12 tracked 13F filers disclose a position in AMBR as of the latest SEC 13F filings, a combined $464K 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 | Pantera Capital Partners LP | $226K | 96K | —Held | Q1 2026 | |
| 2 | XTX Topco Ltd | $65K | 27K | ▼−34% Reduced · −14K sh | Q1 2026 | |
| 3 | UBS Group AG | $63K | 27K | ▲+396% Added · +21K sh | Q1 2026 | |
| 4 | CITADEL ADVISORS LLC | $46K | 19K | ▼−62% Reduced · −32K sh | Q1 2026 | |
| 5 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $28K | 12K | ▼−57% Reduced · −16K sh | Q1 2026 | |
| 6 | TWO SIGMA INVESTMENTS, LP | $27K | 12K | —Held | Q1 2026 | |
| 7 | BlackRock, Inc. | $4K | 2K | ▼−41% Reduced · −1K sh | Q1 2026 | |
| 8 | RHUMBLINE ADVISERS | $2K | 1K | —Held | Q1 2026 | |
| 9 | Daiwa Securities Group Inc. | $944 | 400 | ▲New +400 sh | Q1 2026 | |
| 10 | SIMPLEX TRADING, LLC | $814 | 345 | ▼−98% Reduced · −19K sh | Q1 2026 | |
| 11 | SBI Securities Co., Ltd. | $550 | 233 | ▲+133% Added · +133 sh | Q1 2026 | |
| 12 | MORGAN STANLEY | $172 | 73 | ▼−100% Reduced · −26K 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, 0 funds opened a new position in AMBR and 1 added to an existing one, while 2 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 | 4 funds | $11.6B |
| MICROSOFT CORPMSFT | 4 funds | $4.3B |
| APPLE INCAAPL | 4 funds | $4.2B |
| AMAZON.COM INCAMZN | 4 funds | $3.9B |
| ALPHABET INC-CL AGOOGL | 4 funds | $3.0B |
| META PLATFORMS INC-CLASS AMETA | 4 funds | $2.8B |
| BROADCOM INCAVGO | 4 funds | $2.5B |
| ALPHABET INC-CL CGOOG | 4 funds | $1.9B |
| PALANTIR TECHNOLOGIES INC-APLTR | 4 funds | $1.6B |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 4 funds | $1.4B |
| ADVANCED MICRO DEVICESAMD | 4 funds | $1.4B |
| TESLA INCTSLA | 4 funds | $1.2B |
Ranked by how many of AMBR's institutional holders also hold each name, a cross-fund conviction signal.
No open-market insider transactions on file yet. Grants, gifts, and exercises live on the full insider page.
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/AMBR/capital-change-brief"
Use Arkolith's capital_change_brief for AMBR. 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 AMBR. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.