Among active 13F managers last quarter, 1 added and none reduced or exited; the largest holder to move was SBI Securities Co., Ltd. (11× the prior stake). No open-market insider trades in the last 180 days.
Funds lean in and no leg opposes.
6 tracked 13F filers disclose a position in ARBK as of the latest SEC 13F filings, a combined $148K 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 | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Susquehanna International Group, LLP | 48K | $137K | ▲+51% Added · +16K sh | Q1 2026 | |
| 2 | Morgan Stanley | 3K | $8K | ▼−33% Reduced · −1K sh | Q1 2026 | |
| 3 | Rhumbline Advisers | 749 | $2K | ▲10× Added · +675 sh | Q1 2026 | |
| 4 | UBS Group AG | 403 | $1K | ▲New +403 sh | Q1 2026 | |
| 5 | SBI Securities Co., Ltd. | 68 | $258 | ▲11× Added · +62 sh | Q2 2026 | |
| 6 | Farther Finance Advisors, LLC | 1 | $3 | —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, 1 fund added to an existing position in ARBK, while none reduced or exited. 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 | Their position there |
|---|---|---|
| Nvidia CorpNVDA | 2 funds | $699.2M |
| Ishares Core S&P 500 ETFIVV | 2 funds | $581.7M |
| Vanguard S&P 500 ETFVOO | 2 funds | $518.5M |
| Apple IncAAPL | 2 funds | $398.4M |
| Vanguard Total Stock MKT ETFVTI | 2 funds | $285.3M |
| Invesco QQQ Trust Series 1QQQ | 2 funds | $230.5M |
| Vanguard Ftse Developed ETFVEA | 2 funds | $224.4M |
| Alphabet Inc-CL AGOOGL | 2 funds | $195.1M |
| Amazon.com IncAMZN | 2 funds | $192.9M |
| Microsoft CorpMSFT | 2 funds | $191.6M |
| Tesla IncTSLA | 2 funds | $151.5M |
| Micron Technology IncMU | 2 funds | $148.4M |
Ranked by how many of ARBK's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in ARBK.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jan 13, 2011 | Lobel Joshua A. | 10% Owner | Buy (P) 2 lots, same day | 7K | $61K |
| Jan 12, 2011 | Lobel Joshua A. | 10% Owner | Buy (P) | 10K | $92K |
| Jan 11, 2011 | Edidin Eric J | 10% Owner | Buy (P) 3 lots, same day | 59K | $557K |
| Jan 10, 2011 | Edidin Eric J | 10% Owner | Buy (P) 2 lots, same day | 3K | $24K |
| Jan 5, 2011 | Lobel Joshua A. | 10% Owner | Buy (P) 2 lots, same day | 3K | $25K |
| Jan 4, 2011 | Lobel Joshua A. | 10% Owner | Buy (P) | 21K | $172K |
| Dec 31, 2010 | Archer Capital Management, L.P. | 10% Owner | Buy (P) | 400 | $3K |
| Dec 30, 2010 | Edidin Eric J | 10% Owner | Buy (P) | 700 | $6K |
| Dec 29, 2010 | Edidin Eric J | 10% Owner | Buy (P) | 1K | $11K |
| Dec 27, 2010 | Canton Holdings, L.L.C. | 10% Owner | Buy (P) | 124 | $966 |
| Dec 17, 2010 | Archer Capital Management, L.P. | 10% Owner | Buy (P) 2 lots, same day | 22K | $177K |
| Dec 16, 2010 | Canton Holdings, L.L.C. | 10% Owner | Buy (P) 2 lots, same day | 32K | $258K |
One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 3 | 1 | – |
Insiders Form 4 open-market | 0 | 0 | $0 |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for ARBK
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/ARBK/capital-change-brief"
Use Arkolith's capital_change_brief for ARBK. 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 ARBK. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.