44 tracked 13F filers disclose a position in ACIU as of the latest SEC 13F filings, a combined $68.6M 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 | BVF INC/IL | $54.5M | 19.8M | —Held | Q1 2026 | |
| 2 | WELLS FARGO & COMPANY/MN | $2.8M | 1.0M | ▼−0.2% Reduced · −2K sh | Q1 2026 | |
| 3 | MILLENNIUM MANAGEMENT LLC | $2.2M | 793K | ▼−15% Reduced · −141K sh | Q1 2026 | |
| 4 | RENAISSANCE TECHNOLOGIES LLC | $1.7M | 624K | ▼−6.7% Reduced · −45K sh | Q1 2026 | |
| 5 | BlackRock, Inc. | $1.4M | 524K | ▲+4.4% Added · +22K sh | Q1 2026 | |
| 6 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $1.1M | 406K | ▲+8.0% Added · +30K sh | Q1 2026 | |
| 7 | DIMENSIONAL FUND ADVISORS LP | $1.1M | 390K | ▲+83% Added · +177K sh | Q1 2026 | |
| 8 | NORTHERN TRUST CORP | $766K | 279K | ▼−1.2% Reduced · −3K sh | Q1 2026 | |
| 9 | CITADEL ADVISORS LLC | $735K | 267K | ▲+276% Added · +196K sh | Q1 2026 | |
| 10 | MARSHALL WACE, LLP | $362K | 131K | ▼−30% Reduced · −55K sh | Q1 2026 | |
| 11 | UBS Group AG | $279K | 102K | ▼−48% Reduced · −93K sh | Q1 2026 | |
| 12 | Deeter Investments LLP | $314K | 100K | ▲New +100K sh | Q4 2025 | |
| 13 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $245K | 89K | ▼−40% Reduced · −58K sh | Q1 2026 | |
| 14 | MORGAN STANLEY | $245K | 89K | ▼−5.4% Reduced · −5K sh | Q1 2026 | |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | $147K | 62K | ▼−2.7% Reduced · −2K sh | Q2 2026 | |
| 16 | JANE STREET GROUP, LLC | $159K | 58K | ▲+439% Added · +47K sh | Q1 2026 | |
| 17 | TWO SIGMA INVESTMENTS, LP | $108K | 39K | ▼−56% Reduced · −49K sh | Q1 2026 | |
| 18 | GOLDMAN SACHS GROUP INC | $59K | 22K | ▲+17% Added · +3K sh | Q1 2026 | |
| 19 | BANK OF AMERICA CORP /DE/ | $48K | 17K | ▼−19% Reduced · −4K sh | Q1 2026 | |
| 20 | China Universal Asset Management Co., Ltd. | $39K | 16K | ▼−9.3% Reduced · −2K sh | Q2 2026 | |
| 21 | XTX Topco Ltd | $39K | 14K | ▲New +14K sh | Q1 2026 | |
| 22 | Quadrature Capital Ltd | $31K | 13K | ▲New +13K sh | Q2 2026 | |
| 23 | Jump Financial, LLC | $31K | 11K | ▲New +11K sh | Q1 2026 | |
| 24 | AXQ CAPITAL, LP | $25K | 10K | ▲New +10K sh | Q2 2026 | |
| 25 | Quinn Opportunity Partners LLC | $28K | 10K | —Held | 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, 6 funds opened a new position in ACIU and 6 added to an existing one, while 7 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 |
|---|---|---|
| ALPHABET INC-CL AGOOGL | 21 funds | $11.0B |
| MICROSOFT CORPMSFT | 20 funds | $15.1B |
| MICRON TECHNOLOGY INCMU | 20 funds | $6.0B |
| ADVANCED MICRO DEVICESAMD | 20 funds | $2.9B |
| INTEL CORPINTC | 20 funds | $1.9B |
| SEAGATE TECHNOLOGY HOLDINGSSTX | 20 funds | $1.4B |
| XCEL ENERGY INCXEL | 20 funds | $401.2M |
| NVIDIA CORPNVDA | 19 funds | $19.9B |
| SANDISK CORPSNDK | 19 funds | $5.3B |
| ASML HOLDING NV-NY REG SHSASML | 19 funds | $4.1B |
| UNITEDHEALTH GROUP INCUNH | 19 funds | $3.1B |
| JPMORGAN CHASE & COJPM | 19 funds | $2.9B |
Ranked by how many of ACIU's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 15, 2026 | Pfeifer Andrea | Chief Executive Officer, Director | Sell (S) | 10K | $28K |
| Apr 15, 2026 | Pfeifer Andrea | Chief Executive Officer, Director | Sell (S) | 10K | $31K |
Connected entities for ACIU
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/ACIU/capital-change-brief"
Use Arkolith's capital_change_brief for ACIU. 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 ACIU. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.