Who owns MSOS
Which tracked institutional funds hold MSOS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MSOS company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 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 MSOS is one-sided between 2025-Q4 and 2026-Q1: 8 added or opened and 38 trimmed or exited — on balance reducing.
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
MSOS’s largest tracked holder by dollar value, Anson Funds Management LP, sizes it at 7.3% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 7.3pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MSOS 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 2025-Q4 and 2026-Q1, across 167 tracked filers holding MSOS, 67 increased or opened the position and 77 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 MSOS between the 2025-Q4 and 2026-Q1 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 2
- Murchinson Ltd.$4M
- BOOTHBAY FUND MANAGEMENT, LLC$976K
Full exits 8
- JANE STREET GROUP, LLC$8M
- Kingsview Wealth Management, LLC$6M
- Weiss Asset Management LP$4M
- Birnam Oak Advisors, LP$3M
- Eschler Asset Management LLP$1M
- Hedges Asset Management LLC$604K
Largest adds
- Anson Funds Management LP$21M
- Concurrent Investment Advisors, LLC$2M
- MILLENNIUM MANAGEMENT LLC$1M
- Corient Private Wealth LLC$737K
- RAFFLES ASSOCIATES LP$408K
- LJI Wealth Management, LLC$253K
Largest trims
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$20M
- NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO$17M
- SUVRETTA CAPITAL MANAGEMENT, LLC$9M
- Marex Group plc$5M
- AdvisorShares Investments LLC$4M
- NewEdge Wealth, LLC$4M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Anson Funds Management LP added | 16,330,922 | $58M | 20.0% | 2026-Q1 |
| SUVRETTA CAPITAL MANAGEMENT, LLC added | 9,046,200 | $32M | 11.1% | 2026-Q1 |
| Marex Group plc added | 7,870,000 | $28M | 9.6% | 2026-Q1 |
| AdvisorShares Investments LLC added | 4,173,764 | $15M | 5.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 3,833,155 | $14M | 4.7% | 2026-Q1 |
| Two Seas Capital LP added | 3,302,409 | $12M | 4.0% | 2026-Q1 |
| Clear Street Group Inc. trimmed | 2,007,632 | $7M | 2.5% | 2026-Q1 |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC trimmed | 1,120,000 | $4M | 1.4% | 2026-Q1 |
| Concurrent Investment Advisors, LLC added | 1,004,507 | $4M | 1.2% | 2026-Q1 |
| Murchinson Ltd. added | 999,895 | $4M | 1.2% | 2026-Q1 |
| CITIGROUP INC trimmed | 888,762 | $3M | 1.1% | 2026-Q1 |
| Sender Co & Partners, Inc. trimmed | 851,638 | $3M | 1.0% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 767,705 | $3M | 0.9% | 2026-Q1 |
| RAFFLES ASSOCIATES LP added | 640,000 | $2M | 0.8% | 2026-Q1 |
| MORGAN STANLEY added | 547,784 | $2M | 0.7% | 2026-Q1 |
| Kazazian Asset Management, LLC added | 526,554 | $2M | 0.6% | 2026-Q1 |
| Venture Visionary Partners LLC added | 481,044 | $2M | 0.6% | 2026-Q1 |
| IMC-Chicago, LLC added | 467,923 | $2M | 0.6% | 2026-Q1 |
