Financial LP trimmed | 196 | $1K | 0.0% | 2026-Q2 |
| PlanVest Financial, Inc | 186 | $1K | 0.0% | 2026-Q2 |
| Smartleaf Asset Management LLC | 150 | $891 | 0.0% | 2026-Q2 |
| Sterling Capital Management LLC new | 139 | $790 | 0.0% | 2026-Q2 |
| City State Bank | 138 | $784 | 0.0% | 2026-Q2 |
| Federation des caisses Desjardins du Quebec | 100 | $568 | 0.0% | 2026-Q2 |
| NewEdge Advisors, LLC | 100 | $568 | 0.0% | 2026-Q2 |
| SUMMIT SECURITIES GROUP LLC added | 100 | $568 | 0.0% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ | 100 | $567 | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. | 78 | $443 | 0.0% | 2026-Q2 |
| IFP Advisors, Inc trimmed | 75 | $426 | 0.0% | 2026-Q2 |
| Highland Investment Advisors LLC new | 67 | $381 | 0.0% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd new | 56 | $318 | 0.0% | 2026-Q2 |
| SIGNATUREFD, LLC | 50 | $284 | 0.0% | 2026-Q2 |
| Truvestments Capital LLC | 50 | $284 | 0.0% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.