94 tracked 13F filers disclose a position in MASS as of the latest SEC 13F filings, a combined $154.1M 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 | $11.9M | 1.9M | ▼−2.0% Reduced · −39K sh | Q1 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 | $4.9M | 804K | ▲+29% Added · +180K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $4.3M | 695K | ▲+1.0% Added · +7K sh | Q1 2026 | |
| 9 | Granahan Investment Management, LLC | $4.3M | 695K | ▲+663% Added · +604K sh | Q1 2026 | |
| 10 | STATE STREET CORP | $3.8M | 626K | ▲+5.0% Added · +30K sh | Q1 2026 | |
| 11 | MORGAN STANLEY | $2.3M | 373K | ▼−15% Reduced · −67K sh | Q1 2026 | |
| 12 | Sumitomo Mitsui Trust Group, Inc. | $1.7M | 270K | ▼−6.3% Reduced · −18K sh | Q1 2026 | |
| 13 | Amova Asset Management Americas, Inc. | $1.7M | 270K | ▼−6.3% Reduced · −18K sh | Q1 2026 | |
| 14 | NORTHERN TRUST CORP | $1.5M | 241K | ▲+4.8% Added · +11K sh | Q1 2026 | |
| 15 | GM Advisory Group, LLC | $1.5M | 238K | ▼−15% Reduced · −41K sh | Q1 2026 | |
| 16 | RENAISSANCE TECHNOLOGIES LLC | $1.4M | 230K | ▲+3.6% Added · +8K sh | Q1 2026 | |
| 17 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.4M | 229K | ▼−4.7% Reduced · −11K sh | Q1 2026 | |
| 18 | Squarepoint Ops LLC | $1.3M | 213K | ▼−2.5% Reduced · −5K sh | Q1 2026 | |
| 19 | VANGUARD FIDUCIARY TRUST CO | $1.1M | 180K | →First observed position No prior filed position | Q1 2026 | |
| 20 | RAYMOND JAMES FINANCIAL INC | $1.1M | 177K | ▼−1.0% Reduced · −2K sh | Q1 2026 | |
| 21 | SEI INVESTMENTS CO | $1.0M | 165K | ▲+101% Added · +83K sh | Q1 2026 | |
| 22 | VANGUARD PORTFOLIO MANAGEMENT LLC | $1.0M | 164K | →First observed position No prior filed position | Q1 2026 | |
| 23 | Russell Investments Group, Ltd. | $889K | 145K | ▲64× Added · +143K sh | Q1 2026 | |
| 24 | CITADEL ADVISORS LLC | $885K | 145K | ▼−45% Reduced · −120K sh | Q1 2026 | |
| 25 | MILLENNIUM MANAGEMENT LLC | $872K | 142K | ▼−9.9% Reduced · −16K 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, 7 funds opened a new position in MASS and 15 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 | 24 funds | $8.1B |
| META PLATFORMS INC-CLASS AMETA | 24 funds | $6.3B |
| AMAZON.COM INCAMZN | 23 funds | $7.2B |
| ALPHABET INC-CL AGOOGL | 23 funds | $5.5B |
| ORACLE CORPORCL | 23 funds | $2.5B |
| SALESFORCE INCCRM | 23 funds | $1.8B |
| COMCAST CORP-CLASS ACMCSA | 23 funds | $1.3B |
| UNITEDHEALTH GROUP INCUNH | 23 funds | $1.2B |
| HONEYWELL INTERNATIONAL INCHON | 23 funds | $532.9M |
| NVIDIA CORPNVDA | 22 funds | $13.2B |
| ALPHABET INC-CL CGOOG | 22 funds | $5.7B |
| BROADCOM INCAVGO | 22 funds | $5.3B |
Ranked by how many of MASS's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 2, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 222 | $2K |
| Jul 2, 2026 | Brown Christopher D. | Director | Sell (S) | 2K | $20K |
| Jun 30, 2026 | Brown Christopher D. | Director | Sell (S) | 20K | $177K |
| Jun 26, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 3K | $25K |
| Jun 25, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 16K | $149K |
| Jun 24, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 41K | $370K |
| Jun 23, 2026 | Knopp Kevin J. | President and CEO, Director | Sell (S) | 3K | $31K |
| Jun 23, 2026 | AWM Investment Company, Inc. | 10% Owner | Sell (S) | 3K | $27K |
| Jun 23, 2026 | Brown Christopher D. | Director | Sell (S) | 10K | $89K |
| Jun 22, 2026 | AWM Investment Company, Inc. | 10% Owner | Sell (S) | 5K | $42K |
| Jun 4, 2026 | AWM Investment Company, Inc. | 10% Owner | Sell (S) | 40K | $357K |
| Jun 4, 2026 | Brown Christopher D. | Director | Sell (S) | 100 | $900 |
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.