Who owns MediciNova (MNOV)
Which tracked institutional funds hold MNOV, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MNOV 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.
Conviction spread
MNOV’s largest tracked holder by dollar value, Essex Woodlands Management, Inc., sizes it at 0.6% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.6pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MNOV 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 28 tracked filers holding MNOV, 8 increased or opened the position and 13 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 |
|---|---|---|---|---|
| Essex Woodlands Management, Inc. | 1,105,941 | $1M | 16.6% | 2026-Q2 |
| BlackRock, Inc. added | 752,091 | $993K | 11.3% | 2026-Q2 |
| CITIGROUP INC | 635,715 | $839K | 9.6% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 609,052 | $804K | 9.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 539,312 | $712K | 8.1% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 282,608 | $373K | 4.3% | 2026-Q2 |
| UBS Group AG | 222,200 | $293K | 3.3% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 205,400 | $271K | 3.1% | 2026-Q2 |
| STATE STREET CORP | 193,698 | $256K | 2.9% | 2026-Q2 |
| NORTHERN TRUST CORP added | 143,665 | $190K | 2.2% | 2026-Q2 |
| Bank of New York Mellon Corp | 78,277 | $103K | 1.2% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 71,506 | $94K | 1.1% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 56,031 | $74K | 0.8% | 2026-Q2 |
| SBI Securities Co., Ltd. added | 51,479 | $68K | 0.8% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP | 50,552 | $67K | 0.8% | 2026-Q2 |
| BARCLAYS PLC trimmed | 42,806 | $57K | 0.6% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC trimmed | 36,157 | $48K | 0.5% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 26,752 | $35K | 0.4% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 15,818 | $21K | 0.2% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 15,599 | $21K | 0.2% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 13,526 | $18K | 0.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 13,159 | $17K | 0.2% | 2026-Q2 |
| Focus Partners Advisor Solutions, LLC | 10,000 | $13K | 0.2% | 2026-Q2 |
| MORGAN STANLEY | 2,000 | $3K | 0.0% | 2026-Q2 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | 305 | $403 | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. | 66 | $87 | 0.0% | 2026-Q2 |
| Larson Financial Group LLC new | 5 | $7 | 0.0% | 2026-Q2 |
| Caitong International Asset Management Co., Ltd new | 2 | $3 | 0.0% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 27,824 | $38K | 0.4% | 2026-Q1 stale (1 quarter behind) |
| JPMORGAN CHASE & CO added | 20,576 | $28K | 0.3% | 2026-Q1 stale (1 quarter behind) |
| XTX Topco Ltd new | 14,117 | $19K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| HANTZ FINANCIAL SERVICES, INC. trimmed | 4,232 | $6K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Banque Transatlantique SA new | 1,850 | $3K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| VANGUARD GROUP INC added | 705,625 | $924K | 10.5% | 2025-Q4 stale (2 quarters behind) |
| DRW Securities, LLC new | 3,800 | $821K | 9.4% | 2025-Q4 stale (2 quarters behind) |
| Lantern Wealth Advisors, LLC new | 30,000 | $39K | 0.4% | 2025-Q4 stale (2 quarters behind) |
| CITADEL ADVISORS LLC trimmed | 28,712 | $38K | 0.4% | 2025-Q4 stale (2 quarters behind) |
| StoneX Group Inc. new | 19,200 | $25K | 0.3% | 2025-Q4 stale (2 quarters behind) |
| Tower Research Capital LLC (TRC) trimmed | 1,846 | $2K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| FMR LLC new | 50 | $63 | 0.0% | 2025-Q3 stale (3 quarters behind) |
| ROYAL BANK OF CANADA new | 6 | — | 0.0% | 2025-Q3 stale (3 quarters behind) |
| BNP PARIBAS FINANCIAL MARKETS | 412 | $540 | 0.0% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
1 parent filing withheld from the table above, and from the coverage figures, to avoid listing one book twice: TWO SIGMA ADVISERS, LP (last filed 2025-Q4, 13,500 shares) reconciles to its 1 current affiliate (13,526 shares) — 0.193% apart.
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.