Treatments and/or Procedures

Study Criteria

Inclusion Criteria:

  -  For all participants:

  -  Has measurable disease per RECIST 1.1 or PCWG-modified RECIST 1.1 as assessed by the
     local site Investigator/radiology and confirmed by BICR.

  -  Is able to provide a newly obtained core or excisional biopsy of a tumor lesion or
     either an archival formalin-fixed paraffin embedded (FFPE) tumor tissue block or
     slides.

  -  Has a life expectancy of at least 3 months.

  -  Has an Eastern Cooperative Oncology Group (ECOG) performance status of either 0 or 1,
     as assessed within 7 days of treatment initiation.

  -  Male participants must agree to use contraception during the treatment period and for
     at least 95 days (3 months and 5 days) after the last dose of study treatment and
     refrain from donating sperm during this period.

  -  A female participant is eligible to participate if she is not pregnant or
     breastfeeding, and at least one of the following conditions applies:

       1. Is not a woman of childbearing potential (WOCBP).

       2. Is a WOCBP and using a contraceptive method that is highly effective with low
          user dependency, or be abstinent from heterosexual intercourse as their preferred
          and usual lifestyle (abstinent on a long term and persistent basis), during the
          intervention period and for at least 180 days after the last dose of study
          intervention, AND agrees not to donate eggs (ova, oocytes) to others or
          freeze/store for her own use for the purpose of reproduction during this period.
          Abstains from breastfeeding during the study intervention period and for at least
          30 days after the last dose of study intervention.

  -  Has adequate organ function.

  -  For participants who have non-breast or -ovarian cancers that are breast cancer
     susceptibility gene 1/2 (BRCA1/2) mutated (BRCAm), or who have cancers that are
     BRCA1/2 non-mutated and homologous recombination repair nonmutated:

  -  Has a histologically- or cytologically-confirmed advanced (metastatic and/or
     unresectable) solid tumor (except ovarian cancer whose tumor has a germline or somatic
     BRCA mutation and breast cancer whose tumor has a germline BRCA mutation) that is not
     eligible for curative treatment and for which standard of care therapy has failed.
     Participants must have progressed on or be intolerant to standard of care therapies
     that are known to provide clinical benefit. There is no limit on the number of prior
     treatment regimens.

  -  Has either centrally-confirmed known or suspected deleterious mutations in at least 1
     of the genes involved in HRR or centrally-confirmed HRD.

  -  For participants receiving prior platinum (cisplatin, carboplatin, or oxaliplatin
     either as monotherapy or in combination) for advanced (metastatic and/or unresectable)
     solid tumor, have no evidence of disease progression during the platinum chemotherapy
     or ≤4 weeks of completing the platinum-containing regimen.

  -  For participants who have somatic BRCAm breast cancer:

  -  Has histologically- or cytologically-confirmed breast cancer with evidence of
     metastatic disease.

  -  Has a known or suspected deleterious mutation in breast cancer susceptibility gene
     (BRCA) 1 or BRCA2 and does not harbor a germline BRCA1 or BRCA2 mutation - testing can
     be done centrally or locally. Blood and tissue samples must be provided by all
     participants.

  -  Has received treatment with an anthracycline unless contraindicated and a taxane in
     either the neoadjuvant/adjuvant or metastatic setting.

  -  Participants with estrogen and/or progesterone receptor-positive disease must have
     received and progressed on at least one endocrine therapy (adjuvant or metastatic), or
     have disease that the treating physician believes to be inappropriate for endocrine
     therapy.

Exclusion Criteria:

  -  Has a known additional malignancy that is progressing or has required active treatment
     in the last 5 years. Note: Participants with basal cell carcinoma of the skin,
     squamous cell carcinoma of the skin, ductal carcinoma in situ, or cervical carcinoma
     in situ that has undergone potentially curative therapy are not excluded.

  -  Has myelodysplastic syndrome (MDS)/acute myeloid leukemia (AML) or with features
     suggestive of MDS/AML.

  -  Has known central nervous system (CNS) metastases and/or carcinomatous meningitis.
     Note: Participants with previously treated brain metastases may participate if
     radiologically stable, clinically stable, and without requirement for steroid
     treatment for at least 14 days prior to the first dose of study treatment.

  -  Has received colony-stimulating factors (e.g., granulocyte colony-stimulating factor
     [G-CSF], granulocyte-macrophage colony-stimulating factor [GM-CSF] or recombinant
     erythropoietin) within 28 days prior to the first dose of study treatment.

  -  Has a known history of human immunodeficiency virus (HIV) infection.

  -  Has known active hepatitis infection (i.e., Hepatitis B or C).

  -  Is unable to swallow orally administered medication or has a gastrointestinal disorder
     affecting absorption (e.g., gastrectomy, partial bowel obstruction, malabsorption).

  -  Has received prior therapy with olaparib or with any other polyadenosine 5'
     diphosphoribose (poly[ADP ribose]) polymerization (PARP) inhibitor.

  -  Has a known hypersensitivity to the components or excipients in olaparib.

  -  Has received previous allogenic bone-marrow transplant or double umbilical cord
     transplantation (dUCBT).

  -  Has received a whole blood transfusion in the last 120 days prior to entry to the
     study. Packed red blood cells and platelet transfusions are acceptable if not
     performed within 28 days of the first dose of study treatment.

  -  Has received any anti-neoplastic systemic chemotherapy or biological therapy, targeted
     therapy, or an anticancer hormonal therapy within 3 weeks prior to the first dose of
     study intervention.

  -  Has a primary cancer of unknown origin.

  -  Has received prior radiotherapy within 2 weeks of start of study intervention.
     Participants must have recovered from all radiation-related toxicities, not require
     corticosteroids, and not have had radiation pneumonitis. A 1-week washout is permitted
     for palliative radiation (≤2 weeks of radiotherapy) to non-CNS disease.