Among active 13F managers last quarter, 1 opened and 3 added, while 1 reduced; the largest holder to move was Citadel Advisors LLC (+12%). No open-market insider trades in the last 180 days.
Funds lean in and no leg opposes.
22 tracked 13F filers disclose a position in MBIO as of the latest SEC 13F filings, a combined $360K 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 | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Kestra Advisory Services, LLC | 197K | $138K | ▲+12% Added · +21K sh | Q2 2026 | |
| 2 | BlackRock, Inc. | 85K | $59K | —Held | Q2 2026 | |
| 3 | Citadel Advisors LLC | 59K | $42K | ▲+12% Added · +6K sh | Q2 2026 | |
| 4 | Geode Capital Management, LLC | 42K | $30K | ▼−54% Reduced · −51K sh | Q2 2026 | |
| 5 | CFO4Life Group, LLC | 34K | $24K | ▲+64% Added · +13K sh | Q2 2026 | |
| 6 | Vanguard Fiduciary Trust Co | 32K | $23K | —Held | Q2 2026 | |
| 7 | Vanguard Capital Management LLC | 26K | $18K | —Held | Q2 2026 | |
| 8 | Two Sigma Investments, LP | 17K | $12K | ▼−58% Reduced · −23K sh | Q1 2026 | |
| 9 | Two Sigma Securities, LLC | 14K | $10K | ▲New +14K sh | Q2 2026 | |
| 10 | UBS Group AG | 4K | $3K | ▲83× Added · +4K sh | Q1 2026 | |
| 11 | Tower Research Capital LLC (TRC) | 2K | $1K | ▲+102% Added · +959 sh | Q1 2026 | |
| 12 | SBI Securities Co., Ltd. | 509 | $357 | —Held | Q2 2026 | |
| 13 | Morgan Stanley | 118 | $86 | ▼−23% Reduced · −35 sh | Q1 2026 | |
| 14 | Cullen/frost Bankers, Inc. | 13 | $9 | —Held | Q2 2026 | |
| 15 | BNP Paribas Financial Markets | 6 | $4 | —Held | Q1 2026 | |
| 16 | Lanark Financial, Inc. | 3 | $2 | —Held | Q2 2026 | |
| 17 | JPMorgan Chase & Co | 2 | $1 | —Held | Q1 2026 | |
| 18 | Osaic Holdings, Inc. | 2 | $1 | ▲New +2 sh | Q1 2026 | |
| 19 | Danske Bank A/s | 2 | $1 | —Held | Q2 2026 | |
| 20 | CWM, LLC | 2 | $1 | —Held | Q1 2026 | |
| 21 | Citigroup Inc | 1 | $1 | ▲New +1 sh | Q1 2026 | |
| 22 | Group One Trading LLC | 1 | $1 | —Held | 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, 1 fund opened a new position in MBIO and 3 added to an existing one, while 1 reduced. 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 | Their position there |
|---|---|---|
| Nvidia CorpNVDA | 8 funds | $5.2B |
| Alphabet Inc-CL AGOOGL | 8 funds | $2.8B |
| Microsoft CorpMSFT | 8 funds | $2.5B |
| Broadcom IncAVGO | 8 funds | $2.1B |
| Micron Technology IncMU | 8 funds | $1.7B |
| Costco Wholesale CorpCOST | 8 funds | $1.5B |
| Berkshire Hathaway Inc-CL BBRK/B | 8 funds | $1.4B |
| Eli Lilly & CoLLY | 8 funds | $1.4B |
| Advanced Micro DevicesAMD | 8 funds | $1.3B |
| BlackRock IncBLK | 8 funds | $1.3B |
| Meta Platforms Inc-Class AMETA | 8 funds | $1.3B |
| Palantir Technologies Inc-APLTR | 8 funds | $1.2B |
Ranked by how many of MBIO's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in MBIO.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Dec 30, 2025 | Jin David | Director | Buy (P) | 247 | $237 |
| Dec 30, 2025 | Chill Adam J. | Director | Sell (S) | 4 | $4 |
| Dec 30, 2025 | Herskowitz Neil | Director | Sell (S) | 247 | $237 |
| Sep 13, 2022 | Rosenwald Lindsay A Md | Director | Buy (P) | 5K | $3K |
| Sep 13, 2022 | Litchman Manuel MD | Director | Buy (P) | 5K | $3K |
| Mar 18, 2022 | Rosenwald Lindsay A Md | Director | Buy (P) | 4K | $3K |
| Mar 18, 2022 | Litchman Manuel MD | Director | Buy (P) | 5K | $4K |
| Dec 14, 2021 | Achenbach Brian | SVP, Fin. & Corp. Controller | Sell (S) | 4K | $8K |
| Oct 27, 2021 | Litchman Manuel MD | President and CEO, Director | Buy (P) | 65K | $146K |
| Oct 12, 2021 | Achenbach Brian | SVP, Fin. & Corp. Controller | Sell (S) | 4K | $10K |
| Jul 30, 2021 | Litchman Manuel MD | President and CEO, Director | Buy (P) | 86K | $251K |
| Apr 9, 2021 | Achenbach Brian | SVP, Fin. & Corp. Controller | Sell (S) | 2K | $8K |
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 5 | 3 | – |
Insiders Form 4 open-market | 0 | 0 | $0 |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for MBIO
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/MBIO/capital-change-brief"
Use Arkolith's capital_change_brief for MBIO. 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 MBIO. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.