| Bleakley Financial Group, LLC trimmed | 443,661 | $2M | 0.5% | 2026-Q1 |
| SCOGGIN MANAGEMENT LP | 375,000 | $1M | 0.5% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 339,474 | $1M | 0.4% | 2026-Q1 |
| Monaco Asset Management SAM trimmed | 325,000 | $1M | 0.4% | 2026-Q1 |
| Corient Private Wealth LLC added | 305,856 | $1M | 0.4% | 2026-Q1 |
| Cresset Asset Management, LLC trimmed | 293,074 | $1M | 0.4% | 2026-Q1 |
| LPL Financial LLC trimmed | 287,965 | $1M | 0.4% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 274,972 | $976K | 0.3% | 2026-Q1 |
| GROUP ONE TRADING LLC trimmed | 255,408 | $907K | 0.3% | 2026-Q1 |
| Lighthouse Investment Partners, LLC | 237,067 | $842K | 0.3% | 2026-Q1 |
| INTREPID CAPITAL MANAGEMENT INC trimmed | 212,250 | $753K | 0.3% | 2026-Q1 |
| Private Advisor Group, LLC added | 191,164 | $679K | 0.2% | 2026-Q1 |
| Parallax Volatility Advisers, L.P. added | 150,611 | $645K | 0.2% | 2026-Q1 |
| CSS LLC/IL added | 177,200 | $629K | 0.2% | 2026-Q1 |
| COMMONWEALTH EQUITY SERVICES, LLC added | 173,119 | $615K | 0.2% | 2026-Q1 |
| HRT FINANCIAL LP added | 149,814 | $531K | 0.2% | 2026-Q1 |
| Simplicity Wealth,LLC trimmed | 137,741 | $489K | 0.2% | 2026-Q1 |
| Geneos Wealth Management Inc. added | 126,846 | $450K | 0.2% | 2026-Q1 |
| Walleye Trading LLC trimmed | 126,727 | $450K | 0.2% | 2026-Q1 |
| Mesirow Financial Investment Management, Inc. added | 125,600 | $446K | 0.2% | 2026-Q1 |
| OSAIC HOLDINGS, INC. trimmed | 122,418 | $435K | 0.1% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 118,400 | $420K | 0.1% | 2026-Q1 |
| IHT Wealth Management, LLC added | 114,782 | $407K | 0.1% | 2026-Q1 |
| LJI Wealth Management, LLC added | 111,020 | $394K | 0.1% | 2026-Q1 |
| VestGen Advisors, LLC | 77,310 | $373K | 0.1% | 2026-Q1 |
| FNY Investment Advisers, LLC trimmed | 104,362 | $370K | 0.1% | 2026-Q1 |
| HighTower Advisors, LLC added | 99,514 | $353K | 0.1% | 2026-Q1 |
| Shay Capital LLC trimmed | 82,500 | $293K | 0.1% | 2026-Q1 |
| A. D. Beadell Investment Counsel, Inc. | 82,400 | $292K | 0.1% | 2026-Q1 |
| EWA, LLC | 81,039 | $288K | 0.1% | 2026-Q1 |
| CIBC WORLD MARKET INC. added | 80,846 | $287K | 0.1% | 2026-Q1 |
| WEXFORD CAPITAL LP added | 80,645 | $286K | 0.1% | 2026-Q1 |
| JW Asset Management, LLC added | 80,000 | $284K | 0.1% | 2026-Q1 |
| NewEdge Wealth, LLC trimmed | 75,368 | $268K | 0.1% | 2026-Q1 |
| Janney Montgomery Scott LLC added | 73,905 | $262K | 0.1% | 2026-Q1 |
| Proficio Capital Partners LLC trimmed | 70,633 | $251K | 0.1% | 2026-Q1 |
| UBS Group AG trimmed | 69,620 | $247K | 0.1% | 2026-Q1 |
| Black Maple Capital Management LP | 65,000 | $231K | 0.1% | 2026-Q1 |
| Pekin Hardy Strauss, Inc. trimmed | 64,476 | $229K | 0.1% | 2026-Q1 |
| &PARTNERS added | 63,584 | $226K | 0.1% | 2026-Q1 |
| TRUIST FINANCIAL CORP trimmed | 61,690 | $219K | 0.1% | 2026-Q1 |
| SIMPLEX TRADING, LLC trimmed | 58,787 | $209K | 0.1% | 2026-Q1 |
| Quinn Opportunity Partners LLC | 54,588 | $194K | 0.1% | 2026-Q1 |
