551 tracked 13F filers disclose a position in MTSI as of the latest SEC 13F filings, a combined $14.5B 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 | 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 | →First observed position No prior filed position | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $664.6M | 3.0M | →First observed position No prior filed position | Q1 2026 | |
| 6 | STATE STREET CORP | $860.5M | 2.3M | ▲+5.1% Added · +109K sh | Q2 2026 | |
| 7 | JPMORGAN CHASE & CO | $422.3M | 2.0M | ▲+82% Added · +909K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $536.3M | 1.4M | ▲+3.7% Added · +50K sh | Q2 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 | PRICE T ROWE ASSOCIATES INC /MD/ | $203.2M | 915K | ▼−53% Reduced · −1.0M sh | Q1 2026 | |
| 12 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $184.0M | 828K | ▲+77% Added · +361K sh | Q1 2026 | |
| 13 | UBS Group AG | $179.7M | 809K | ▼−11% Reduced · −100K sh | Q1 2026 | |
| 14 | ALLIANCEBERNSTEIN L.P. | $135.1M | 789K | ▼−26% Reduced · −274K sh | Q1 2026 | |
| 15 | Neuberger Berman Group LLC | $175.0M | 789K | ▲+19% Added · +123K sh | Q1 2026 | |
| 16 | Janus Henderson Group Ltd. | $174.1M | 784K | ▲+15% Added · +105K sh | Q1 2026 | |
| 17 | Polar Capital Holdings Plc | $285.5M | 751K | ▼−19% Reduced · −180K sh | Q2 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 | Rafferty Asset Management, LLC | $240.7M | 633K | ▲+35% Added · +165K sh | Q2 2026 | |
| 21 | CITADEL ADVISORS LLC | $131.1M | 591K | ▲+344% Added · +457K sh | Q1 2026 | |
| 22 | RAYMOND JAMES FINANCIAL INC | $127.0M | 590K | ▼−2.0% Reduced · −12K sh | Q1 2026 | |
| 23 | NORGES BANK | $97.4M | 569K | ▼−28% Reduced · −227K sh | Q4 2025 | |
| 24 | MORGAN STANLEY | $123.3M | 555K | ▼−27% Reduced · −203K sh | Q1 2026 | |
| 25 | NORTHERN TRUST CORP | $118.3M | 533K | ▲+4.5% Added · +23K 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.
Last quarter, 3 funds opened a new position in MTSI and 20 added to an existing one, while 35 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 |
|---|---|---|
| NVIDIA CORPNVDA | 324 funds | $413.4B |
| MICROSOFT CORPMSFT | 320 funds | $280.0B |
| AMAZON.COM INCAMZN | 318 funds | $214.1B |
| ALPHABET INC-CL AGOOGL | 317 funds | $181.5B |
| META PLATFORMS INC-CLASS AMETA | 315 funds | $120.9B |
| APPLE INCAAPL | 311 funds | $300.8B |
| BROADCOM INCAVGO | 308 funds | $165.7B |
| ELI LILLY & COLLY | 307 funds | $79.8B |
| ADVANCED MICRO DEVICESAMD | 307 funds | $40.6B |
| MICRON TECHNOLOGY INCMU | 305 funds | $43.6B |
| APPLIED MATERIALS INCAMAT | 300 funds | $31.7B |
| ALPHABET INC-CL CGOOG | 299 funds | $126.6B |
Ranked by how many of MTSI's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 28, 2026 | Dennehy Robert | Senior VP and COO | Sell (S) | 252 | $69K |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell (S) | 400 | $132K |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell (S) | 300 | $99K |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell (S) | 2K | $526K |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell (S) | 2K | $557K |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell (S) | 500 | $163K |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell (S) | 900 | $293K |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell (S) | 400 | $130K |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell (S) | 2K | $510K |
| 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 |
| Class | 13F holders | Value held |
|---|---|---|
| MTSIthis pagecs | 551 funds | $14.5B |
| MTSI 0 12/15/29NOTE12/1 | 22 funds | $466.5M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for MTSI
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.
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.