Who owns MZYX
Which tracked institutional funds hold MZYX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MZYX company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-02). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
Conviction spread
MZYX’s largest tracked holder by dollar value, Anson Funds Management LP, sizes it at 2.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 2.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MZYX 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
Only one quarter (2026-Q2) of 13F history is available — a quarter-over-quarter accumulation delta needs two.
We do not publish a positioning read for a window we cannot measure honestly. A starting question, not a verdict.
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 |
|---|---|---|---|---|
| Anson Funds Management LP new | 2,450,000 | $25M | 10.1% | 2026-Q2 |
| MMCAP International Inc. SPC new | 1,750,000 | $17M | 7.2% | 2026-Q2 |
| Polar Asset Management Partners Inc. new | 1,750,000 | $17M | 7.2% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. new | 1,250,000 | $13M | 5.2% | 2026-Q2 |
| Linden Advisors LP new | 1,000,000 | $10M | 4.1% | 2026-Q2 |
| Jain Global LLC new | 1,000,000 | $10M | 4.1% | 2026-Q2 |
| ExodusPoint Capital Management, LP new | 1,000,000 | $10M | 4.1% | 2026-Q2 |
| Magnetar Financial LLC new | 1,000,000 | $10M | 4.1% | 2026-Q2 |
| AQR Arbitrage LLC new | 789,195 | $8M | 3.2% | 2026-Q2 |
| Hudson Bay Capital Management LP new | 750,000 | $7M | 3.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC new | 750,000 | $7M | 3.1% | 2026-Q2 |
| CITADEL ADVISORS LLC new | 741,776 | $7M | 3.1% | 2026-Q2 |
| D. E. Shaw & Co., Inc. new | 711,898 | $7M | 2.9% | 2026-Q2 |
| SONA ASSET MANAGEMENT (US) LLC new | 600,000 | $6M | 2.5% | 2026-Q2 |
| HGC Investment Management Inc. new | 575,000 | $6M | 2.4% | 2026-Q2 |
| OMERS ADMINISTRATION Corp new | 522,000 | $5M | 2.2% | 2026-Q2 |
| LMR Partners LLP new | 500,000 | $5M | 2.1% | 2026-Q2 |
| Context Capital Management, LLC new | 500,000 | $5M | 2.0% | 2026-Q2 |
| Alberta Investment Management Corp new | 500,000 | $5M | 2.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS new | 481,000 | $5M | 2.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP new | 473,062 | $5M | 1.9% | 2026-Q2 |
| Wealthspring Capital LLC new | 424,252 | $4M | 1.7% | 2026-Q2 |
| Ghisallo Capital Management LLC new | 400,000 | $4M | 1.7% | 2026-Q2 |
| Radcliffe Capital Management, L.P. new | 350,800 | $3M | 1.4% | 2026-Q2 |
| TIG Advisors, LLC new | 350,100 | $3M | 1.4% | 2026-Q2 |
| Qube Research & Technologies Ltd new | 300,000 | $3M | 1.2% | 2026-Q2 |
| Shaolin Capital Management LLC new | 281,715 | $3M | 1.2% | 2026-Q2 |
| DLD Asset Management, LP new | 274,620 | $3M | 1.1% | 2026-Q2 |
| WHITEBOX ADVISORS LLC new | 250,000 | $2M | 1.0% | 2026-Q2 |
| Pantera Capital Partners LP new | 250,000 | $2M | 1.0% | 2026-Q2 |
| Westchester Capital Management, LLC new | 200,000 | $2M | 0.8% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS new | 200,000 | $2M | 0.8% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT new | 199,992 | $2M | 0.8% | 2026-Q2 |
| Periscope Capital Inc. new | 174,800 | $2M | 0.7% | 2026-Q2 |
| DEUTSCHE BANK AG\ new | 150,000 | $1M | 0.6% | 2026-Q2 |
| Cable Car Capital, LP new | 150,000 | $1M | 0.6% | 2026-Q2 |
| Sculptor Capital LP new | 125,000 | $89K | 0.0% | 2026-Q2 |
| Kryger Capital LLC new | 109,524 | $1M | 0.4% | 2026-Q2 |
| MIZUHO SECURITIES USA LLC new | 102,023 | $1M | 0.4% | 2026-Q2 |
| Parallax Volatility Advisers, L.P. new | 100,000 | $1M | 0.4% | 2026-Q2 |
| TORONTO DOMINION BANK new | 100,000 | $1M | 0.4% | 2026-Q2 |
| BlueCrest Capital Management Ltd new | 100,000 | $1M | 0.4% | 2026-Q2 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC new | 100,000 | $998K | 0.4% | 2026-Q2 |
| Galaxy Digital Inc. new | 100,000 | $997K | 0.4% | 2026-Q2 |
| Lineage Point Capital LP new | 77,811 | $789K | 0.3% | 2026-Q2 |
| CSS LLC/IL new | 77,108 | $54K | 0.0% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC new | 76,485 | $763K | 0.3% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC new | 52,775 | $526K | 0.2% | 2026-Q2 |
| JPMORGAN CHASE & CO new | 50,000 | $502K | 0.2% | 2026-Q2 |
| Centiva Capital, LP new | 50,000 | $498K | 0.2% | 2026-Q2 |
| DELTEC ASSET MANAGEMENT LLC new | 50,000 | $498K | 0.2% | 2026-Q2 |
| HEIGHTS CAPITAL MANAGEMENT, INC new | 50,000 | $498K | 0.2% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD new | 50,000 | $498K | 0.2% | 2026-Q2 |
| BERKLEY W R CORP new | 49,700 | $496K | 0.2% | 2026-Q2 |
| Clear Street Group Inc. new | 40,499 | $404K | 0.2% | 2026-Q2 |
| K2 PRINCIPAL FUND, L.P. new | 37,500 | $26K | 0.0% | 2026-Q2 |
| ABC ARBITRAGE SA new | 30,000 | $299K | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP new | 15,000 | $151K | 0.1% | 2026-Q2 |
| Arax Advisory Partners new | 908 | $9K | 0.0% | 2026-Q2 |
| UBS Group AG new | 60 | $604 | 0.0% | 2026-Q2 |
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.