Among active 13F managers last quarter, 9 opened and 28 added, while 7 reduced; the largest holder to move was Zimmer Partners, LP (+0.7%). No open-market insider trades in the last 180 days.
Funds lean in and no leg opposes.
110 tracked 13F filers disclose a position in JRVR as of the latest SEC 13F filings, a combined $129.6M 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 | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Zimmer Partners, LP | 4.6M | $20.3M | ▲+0.7% Added · +32K sh | Q2 2026 | |
| 2 | T. Rowe Price Investment Management, Inc. | 4.6M | Withheld | ▲+2.5% Added · +111K sh | Q2 2026 | |
| 3 | BlackRock, Inc. | 3.4M | $14.9M | ▲+8.1% Added · +254K sh | Q2 2026 | |
| 4 | Enstar Group LTD | 2.6M | $11.3M | —Held | Q2 2026 | |
| 5 | Donald Smith & Co., Inc. | 2.4M | $10.7M | ▲+34% Added · +619K sh | Q2 2026 | |
| 6 | Vanguard Capital Management LLC | 1.7M | $7.6M | ▼−0.1% Reduced · −2K sh | Q2 2026 | |
| 7 | Geode Capital Management, LLC | 1.1M | $4.9M | ▲+9.3% Added · +94K sh | Q2 2026 | |
| 8 | Discovery Capital Management, LLC / CT | 1.1M | $4.7M | ▲+29% Added · +240K sh | Q2 2026 | |
| 9 | Boston Partners | 847K | $5.3M | ▲+4.1% Added · +34K sh | Q1 2026 | |
| 10 | Dimensional Fund Advisors LP | 845K | $5.3M | ▲+9.5% Added · +73K sh | Q1 2026 | |
| 11 | State Street Corp | 828K | $3.6M | ▲+0.3% Added · +2K sh | Q2 2026 | |
| 12 | Morgan Stanley | 575K | $3.6M | ▼−3.0% Reduced · −18K sh | Q1 2026 | |
| 13 | Kennedy Capital Management LLC | 502K | $3.2M | ▲+2.3% Added · +11K sh | Q1 2026 | |
| 14 | Hillsdale Investment Management Inc. | 449K | $2.8M | ▲+46% Added · +140K sh | Q1 2026 | |
| 15 | Price T Rowe Associates Inc | 377K | $1.7M | ▲+3.3% Added · +12K sh | Q2 2026 | |
| 16 | Two Sigma Investments, LP | 364K | $2.3M | ▲+37% Added · +98K sh | Q1 2026 | |
| 17 | Charles Schwab Investment Management Inc | 354K | $2.2M | ▼−2.3% Reduced · −8K sh | Q1 2026 | |
| 18 | AQR Capital Management LLC | 344K | $2.2M | ▼−10% Reduced · −39K sh | Q1 2026 | |
| 19 | Jacobs Levy Equity Management, Inc | 324K | $1.4M | ▼−7.2% Reduced · −25K sh | Q2 2026 | |
| 20 | Northern Trust Corp | 321K | $2.0M | ▲+7.2% Added · +22K sh | Q1 2026 | |
| 21 | Vanguard Portfolio Management LLC | 310K | $1.4M | ▲+11% Added · +32K sh | Q2 2026 | |
| 22 | Vanguard Fiduciary Trust Co | 299K | $1.3M | ▲+5.3% Added · +15K sh | Q2 2026 | |
| 23 | Flax Pond Capital, LLC | 294K | $1.3M | ▲21× Added · +280K sh | Q2 2026 | |
| 24 | Goldman Sachs Group Inc | 275K | $1.7M | ▲+23% Added · +52K sh | Q1 2026 | |
| 25 | D. E. Shaw & Co., Inc. | 184K | $1.2M | ▼−57% Reduced · −243K 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. 1 value row is withheld because the reported units disagree with same-security peers; share counts are unchanged.
Last quarter, 9 funds opened a new position in JRVR and 28 added to an existing one, while 7 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 |
|---|---|---|
| JPMorgan Chase & CoJPM | 50 funds | $34.0B |
| Microsoft CorpMSFT | 49 funds | $127.3B |
| Nvidia CorpNVDA | 48 funds | $210.5B |
| Alphabet Inc-CL AGOOGL | 48 funds | $89.8B |
| Eli Lilly & CoLLY | 48 funds | $43.5B |
| Micron Technology IncMU | 48 funds | $31.2B |
| Lam Research CorpLRCX | 48 funds | $23.2B |
| Amazon.com IncAMZN | 47 funds | $96.4B |
| Visa Inc-Class A SharesV | 47 funds | $32.7B |
| Advanced Micro DevicesAMD | 47 funds | $31.2B |
| Unitedhealth Group IncUNH | 47 funds | $19.2B |
| Costco Wholesale CorpCOST | 47 funds | $18.4B |
Ranked by how many of JRVR's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in JRVR.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 2, 2025 | Sutherland Todd Randell | President, E&S Lines Segment | Buy (P) | 17K | $100K |
| May 20, 2025 | Migliorato Peter B. | Director | Buy (P) | 19K | $101K |
| May 19, 2025 | LaSala Christine | Director | Buy (P) | 29K | $152K |
| May 15, 2025 | D'Orazio Frank | Chief Executive Officer, Director | Buy (P) | 100K | $475K |
| Nov 4, 2022 | Gould Kirstin | Director | Buy (P) | 3K | $69K |
| Nov 4, 2022 | Brown Thomas Lynn | Director | Buy (P) | 2K | $46K |
| Mar 11, 2022 | Roberts Patricia H | Director | Buy (P) | 1K | $25K |
| Mar 10, 2022 | Sherman Ollie L. Jr. | Director | Buy (P) | 5K | $103K |
| Mar 10, 2022 | Cowell Janet Raye | Director | Buy (P) | 915 | $20K |
| Mar 4, 2022 | Srinivasan Sundar | Director | Buy (P) | 6K | $125K |
| Mar 4, 2022 | Romann Gould Kirstin | Director | Buy (P) 2 lots, same day | 4K | $85K |
| Mar 4, 2022 | Brown Thomas Lynn | Director | Buy (P) | 2K | $40K |
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 | 48 | 25 | – |
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 JRVR
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/JRVR/capital-change-brief"
Use Arkolith's capital_change_brief for JRVR. 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 JRVR. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.