CIK 1453381
Long positions in SEC Section 13(f) securities (US-listed stocks, ADRs and ETFs), largest first · Δ vs 2025-Q4. A lagged quarterly snapshot (filed ≤45 days after quarter-end); excludes shorts, options, cash, and shares listed only on non-US exchanges — foreign companies held via a US listing or ADR (e.g. Alibaba, TSMC) ARE included.
Firm-level facts as reported by the adviser on Form ADV Part 1A (latest filing 2026-03-31). Regulatory assets under management (RAUM) is Form ADV's gross figure and can differ from a 13F long book — it includes private-fund assets, leverage and non-13(f) securities. Titles and figures as-filed. Latest ADV filing 2026-03-31. Form ADV ↗
| Name | Title (as filed) | Since | Ownership |
|---|---|---|---|
| WOLFSON, MARK, ALAN | PARTNER | 2005-07 | 10–25% ·◆ |
| DUNCAN, CORI, KIMBERLEY | PARTNER | 2013-01 | 5–10% ·◆ |
| HAYES, RICHARD, JOSEPH | PARTNER | 2005-07 | 5–10% ·◆ |
| ABRAHMS, AARON | PARTNER | 2023-01 | <5% ·◆ |
| ARAUJO, ADAN, DOROTEO | CHIEF COMPLIANCE OFFICER | 2011-01 | <5% ·◆ |
| CHEN, JENNY, PEARL | PARTNER | 2019-01 | <5% ·◆ |
| DANIELEWICZ, BRIAN, MICHAEL | PARTNER | 2019-01 | <5% ·◆ |
| DEHOFF, OWEN, GLENN | PARTNER | 2020-01 | <5% ·◆ |
| DURHAM, RAYMOND, LEE | CHIEF FINANCIAL OFFICER | 2021-01 | <5% ·◆ |
| MESROUR, SAMI | PARTNER | 2020-01 | <5% ·◆ |
| RAMSAY, ROBERT, ERIC | PARTNER | 2019-01 | <5% ·◆ |
| RUIZ, GREGORY, ANDREW | PARTNER | 2023-01 | <5% ·◆ |
| SCARBROUGH, JAMES, AUSTIN | PARTNER | 2019-01 | <5% ·◆ |
| SEACREST, CAYMAN | PARTNER | 2018-01 | <5% ·◆ |
| SWAMINATHAN, RAJESH | CHIEF LEGAL OFFICER | 2017-01 | <5% ·◆ |
| TANDON, NIKHILESH | PARTNER | 2019-01 | <5% ·◆ |
| PHIPPS, GEORGE, DYER | RETIRED | 2022-12 | <5% |
| JRP MANAGER HOLDINGS, L.P.entity | LIMITED PARTNER | 2008-06 | 75%+ ·◆ |
| JASPER RIDGE GENPAR, LLCentity | GENERAL PARTNER | 2005-07 | <5% ·◆ |
| PARKER INVESTORS, L.P.entity | LIMITED PARTNER | 2005-07 | <5% ·◆ |
Direct owners and executive officers as filed on the adviser's Form ADV Schedule A (as-filed titles; ADV updates annually and on material change). This lists officers and 5%+ owners — not necessarily the full portfolio-management team.
Signed this manager's latest 13F (2026-Q1). The filing's authorized signatory — frequently a compliance officer, general counsel, or CFO — not necessarily the portfolio manager or firm leadership.
| Name | Role (as filed) | Departed after | Now at (if tracked) |
|---|---|---|---|
| ALEXANDER, JAMES, NEWTON | PARTNER EMERITUS · MANAGING PARTNER | 2023-11 | — not seen at a tracked firm |
| WOLFE, JEREMY, MICHAEL | MANAGING PARTNER · PARTNER | 2022-03 | — not seen at a tracked firm |
| PAVKOV, PAMELA, BANDYOPADHYAY | PARTNER | 2022-03 | — not seen at a tracked firm |
| FANT, JOHN, HOWARD | PARTNER · CHIEF LEGAL OFFICER | 2021-03 | — not seen at a tracked firm |
| MUHLBEIER, JACK, ALAN | CHIEF FINANCIAL OFFICER | 2021-02 | — not seen at a tracked firm |
| ASSANTE, LINDA, MARY | MANAGING PARTNER · PARTNER | 2021-02 | — not seen at a tracked firm |
| ISAAC, VEENA | PARTNER | 2018-10 | — not seen at a tracked firm |
| BIZER, DAVID, SCOTT | MANAGING PARTNER | 2017-03 | — not seen at a tracked firm |
| ANSON, MARK, JONATHON | MANAGING PARTNER | 2012-08 | PANAGORA ASSET MANAGEMENT INC |
Named owners/officers on a past Form ADV Schedule A who are gone from the firm's latest filing. “Departed after” is the last dated filing they appear on. A landing shows only when the destination is another SEC-registered adviser we track.
