57 tracked 13F filers disclose a position in MREO as of the latest SEC 13F filings, a combined $24.8M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Rubric Capital Management LP | $5.1M | 15.3M | —Held | Q1 2026 | |
| 2 | EcoR1 Capital, LLC | $4.4M | 13.4M | ▲+70% Added · +5.5M sh | Q1 2026 | |
| 3 | 683 Capital Management, LLC | $3.7M | 11.8M | ▼−1.9% Reduced · −222K sh | Q2 2026 | |
| 4 | BANK OF AMERICA CORP /DE/ | $2.7M | 8.2M | ▲321× Added · +8.2M sh | Q1 2026 | |
| 5 | Defilade Capital Management, L.P. | $2.5M | 7.6M | ▲New +7.6M sh | Q1 2026 | |
| 6 | Newtyn Management, LLC | $2.3M | 7.1M | ▲32× Added · +6.9M sh | Q1 2026 | |
| 7 | MILLENNIUM MANAGEMENT LLC | $1.2M | 3.6M | ▲43× Added · +3.5M sh | Q1 2026 | |
| 8 | Tejara Capital Ltd | $647K | 2.0M | —Held | Q2 2026 | |
| 9 | UBS Group AG | $492K | 1.5M | ▼−4.4% Reduced · −69K sh | Q1 2026 | |
| 10 | Wealthspire Advisors, LLC | $263K | 796K | ▲New +796K sh | Q1 2026 | |
| 11 | Ishara Investments LP | $244K | 769K | ▲New +769K sh | Q2 2026 | |
| 12 | MARSHALL WACE, LLP | $227K | 687K | ▲New +687K sh | Q1 2026 | |
| 13 | GROUP ONE TRADING LLC | $111K | 336K | ▼−24% Reduced · −106K sh | Q1 2026 | |
| 14 | Rangeley Capital, LLC | $109K | 329K | ▼−9.6% Reduced · −35K sh | Q1 2026 | |
| 15 | BlackRock, Inc. | $100K | 303K | ▼−3.1% Reduced · −10K sh | Q1 2026 | |
| 16 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $65K | 196K | ▲Added Added · +196K sh | Q1 2026 | |
| 17 | TWO SIGMA INVESTMENTS, LP | $62K | 188K | ▼−64% Reduced · −337K sh | Q1 2026 | |
| 18 | ADAR1 Capital Management, LLC | $50K | 150K | —Held | Q1 2026 | |
| 19 | JANE STREET GROUP, LLC | $46K | 140K | ▼−61% Reduced · −216K sh | Q1 2026 | |
| 20 | STATE STREET CORP | $43K | 135K | ▲+1.0% Added · +1K sh | Q2 2026 | |
| 21 | James J. Burns & Company, LLC | $30K | 95K | ▲New +95K sh | Q2 2026 | |
| 22 | Quarry LP | $30K | 94K | ▲New +94K sh | Q2 2026 | |
| 23 | XTX Topco Ltd | $28K | 84K | ▲New +84K sh | Q1 2026 | |
| 24 | Clear Harbor Asset Management, LLC | $159K | 77K | ▲+83% Added · +35K sh | Q3 2025 | |
| 25 | JMN Financial LLC | $24K | 77K | ▲New +77K sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 12 funds opened a new position in MREO and 5 added to an existing one, while 6 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| ELI LILLY & COLLY | 24 funds | $1.2B |
| MICRON TECHNOLOGY INCMU | 23 funds | $2.7B |
| ADVANCED MICRO DEVICESAMD | 23 funds | $1.6B |
| NVIDIA CORPNVDA | 22 funds | $8.2B |
| ALPHABET INC-CL AGOOGL | 22 funds | $3.6B |
| UNITEDHEALTH GROUP INCUNH | 22 funds | $1.7B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 22 funds | $1.5B |
| COSTCO WHOLESALE CORPCOST | 22 funds | $1.4B |
| APPLE INCAAPL | 21 funds | $6.9B |
| AMAZON.COM INCAMZN | 21 funds | $4.5B |
| MICROSOFT CORPMSFT | 21 funds | $3.7B |
| META PLATFORMS INC-CLASS AMETA | 21 funds | $2.6B |
Ranked by how many of MREO's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Sep 13, 2024 | Hughes-Wilson Alexandra | See Remarks | Sell (S) | 84K | $355K |
| Sep 13, 2024 | Hughes-Wilson Alexandra | See Remarks | Sell (S) | 16K | $69K |
| Sep 13, 2024 | Fox Christine Ann | Chief Financial Officer | Sell (S) | 19K | $81K |
| Sep 13, 2024 | Sermon Charles | General Counsel | Sell (S) | 21K | $88K |
| Sep 13, 2024 | Lewicki John A. | Chief Scientific Officer | Sell (S) | 11K | $46K |
| Sep 13, 2024 | Scots-Knight Denise | Chief Executive Officer, Director | Sell (S) | 60K | $253K |
| Sep 12, 2024 | Hughes-Wilson Alexandra | See Remarks | Sell (S) | 40K | $179K |
| Sep 12, 2024 | Hughes-Wilson Alexandra | See Remarks | Sell (S) | 8K | $35K |
| Sep 12, 2024 | Fox Christine Ann | Chief Financial Officer | Sell (S) | 9K | $41K |
| Sep 12, 2024 | Sermon Charles | General Counsel | Sell (S) | 10K | $45K |
| Sep 12, 2024 | Lewicki John A. | Chief Scientific Officer | Sell (S) | 5K | $23K |
| Sep 12, 2024 | Scots-Knight Denise | Chief Executive Officer, Director | Sell (S) | 29K | $128K |
Connected entities for MREO
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MREO/capital-change-brief"
Use Arkolith's capital_change_brief for MREO. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MREO. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.