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/MTSI/capital-change-brief"
Use Arkolith's capital_change_brief for MTSI. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | $2.4B | 10.6M | ▲+64% Added · +4.1M sh | Q1 2026 | |
| 2 | BlackRock, Inc. | $1.9B | 8.6M | ▲+14% Added · +1.0M sh | Q1 2026 | |
| 3 | T. Rowe Price Investment Management, Inc. | Withheld | 4.5M | ▼−17% Reduced · −914K sh | Q1 2026 | |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | $796.6M | 3.6M | ▲New +3.6M sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $664.6M | 3.0M | ▲New +3.0M sh | Q1 2026 | |
| 6 | STATE STREET CORP | $478.1M | 2.2M | ▲+1.6% Added · +34K sh | Q1 2026 | |
| 7 | JPMORGAN CHASE & CO | $422.3M | 2.0M | ▲+82% Added · +909K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $302.0M | 1.4M | ▲+7.3% Added · +92K sh | Q1 2026 | |
| 9 | Whale Rock Capital Management LLC | $260.9M | 1.2M | ▲+50% Added · +392K sh | Q1 2026 | |
| 10 | Artisan Partners Limited Partnership | $232.5M | 1.0M | ▼−16% Reduced · −200K sh | Q1 2026 | |
| 11 | Polar Capital Holdings Plc | $206.7M | 931K | ▲New +931K sh | Q1 2026 | |
| 12 | PRICE T ROWE ASSOCIATES INC /MD/ | $203.2M | 915K | ▼−53% Reduced · −1.0M sh | Q1 2026 | |
| 13 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $184.0M | 828K | ▲+77% Added · +361K sh | Q1 2026 | |
| 14 | UBS Group AG | $179.7M | 809K | ▼−11% Reduced · −100K sh | Q1 2026 | |
| 15 | ALLIANCEBERNSTEIN L.P. | $135.1M | 789K | ▼−26% Reduced · −274K sh | Q1 2026 | |
| 16 | Neuberger Berman Group LLC | $175.0M | 789K | ▲+19% Added · +123K sh | Q1 2026 | |
| 17 | JANUS HENDERSON GROUP PLC | $174.1M | 784K | ▲+15% Added · +105K sh | Q1 2026 | |
| 18 | BARCLAYS PLC | $163.1M | 735K | ▲+28% Added · +160K sh | Q1 2026 | |
| 19 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $146.8M | 661K | ▲+3.0% Added · +19K sh | Q1 2026 | |
| 20 | CITADEL ADVISORS LLC | $131.1M | 591K | ▲+344% Added · +457K sh | Q1 2026 | |
| 21 | RAYMOND JAMES FINANCIAL INC | $127.0M | 590K | ▼−2.0% Reduced · −12K sh | Q1 2026 | |
| 22 | NORGES BANK | $97.4M | 569K | ▼−28% Reduced · −227K sh | Q4 2025 | |
| 23 | MORGAN STANLEY | $123.3M | 555K | ▼−27% Reduced · −203K sh | Q1 2026 | |
| 24 | NORTHERN TRUST CORP | $118.3M | 533K | ▲+4.5% Added · +23K sh | Q1 2026 | |
| 25 | DIMENSIONAL FUND ADVISORS LP | $117.5M | 529K | ▼−44% Reduced · −418K 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 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 100 | $37K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 100 | $37K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 200 | $75K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 100 | $38K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 420 | $160K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 300 | $115K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 9 | $3K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 400 | $155K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 200 | $77K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 400 | $155K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 291 | $113K |
| Jun 25, 2026 | Hwang Donghyun Thomas | SVP, Global Sales | Sell (S) | 100 | $39K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 172 funds | $67.4B |
| ALPHABET INC-CL AGOOGL | 171 funds | $46.0B |
| NVIDIA CORPNVDA | 169 funds | $93.5B |
| APPLE INCAAPL | 169 funds | $75.2B |
| AMAZON.COM INCAMZN | 169 funds | $48.4B |
| META PLATFORMS INC-CLASS AMETA | 169 funds | $30.7B |
| BROADCOM INCAVGO | 167 funds | $37.4B |
| ELI LILLY & COLLY | 165 funds | $18.1B |
| TESLA INCTSLA | 165 funds | $17.7B |
| MASTERCARD INC - AMA | 165 funds | $13.3B |
| ALPHABET INC-CL CGOOG | 164 funds | $29.6B |
| VISA INC-CLASS A SHARESV | 164 funds | $14.0B |
Ranked by how many of MTSI'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 MTSI. 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.