The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query MRSN owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MRSN"
Use Arkolith to show who owns MRSN, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | IFP Advisors, Inc | $87 | 3 | —Held | Q1 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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Tender (U) | 5K | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 6K | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 178 | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 3K | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 327 | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 4K | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 281 | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 4K | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 818 | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 6K | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 1K | — |
| Jan 6, 2026 | DeSchuytner Brian | SVP, COO & CFO | Disposed to issuer (D) | 9K | — |
| Company | Co-held by | Combined value |
|---|---|---|
| ELI LILLY & COLLY | 26 funds | $40.8B |
| UNITEDHEALTH GROUP INCUNH | 26 funds | $25.0B |
| THERMO FISHER SCIENTIFIC INCTMO | 26 funds | $18.0B |
| BOSTON SCIENTIFIC CORPBSX | 26 funds | $13.2B |
| INTUITIVE SURGICAL INCISRG | 26 funds | $11.5B |
| REGENERON PHARMACEUTICALSREGN | 26 funds | $5.9B |
| EDWARDS LIFESCIENCES CORPEW | 26 funds | $3.7B |
| DEXCOM INCDXCM | 26 funds | $2.4B |
| CORCEPT THERAPEUTICS INCCORT | 26 funds | $904.5M |
| AMICUS THERAPEUTICS INCAM6 | 26 funds | $259.2M |
| MICROSOFT CORPMSFT | 25 funds | $273.2B |
| AMAZON.COM INCAMZN | 25 funds | $144.7B |
Ranked by how many of MRSN's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MRSN. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.