Among active 13F managers last quarter, 4 opened and 1 added, while 1 reduced; the largest holder to move was Citadel Advisors LLC (new position). No open-market insider trades in the last 180 days.
Funds lean in and no leg opposes.
16 tracked 13F filers disclose a position in GRDX as of the latest SEC 13F filings, a combined $2.1M 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 | Renaissance Technologies LLC | 184K | $371K | ▲+493% Added · +153K sh | Q1 2026 | |
| 2 | Citadel Advisors LLC | 85K | $400K | ▲New +85K sh | Q2 2026 | |
| 3 | Federation des caisses Desjardins du Quebec | 76K | $358K | ▲+60% Added · +29K sh | Q2 2026 | |
| 4 | Vanguard Capital Management LLC | 74K | $347K | ▲+305% Added · +56K sh | Q2 2026 | |
| 5 | Geode Capital Management, LLC | 60K | $281K | ▲+80% Added · +27K sh | Q2 2026 | |
| 6 | Vanguard Fiduciary Trust Co | 34K | $159K | ▲+107% Added · +17K sh | Q2 2026 | |
| 7 | State Street Corp | 23K | $110K | —Held | Q2 2026 | |
| 8 | Jane Street Group, LLC | 13K | $26K | ▲New +13K sh | Q1 2026 | |
| 9 | Harbour Investments, Inc. | 8K | $16K | ▲New +8K sh | Q1 2026 | |
| 10 | UBS Group AG | 3K | $6K | ▲+495% Added · +3K sh | Q1 2026 | |
| 11 | Tower Research Capital LLC (TRC) | 1K | $3K | ▲New +1K sh | Q1 2026 | |
| 12 | SBI Securities Co., Ltd. | 31 | $145 | ▼−94% Reduced · −473 sh | Q2 2026 | |
| 13 | Caitong International Asset Management Co., Ltd | 21 | $98 | ▲New +21 sh | Q2 2026 | |
| 14 | Danske Bank A/s | 1 | $5 | —Held | Q2 2026 | |
| 15 | Citigroup Inc | 1 | $2 | ▼−100% Reduced · −2K sh | Q1 2026 | |
| 16 | Osaic Holdings, Inc. | 1 | $2 | —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, 4 funds opened a new position in GRDX and 1 added to an existing one, 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 |
|---|---|---|
| Nvidia CorpNVDA | 6 funds | $3.4B |
| Apple IncAAPL | 6 funds | $3.3B |
| Micron Technology IncMU | 6 funds | $1.7B |
| Alphabet Inc-CL AGOOGL | 6 funds | $1.4B |
| Eli Lilly & CoLLY | 6 funds | $1.3B |
| United Therapeutics CorpUTHR | 6 funds | $1.2B |
| Alphabet Inc-CL CGOOG | 6 funds | $1.1B |
| Advanced Micro DevicesAMD | 6 funds | $1.1B |
| Chevron CorpCVX | 6 funds | $1.0B |
| Intel CorpINTC | 6 funds | $989.8M |
| JPMorgan Chase & CoJPM | 6 funds | $983.4M |
| Abbott LaboratoriesABT | 6 funds | $932.8M |
Ranked by how many of GRDX's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in GRDX.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jan 6, 2025 | Romano Sarah | Chief Financial Officer | Sell (S) | 727 | $465 |
| Oct 9, 2024 | Romano Sarah | Chief Financial Officer | Sell (S) | 476 | $214 |
| Jul 2, 2024 | Sapirstein James | Chairman and CEO, Director | Sell (S) | 1K | $1K |
| Jul 2, 2024 | Romano Sarah | Chief Financial Officer | Sell (S) | 621 | $664 |
| Apr 1, 2024 | Romano Sarah | Chief Financial Officer | Sell (S) | 75 | $317 |
| Apr 1, 2024 | Sapirstein James | Chairman and CEO, Director | Sell (S) | 174 | $736 |
| Mar 15, 2024 | Romano Sarah | Chief Financial Officer | Sell (S) | 1K | $6K |
| Mar 15, 2024 | Sapirstein James | Chairman and CEO, Director | Sell (S) | 2K | $9K |
| Jan 12, 2024 | Sapirstein James | Chairman, President and CEO, Director | Sell (S) | 166 | $697 |
| Jan 12, 2024 | Romano Sarah | Chief Financial Officer | Sell (S) | 98 | $412 |
| Oct 4, 2023 | Sapirstein James | President and CEO, Director | Sell (S) | 3K | $802 |
| Oct 4, 2023 | Romano Sarah | Chief Financial Officer | Sell (S) | 2K | $486 |
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 | 6 | 2 | – |
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 GRDX
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/GRDX/capital-change-brief"
Use Arkolith's capital_change_brief for GRDX. 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 GRDX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.