113 tracked 13F filers disclose a position in MASS as of the latest SEC 13F filings, a combined $180.5M 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 | First Light Asset Management, LLC | $37.2M | 6.1M | ▲+26% Added · +1.2M sh | Q1 2026 | |
| 2 | AWM Investment Company, Inc. | $31.8M | 5.2M | —Held | Q1 2026 | |
| 3 | ARK Investment Management LLC | $17.6M | 2.0M | ▲+4.2% Added · +81K sh | Q2 2026 | |
| 4 | BlackRock, Inc. | $10.8M | 1.8M | ▼−1.9% Reduced · −34K sh | Q1 2026 | |
| 5 | NEEDHAM INVESTMENT MANAGEMENT LLC | $7.6M | 1.2M | ▲+61% Added · +470K sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $6.8M | 1.1M | →First observed position No prior filed position | Q1 2026 | |
| 7 | First Eagle Investment Management, LLC | $8.1M | 930K | ▲+16% Added · +126K sh | Q2 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $6.6M | 762K | ▲+9.5% Added · +66K sh | Q2 2026 | |
| 9 | Granahan Investment Management, LLC | $4.3M | 695K | ▲+663% Added · +604K sh | Q1 2026 | |
| 10 | STATE STREET CORP | $5.3M | 607K | ▼−3.1% Reduced · −19K sh | Q2 2026 | |
| 11 | ESSEX INVESTMENT MANAGEMENT CO LLC | $4.1M | 470K | ▼−4.3% Reduced · −21K sh | Q2 2026 | |
| 12 | MORGAN STANLEY | $2.3M | 373K | ▼−15% Reduced · −67K sh | Q1 2026 | |
| 13 | PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. | $3.1M | 362K | —Held | Q2 2026 | |
| 14 | HighMark Wealth Management LLC | $3.0M | 340K | ▲+6.4% Added · +20K sh | Q2 2026 | |
| 15 | Sumitomo Mitsui Trust Group, Inc. | $1.7M | 270K | ▼−6.3% Reduced · −18K sh | Q1 2026 | |
| 16 | Amova Asset Management Americas, Inc. | $1.7M | 270K | ▼−6.3% Reduced · −18K sh | Q1 2026 | |
| 17 | NORTHERN TRUST CORP | $1.5M | 241K | ▲+4.8% Added · +11K sh | Q1 2026 | |
| 18 | GM Advisory Group, LLC | $1.5M | 238K | ▼−15% Reduced · −41K sh | Q1 2026 | |
| 19 | RENAISSANCE TECHNOLOGIES LLC | $1.4M | 230K | ▲+3.6% Added · +8K sh | Q1 2026 | |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.4M | 229K | ▼−4.7% Reduced · −11K sh | Q1 2026 | |
| 21 | Squarepoint Ops LLC | $1.3M | 213K | ▼−2.5% Reduced · −5K sh | Q1 2026 | |
| 22 | VANGUARD FIDUCIARY TRUST CO | $1.1M | 180K | →First observed position No prior filed position | Q1 2026 | |
| 23 | RAYMOND JAMES FINANCIAL INC | $1.1M | 177K | ▼−1.0% Reduced · −2K sh | Q1 2026 | |
| 24 | SEI INVESTMENTS CO | $1.0M | 165K | ▲+101% Added · +83K sh | Q1 2026 | |
| 25 | VANGUARD PORTFOLIO MANAGEMENT LLC | $1.0M | 164K | →First observed position No prior filed position | 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, 10 funds opened a new position in MASS and 20 added to an existing one, while 14 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 |
|---|---|---|
| MICROSOFT CORPMSFT | 55 funds | $131.4B |
| ALPHABET INC-CL AGOOGL | 54 funds | $70.9B |
| ELI LILLY & COLLY | 53 funds | $37.1B |
| NVIDIA CORPNVDA | 52 funds | $195.4B |
| APPLE INCAAPL | 52 funds | $148.1B |
| AMAZON.COM INCAMZN | 52 funds | $90.8B |
| UNITEDHEALTH GROUP INCUNH | 51 funds | $14.9B |
| BROADCOM INCAVGO | 50 funds | $75.5B |
| ALPHABET INC-CL CGOOG | 50 funds | $67.1B |
| META PLATFORMS INC-CLASS AMETA | 50 funds | $57.3B |
| LOCKHEED MARTIN CORPLMT | 50 funds | $4.6B |
| ADVANCED MICRO DEVICESAMD | 49 funds | $16.2B |
Ranked by how many of MASS's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Sep 2, 2026 | Brown Christopher D. | Director | Sell (S) | 30K | $317K |
| Aug 25, 2026 | Griffith Joseph H. IV | Chief Financial Officer | Sell (S) | 11K | $125K |
| Aug 21, 2026 | AWM Investment Company, Inc. | 10% Owner | Sell (S) | 42K | $441K |
| Aug 20, 2026 | AWM Investment Company, Inc. | 10% Owner | Sell (S) | 8K | $89K |
| Aug 17, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 20K | $207K |
| Aug 13, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 8K | $77K |
| Aug 12, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 3K | $28K |
| Aug 11, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 30K | $307K |
| Aug 11, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 116K | $1.1M |
| Aug 11, 2026 | Brown Christopher D. | Director | Sell (S) | 8K | $77K |
| Aug 10, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 348 | $3K |
| Aug 10, 2026 | Brown Christopher D. | Director | Sell (S) | 9K | $85K |
Connected entities for MASS
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/MASS/capital-change-brief"
Use Arkolith's capital_change_brief for MASS. 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 MASS. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.