Among active 13F managers last quarter, none opened or added and 1 reduced; the largest holder to move was Quarry LP (−78%). No recent Form 4 insider filings for BLRKU.
Funds lean out and no leg opposes.
15 tracked 13F filers disclose a position in BLRKU as of the latest SEC 13F filings, a combined $18.4M 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 | Millennium Management LLC | 600K | $6.0M | —Held | Q1 2026 | |
| 2 | LMR Partners LLP | 400K | $4.0M | —Held | Q2 2026 | |
| 3 | Westchester Capital Management, LLC | 250K | $2.5M | —Held | Q2 2026 | |
| 4 | Toronto Dominion Bank | 236K | $2.4M | ▼−6.2% Reduced · −16K sh | Q1 2026 | |
| 5 | Ghisallo Capital Management LLC | 100K | $1.0M | —Held | Q2 2026 | |
| 6 | Quarry LP | 50K | $506K | ▼−78% Reduced · −175K sh | Q2 2026 | |
| 7 | JPMorgan Chase & Co | 50K | $502K | —Held | Q1 2026 | |
| 8 | Cantor Fitzgerald, L. P. | 35K | $349K | ▼−0.6% Reduced · −200 sh | Q1 2026 | |
| 9 | Stoic Point Capital Management LLC | 25K | $253K | —Held | Q2 2026 | |
| 10 | Prelude Capital Management, LLC | 25K | $253K | —Held | Q2 2026 | |
| 11 | BlueCrest Capital Management Ltd | 25K | $252K | —Held | Q2 2026 | |
| 12 | Boothbay Fund Management, LLC | 22K | $226K | —Held | Q2 2026 | |
| 13 | Clear Street Group Inc. | 8K | $82K | ▲+34% Added · +2K sh | Q2 2026 | |
| 14 | Osaic Holdings, Inc. | 550 | $6K | ▲New +550 sh | Q1 2026 | |
| 15 | Healthcare Of Ontario Pension Plan Trust Fund | 2 | $20 | ▼−100% Reduced · −500K 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, no active manager opened or added to a position in BLRKU, while 1 reduced. 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 |
|---|---|---|
| Warner Bros Discovery IncWBD | 8 funds | $1.8B |
| Norfolk Southern CorpNSC | 7 funds | $1.8B |
| Electronic Arts IncEA | 7 funds | $1.1B |
| Terawulf IncWULF | 7 funds | $77.8M |
| Vishay Intertechnology IncVSH | 7 funds | $71.3M |
| Comcast Corp-Class ACMCSA | 7 funds | $67.2M |
| Meshflow Acquisition CorpMESHU | 7 funds | $18.0M |
| Activate Energy AcquisitionAEAQU | 7 funds | $17.9M |
| American Drive Acquisition CADACU | 7 funds | $17.5M |
| Nvidia CorpNVDA | 6 funds | $2.1B |
| Space Exploration Techn-CL ASPCX | 6 funds | $1.4B |
| Meta Platforms Inc-Class AMETA | 6 funds | $1.2B |
Ranked by how many of BLRKU's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in BLRKU.
No open-market insider transactions on file yet. Grants, gifts, and exercises live on the full insider page.
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 | 1 | 4 | – |
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.
| Class | 13F holders | Value held |
|---|---|---|
| BLRKUSD CL A ORD SHS | 45 funds | $121.6M |
| BLRKWWarrant | 38 funds | $1.8M |
| BLRKUthis pageUnit | 15 funds | $18.4M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
No filings captured for this ticker in the live stream yet.
Connected entities for BLRKU
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/BLRKU/capital-change-brief"
Use Arkolith's capital_change_brief for BLRKU. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + the live filing stream, joined for BLRKU. Filings are public domain, sourced to SEC EDGAR.