Who owns MRNOW (MRNOW)
Which tracked institutional funds hold MRNOW, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MRNOW company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
Conviction spread
MRNOW’s largest tracked holder by dollar value, CANTOR FITZGERALD, L. P., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MRNOW 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 28 tracked filers holding MRNOW, 2 increased or opened the position and 12 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
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 |
|---|---|---|---|---|
| Linden Advisors LP | 749,999 | $34K | 3.8% | 2026-Q1 |
| Polar Asset Management Partners Inc. trimmed | 562,105 | $26K | 2.9% | 2026-Q1 |
| Calamos Advisors LLC | 625,000 | $25K | 2.8% | 2026-Q1 |
| MMCAP International Inc. SPC | 500,000 | $20K | 2.2% | 2026-Q1 |
| Athos Capital Ltd | 42,840 | $18K | 2.0% | 2026-Q1 |
| D. E. Shaw & Co., Inc. | 375,000 | $15K | 1.7% | 2026-Q1 |
| LMR Partners LLP | 375,000 | $15K | 1.7% | 2026-Q1 |
| CSS LLC/IL | 251,454 | $10K | 1.1% | 2026-Q1 |
| Q Global Advisors, LLC | 218,153 | $9K | 1.0% | 2026-Q1 |
| Clear Street Group Inc. trimmed | 222,820 | $9K | 1.0% | 2026-Q1 |
| Saba Capital Management, L.P. | 174,998 | $8K | 0.9% | 2026-Q1 |
| Creek Drive Management Group LLC | 200,000 | $8K | 0.9% | 2026-Q1 |
| Verition Fund Management LLC | 165,000 | $7K | 0.7% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. | 125,747 | $6K | 0.6% | 2026-Q1 |
| Stonebridge Wealth Management, LLC trimmed | 120,910 | $5K | 0.5% | 2026-Q1 |
| Harraden Circle Investments, LLC | 107,948 | $4K | 0.5% | 2026-Q1 |
| Walleye Capital LLC trimmed | 105,843 | $4K | 0.5% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC trimmed | 91,207 | $4K | 0.4% | 2026-Q1 |
| Context Capital Management, LLC trimmed | 67,500 | $3K | 0.3% | 2026-Q1 |
| Warberg Asset Management LLC trimmed | 63,000 | $3K | 0.3% | 2026-Q1 |
| Sculptor Capital LP | 49,672 | $2K | 0.3% | 2026-Q1 |
| Virtu Financial LLC new | 27,132 | $1K | 0.1% | 2026-Q1 |
| OMERS ADMINISTRATION Corp | 25,000 | $1K | 0.1% | 2026-Q1 |
| WHITEBOX ADVISORS LLC | 23,500 | $940 | 0.1% | 2026-Q1 |
| PEAK6 LLC | 23,000 | $920 | 0.1% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC | 22,905 | $916 | 0.1% | 2026-Q1 |
| Parallax Volatility Advisers, L.P. trimmed | 11,427 | $577 | 0.1% | 2026-Q1 |
| UBS Group AG added | 2,213 | $89 | 0.0% | 2026-Q1 |
| CANTOR FITZGERALD, L. P. added | 2,550,000 | $372K | 41.5% | 2025-Q3 stale |
| Clear Street Derivatives LLC | 616,000 | $120K | 13.4% | 2025-Q2 stale |
| TORONTO DOMINION BANK new | 590,592 | $115K | 12.8% | 2025-Q2 stale |
| CLEAR STREET LLC | 222,720 | $43K | 4.8% | 2025-Q2 stale |
| MORGAN STANLEY new | 121,600 | $3K | 0.4% | 2025-Q4 stale |
| K2 PRINCIPAL FUND, L.P. trimmed | 69,690 | $2K | 0.2% | 2025-Q4 stale |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 50,000 | $1K | 0.1% | 2025-Q4 stale |
| Eisler Capital Management Ltd. | 125,000 | $12 | 0.0% | 2025-Q3 stale |
| BANK OF AMERICA CORP /DE/ | 477 | $12 | 0.0% | 2025-Q4 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 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.