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/MDLN/capital-change-brief"
Use Arkolith's capital_change_brief for MDLN. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | H&F Corporate Investors X, Ltd. | $3.8B | 86.5M | ▼−13% Reduced · −13.0M sh | Q1 2026 | |
| 2 | FMR LLC | $1.6B | 36.6M | ▲+39% Added · +10.2M sh | Q1 2026 | |
| 3 | BlackRock, Inc. | $753.1M | 16.9M | ▲+47% Added · +5.4M sh | Q1 2026 | |
| 4 | MORGAN STANLEY | $698.8M | 15.7M | ▲+3.6% Added · +541K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $655.5M | 14.7M | ▲New +14.7M sh | Q1 2026 | |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | $629.7M | 14.2M | ▲New +14.2M sh | Q1 2026 | |
| 7 | LONE PINE CAPITAL LLC | $524.6M | 11.8M | ▲+0.6% Added · +72K sh | Q1 2026 | |
| 8 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $518.1M | 11.6M | ▲+13% Added · +1.3M sh | Q1 2026 | |
| 9 | JANUS HENDERSON GROUP PLC | $506.5M | 11.5M | ▲+8.4% Added · +887K sh | Q1 2026 | |
| 10 | VIKING GLOBAL INVESTORS LP | $508.8M | 11.4M | ▲+64% Added · +4.5M sh | Q1 2026 | |
| 11 | BAILLIE GIFFORD & CO | $443.9M | 10.0M | ▼−4.2% Reduced · −435K sh | Q1 2026 | |
| 12 | CANADA PENSION PLAN INVESTMENT BOARD | $416.4M | 9.4M | ▼−1.5% Reduced · −143K sh | Q1 2026 | |
| 13 | Artisan Partners Limited Partnership | $295.0M | 6.6M | ▲+44% Added · +2.0M sh | Q1 2026 | |
| 14 | GEODE CAPITAL MANAGEMENT, LLC | $278.6M | 6.3M | ▲+112% Added · +3.3M sh | Q1 2026 | |
| 15 | SurgoCap Partners LP | $270.3M | 6.1M | ▲New +6.1M sh | Q1 2026 | |
| 16 | PRICE T ROWE ASSOCIATES INC /MD/ | $249.7M | 5.6M | ▼−23% Reduced · −1.7M sh | Q1 2026 | |
| 17 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $222.5M | 5.0M | ▲+233% Added · +3.5M sh | Q1 2026 | |
| 18 | NORGES BANK | $210.0M | 5.0M | ▲New +5.0M sh | Q4 2025 | |
| 19 | STATE STREET CORP | $214.6M | 4.8M | ▲+383% Added · +3.8M sh | Q1 2026 | |
| 20 | Ghisallo Capital Management LLC | $202.3M | 4.5M | ▲+405% Added · +3.6M sh | Q1 2026 | |
| 21 | DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt | $195.1M | 4.4M | ▲+20% Added · +725K sh | Q1 2026 | |
| 22 | Egerton Capital (UK) LLP | $194.3M | 4.4M | ▲New +4.4M sh | Q1 2026 | |
| 23 | Point72 Asset Management, L.P. | $147.0M | 3.3M | ▲+271% Added · +2.4M sh | Q1 2026 | |
| 24 | UBS Group AG | $142.0M | 3.2M | ▲+145% Added · +1.9M sh | Q1 2026 | |
| 25 | Alyeska Investment Group, L.P. | $130.7M | 2.9M | ▲+145% Added · +1.7M sh | 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 |
|---|---|---|---|---|---|
| Jun 16, 2026 | Golwas Douglas P | Chief Commercial Officer, 10% Owner | Option exercise (M) | 100K | — |
| Jun 16, 2026 | Golwas Douglas P | Chief Commercial Officer, 10% Owner | Sell (S) | 62K | $2.3M |
| Jun 16, 2026 | Golwas Douglas P | Chief Commercial Officer, 10% Owner | Sell (S) | 38K | $1.4M |
| Jun 16, 2026 | Golwas Douglas P | Chief Commercial Officer, 10% Owner | Disposed to issuer (D) | 100K | — |
| Jun 16, 2026 | Golwas Douglas P | Chief Commercial Officer, 10% Owner | Option exercise (M) | 100K | $0 |
| Jun 15, 2026 | Drazin Michael B | Chief Financial Officer | Tax withholding (F) | 2K | $69K |
| Jun 15, 2026 | Shryock Christopher P | Chief Human Resources Officer | Tax withholding (F) | 872 | $32K |
| Jun 15, 2026 | Boyle James M | Chief Executive Officer, Director | Tax withholding (F) | 2K | $87K |
| Jun 15, 2026 | Golwas Douglas P | Chief Commercial Officer, 10% Owner | Tax withholding (F) | 2K | $69K |
| Jun 15, 2026 | Miller Stephen L | Chief Operating Officer | Tax withholding (F) | 2K | $69K |
| Jun 15, 2026 | Liberman Alexander M. | Chief Legal Officer | Tax withholding (F) | 872 | $32K |
| Jun 15, 2026 | Laabs Amanda H. | Chief Product Officer | Tax withholding (F) | 2K | $69K |
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 104 funds | $57.6B |
| MICROSOFT CORPMSFT | 104 funds | $39.4B |
| AMAZON.COM INCAMZN | 104 funds | $37.7B |
| META PLATFORMS INC-CLASS AMETA | 100 funds | $17.8B |
| ALPHABET INC-CL AGOOGL | 99 funds | $28.6B |
| BOSTON SCIENTIFIC CORPBSX | 97 funds | $3.2B |
| BROADCOM INCAVGO | 95 funds | $20.0B |
| ADVANCED MICRO DEVICESAMD | 95 funds | $5.8B |
| VISA INC-CLASS A SHARESV | 93 funds | $13.5B |
| JPMORGAN CHASE & COJPM | 92 funds | $14.6B |
| MASTERCARD INC - AMA | 92 funds | $7.7B |
| BANK OF AMERICA CORPBAC | 92 funds | $4.7B |
Ranked by how many of MDLN'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 MDLN. 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.