Ridgeback Capital Investments L.P. — 13F Holdings & Portfolio
CIK 1423994 · latest 13F-HR filed 2026-08-14
Ridgeback Capital Investments L.P. manages $80.9M in 13F-reported U.S. long-equity assets across 1 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are REPL (100.00%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 1 new position and exited 1; 0 existing positions rose in reported value and 0 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Long-equity book
Distinct positions
Filed 2026-08-14
vs 2026-03-31
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q2 26Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q1 26 → Q2 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 100%Cumulative share of the portfolio held in the largest N positions.
As of the firm’s regulatory filing dated Mar 25, 2019.
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| HOLMAN, WAYNE, GEORGE Control | CHIEF EXECUTIVE OFFICER, LIMITED PARTNER since Jul 2017 | 75% or more | Individual |
| RIDGEBACK ASSET MANAGEMENT GP LLC Control | GENERAL PARTNER since Aug 2017 | Less than 5% | Domestic Entity |
| NONAS, CHRISTOPHER, ACHILLES | CHIEF COMPLIANCE OFFICER since Oct 2017 | Less than 5% | Individual |
| COMMINS, WENDY, PATRICE Control Indirect owner via RIDGEBACK ASSET MANAGEMENT GP LLC | MEMBER since Apr 2018 | General partner, trustee or manager | Individual |
| HOLMAN, WAYNE, GEORGE Control Indirect owner via RIDGEBACK ASSET MANAGEMENT GP LLC | MANAGING MEMBER since Aug 2017 | 75% or more | Individual |
Ownership & leadership changes · 5 filings with changes since Aug 9, 2017
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
- No longer listedHOLMAN, KATHLEEN, BARBARA · MEMBER · General partner, trustee or manager · indirect via RIDGEBACK ASSET MANAGEMENT GP LLC · control person · listed since Aug 2017
- AddedCOMMINS, WENDY, PATRICE · MEMBER · General partner, trustee or manager · indirect via RIDGEBACK ASSET MANAGEMENT GP LLC · control person
- No longer listedSheldon, Christian · CHIEF TRADING AND TECHNOLOGY OFFICER · Less than 5% · listed since Jul 2017
- AddedHOLMAN, KATHLEEN, BARBARA · MEMBER · General partner, trustee or manager · indirect via RIDGEBACK ASSET MANAGEMENT GP LLC · control person
- AddedNONAS, CHRISTOPHER, ACHILLES · CHIEF COMPLIANCE OFFICER · Less than 5%
- ChangedSheldon, Christian · title CHIEF COMPLIANCE OFFICER → CHIEF TRADING AND TECHNOLOGY OFFICER
- ChangedHOLMAN, WAYNE, GEORGE · title CHIEF EXECUTIVE OFFICER → CHIEF EXECUTIVE OFFICER, LIMITED PARTNER
- ChangedRIDGEBACK ASSET MANAGEMENT GP LLC · now a control person
- AddedHOLMAN, WAYNE, GEORGE · MANAGING MEMBER · 75% or more · indirect via RIDGEBACK ASSET MANAGEMENT GP LLC · control person
- AddedRIDGEBACK ASSET MANAGEMENT GP LLC · GENERAL PARTNER · Less than 5%
- ListedHOLMAN, WAYNE, GEORGE · CHIEF EXECUTIVE OFFICER · 75% or more · control person
- ListedSheldon, Christian · CHIEF COMPLIANCE OFFICER · Less than 5%
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Ridgeback Capital Investments L.P. Holdings (2026-06-30)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | Replimune Group Inc. | REPL | 76029N106 | $80.9M | 100.00% | 7,310,656 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-14 | $80.9M | 1 | 0001104659-26-097050 |
| 2026-03-31 | 2026-05-15 | $0 | 1 | 0001104659-26-062542 |
| 2025-12-31 | 2026-02-17 | $0 | 1 | 0001104659-26-016339 |
| 2025-09-30 | 2025-11-14 | $0 | 1 | 0001104659-25-112447 |
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