| UHLMANN PRICE SECURITIES, LLC | 53,055 | $188K | 0.1% | 2026-Q1 |
| ArchPoint Investors | 51,050 | $181K | 0.1% | 2026-Q1 |
| DIVERSIFY WEALTH MANAGEMENT, LLC | 34,840 | $169K | 0.1% | 2026-Q1 |
| HERITAGE OAK WEALTH ADVISORS LLC added | 44,706 | $159K | 0.1% | 2026-Q1 |
| Miller Global Investments, LLC | 42,790 | $152K | 0.1% | 2026-Q1 |
| Horrell Capital Management, Inc. added | 42,507 | $145K | 0.0% | 2026-Q1 |
| Oasis Management Co Ltd. | 4,087,116 | $10M | 3.4% | 2025-Q2 stale |
| JANE STREET GROUP, LLC trimmed | 1,661,327 | $8M | 2.7% | 2025-Q4 stale |
| DISCOVERY CAPITAL MANAGEMENT, LLC / CT new | 1,425,000 | $7M | 2.4% | 2025-Q3 stale |
| CLEAR STREET LLC trimmed | 2,780,000 | $7M | 2.3% | 2025-Q2 stale |
| Kingsview Wealth Management, LLC new | 1,266,008 | $6M | 2.1% | 2025-Q4 stale |
| Rovida Advisors Inc. added | 1,200,000 | $6M | 2.0% | 2025-Q3 stale |
| Weiss Asset Management LP new | 946,937 | $4M | 1.5% | 2025-Q4 stale |
| EMINENCE CAPITAL, LP trimmed | 1,481,645 | $4M | 1.3% | 2025-Q1 stale |
| Graham Capital Management, L.P. added | 1,176,253 | $3M | 1.1% | 2025-Q1 stale |
| Birnam Oak Advisors, LP trimmed | 593,782 | $3M | 1.0% | 2025-Q4 stale |
| Simplify Asset Management Inc. new | 444,428 | $2M | 0.7% | 2025-Q3 stale |
| Centiva Capital, LP added | 350,000 | $2M | 0.6% | 2025-Q3 stale |
| Eschler Asset Management LLP added | 296,784 | $1M | 0.5% | 2025-Q4 stale |
| Cruiser Capital Advisors, LLC | 147,600 | $707K | 0.2% | 2025-Q3 stale |
| Mariner, LLC added | 139,748 | $669K | 0.2% | 2025-Q3 stale |
| Hedges Asset Management LLC added | 128,000 | $604K | 0.2% | 2025-Q4 stale |
| Lotus Technology Management, LP new | 127,346 | $601K | 0.2% | 2025-Q4 stale |
| MYDA Advisors LLC added | 120,000 | $575K | 0.2% | 2025-Q3 stale |
| Carrera Capital Advisors added | 232,543 | $560K | 0.2% | 2025-Q2 stale |
| Quarry LP trimmed | 110,162 | $520K | 0.2% | 2025-Q4 stale |
| Waverly Advisors, LLC trimmed | 208,031 | $501K | 0.2% | 2025-Q2 stale |
| MOORE CAPITAL MANAGEMENT, LP new | 100,000 | $479K | 0.2% | 2025-Q3 stale |
| PRELUDE CAPITAL MANAGEMENT, LLC trimmed | 93,668 | $442K | 0.2% | 2025-Q4 stale |
| Kerrisdale Advisers, LLC | 77,470 | $371K | 0.1% | 2025-Q3 stale |
| Freestone Capital Holdings, LLC added | 150,681 | $363K | 0.1% | 2025-Q2 stale |
| SG Americas Securities, LLC new | 73,858 | $349K | 0.1% | 2025-Q4 stale |
| EVERGREEN CAPITAL MANAGEMENT LLC added | 123,040 | $297K | 0.1% | 2025-Q2 stale |
| Tejara Capital Ltd new | 97,000 | $234K | 0.1% | 2025-Q2 stale |
| PCG Wealth Advisors, LLC added | 81,433 | $213K | 0.1% | 2025-Q1 stale |
| CHILDRESS CAPITAL ADVISORS, LLC new | 38,882 | $186K | 0.1% | 2025-Q3 stale |
| Zuckerman Investment Group, LLC trimmed | 34,164 | $164K | 0.1% | 2025-Q3 stale |
| T3 Companies, LLC new | 32,450 | $153K | 0.1% | 2025-Q4 stale |
| DRW Securities, LLC new | 30,000 | $146K | 0.1% | 2025-Q3 stale |
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.