250 tracked 13F filers disclose a position in XMTR as of the latest SEC 13F filings, a combined $2.7B 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 | PRIMECAP MANAGEMENT CO/CA/ | $265.3M | 6.5M | ▲+14% Added · +813K sh | Q1 2026 | |
| 2 | BlackRock, Inc. | $142.9M | 3.5M | ▲+1.1% Added · +36K sh | Q1 2026 | |
| 3 | FMR LLC | $128.1M | 3.1M | ▲+21% Added · +543K sh | Q1 2026 | |
| 4 | EVENTIDE ASSET MANAGEMENT, LLC | $120.8M | 3.0M | ▲+0.8% Added · +24K sh | Q1 2026 | |
| 5 | AMERIPRISE FINANCIAL INC | $83.3M | 2.0M | ▼−11% Reduced · −254K sh | Q1 2026 | |
| 6 | Hood River Capital Management LLC | $191.9M | 2.0M | ▲+77% Added · +864K sh | Q2 2026 | |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | $81.0M | 2.0M | →First observed position No prior filed position | Q1 2026 | |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | $80.9M | 2.0M | →First observed position No prior filed position | Q1 2026 | |
| 9 | FIRST TRUST ADVISORS LP | $64.3M | 1.6M | ▼−0.1% Reduced · −874 sh | Q1 2026 | |
| 10 | FULLER & THALER ASSET MANAGEMENT, INC. | $138.1M | 1.4M | ▲+6.8% Added · +91K sh | Q2 2026 | |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | $118.2M | 1.2M | ▲+12% Added · +130K sh | Q2 2026 | |
| 12 | BAILLIE GIFFORD & CO | $45.9M | 1.1M | ▼−14% Reduced · −183K sh | Q1 2026 | |
| 13 | STATE STREET CORP | $106.6M | 1.1M | ▲+13% Added · +123K sh | Q2 2026 | |
| 14 | SIEMENS AG | $101.3M | 1.0M | ▲New +1.0M sh | Q2 2026 | |
| 15 | GILDER GAGNON HOWE & CO LLC | $82.7M | 857K | ▼−7.0% Reduced · −64K sh | Q2 2026 | |
| 16 | Stephens Investment Management Group LLC | $77.1M | 799K | ▲+2.6% Added · +20K sh | Q2 2026 | |
| 17 | NEXT CENTURY GROWTH INVESTORS LLC | $69.8M | 723K | ▼−8.1% Reduced · −64K sh | Q2 2026 | |
| 18 | Clearbridge Investments, LLC | $28.9M | 708K | ▼~0% Reduced · −252 sh | Q1 2026 | |
| 19 | Allspring Global Investments Holdings, LLC | $61.6M | 644K | ▼−7.3% Reduced · −51K sh | Q2 2026 | |
| 20 | FRED ALGER MANAGEMENT, LLC | $24.6M | 603K | ▲+3.9% Added · +23K sh | Q1 2026 | |
| 21 | JPMORGAN CHASE & CO | $21.5M | 576K | ▲15× Added · +538K sh | Q1 2026 | |
| 22 | JANE STREET GROUP, LLC | $20.7M | 507K | ▲+138% Added · +294K sh | Q1 2026 | |
| 23 | SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | $45.3M | 469K | ▼−34% Reduced · −241K sh | Q2 2026 | |
| 24 | UBS Group AG | $17.2M | 422K | ▲+64% Added · +164K sh | Q1 2026 | |
| 25 | NORTHERN TRUST CORP | $16.4M | 402K | ▲+2.9% Added · +11K 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, 12 funds opened a new position in XMTR and 24 added to an existing one, while 25 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 |
|---|---|---|
| AMAZON.COM INCAMZN | 139 funds | $149.2B |
| NVIDIA CORPNVDA | 136 funds | $302.5B |
| MICROSOFT CORPMSFT | 135 funds | $196.7B |
| META PLATFORMS INC-CLASS AMETA | 135 funds | $85.6B |
| BROADCOM INCAVGO | 132 funds | $117.6B |
| APPLE INCAAPL | 131 funds | $212.6B |
| ALPHABET INC-CL AGOOGL | 130 funds | $118.2B |
| ADVANCED MICRO DEVICESAMD | 130 funds | $27.9B |
| ELI LILLY & COLLY | 129 funds | $65.9B |
| MICRON TECHNOLOGY INCMU | 127 funds | $34.8B |
| TESLA INCTSLA | 125 funds | $53.3B |
| ALPHABET INC-CL CGOOG | 124 funds | $95.4B |
Ranked by how many of XMTR's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 31, 2026 | Weymouth Katharine | Director | Sell (S) | 5K | $476K |
| Aug 28, 2026 | Weymouth Katharine | Director | Sell (S) | 5K | $472K |
| Aug 27, 2026 | Raghavan Vaidyanathan | Chief Technology Officer | Sell (S) | 5K | $484K |
| Aug 19, 2026 | Rollins Emily | Director | Sell (S) | 768 | $66K |
| Aug 19, 2026 | Rollins Emily | Director | Sell (S) | 2K | $144K |
| Aug 19, 2026 | Rollins Emily | Director | Sell (S) | 3K | $212K |
| Aug 17, 2026 | Sahni Sanjeev Singh | Chief Executive Officer, Director | Sell (S) | 4 | $385 |
| Aug 17, 2026 | Sahni Sanjeev Singh | Chief Executive Officer, Director | Sell (S) | 325 | $30K |
| Aug 17, 2026 | Sahni Sanjeev Singh | Chief Executive Officer, Director | Sell (S) | 266 | $24K |
| Aug 17, 2026 | Sahni Sanjeev Singh | Chief Executive Officer, Director | Sell (S) | 523 | $47K |
| Aug 17, 2026 | Sahni Sanjeev Singh | Chief Executive Officer, Director | Sell (S) | 382 | $34K |
| Aug 11, 2026 | Rosati Fabio | Director | Sell (S) | 2K | $170K |
| Class | 13F holders | Value held |
|---|---|---|
| XMTRthis pagecs | 250 funds | $2.7B |
| XMTR 1 02/01/27SDBCV | 9 funds | $50.2M |
| 98423FAD1NOTE 0.750% 6/1 | 2 funds | $30.6M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for XMTR
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/XMTR/capital-change-brief"
Use Arkolith's capital_change_brief for XMTR. 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 XMTR. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.