Vismodegib will be administered orally at the label-recommended dose (150 mg) once daily until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months).

Ipatasertib will be administered orally at the label-recommended dose (400 mg) once daily on Days 1-21 of each 28-day Cycle in combination with paclitaxel, and as monotherapy after the final administration of paclitaxel, until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months).

Olaparib will be administered orally at the label-recommended dose (400 mg) twice daily until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months).

Erlotinib will be administered orally in combination with Bevacizumab at the label recommended dose (150 mg) once daily until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months)

Bevacizumab will be administered intravenously at 15mg/kg every 3 weeks in combination with Erlotinib until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months)

Vemurafenib will be administered orally, 960 mg twice daily, in combination with Cobimetinib, until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months)

Cobimetinib will be administered orally, 60mg once daily, in combination with Vemurafenib, on Days 1-21 of each 28-day Cycle, until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months)

Trastuzumab will be administered subcutaneously, 600 mg every 3 weeks, in combination with Pertuzumab and chemotherapy, until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months)

Pertuzumab will be initially be administered intravenously, 840 mg, followed by 420 mg every 3 weeks, in combination with Trastuzumab and chemotherapy, until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months)

Atezolizumab will be administered intravenously at the label-recommended dose (1200 mg), alone or in combination with chemotherapy, every 3 weeks until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months).

Carboplatin will be administered intravenously at the area under the curve (AUC) dose once every 3 weeks for up to 9 Cycles (Cycle = 21 days) in some combination with the following: Paclitaxel, Gemcitabine, Atezolizumab, Pertuzumab, and Trastuzumab SC.

Paclitaxel will be administered intravenously, 175 mg/m^2, once every 3 weeks for up to 9 cycles (Cycle = 21 days) in some combination with the following: Carboplatin, Ipatasertib, Atezolizumab, Pertuzumab, and Trastuzumab SC

Cisplatin will be administered intravenously, 60-75 mg/m^2, once every three weeks, for up to 9 cycles (Cycle = 21 days) in some combination with the following: Gemcitabine, Paclitaxel, Atezolizumab, Pertuzumab, and Trastuzumab SC.

Gemcitabine will be administered intravenously, 1000 mg/m^2, twice every three weeks for up to 9 cycles (Cycle = 21 days) in some combination with the following: Cisplatin, Carboplatin, Atezolizumab, Pertuzumab, and Trastuzumab SC.

Entrectinib will be administered orally at the label-recommended dose (600 mg) once daily until loss of clinical benefit or unacceptable toxicity, through the end of the study (approximately 70 months).

Ivosidenib will be administered orally at the label-recommended dose (500mg) once daily across a 28-day treatment cycle until loss of clinical benefit or unacceptable toxicity.

Pemigatinib will be administered orally at the label-recommended dose (13.5mg) once daily across a 21-day treatment cycle until loss of clinical benefit or unacceptable toxicity.

Category 1 included participants with cancer of unknown primary site (CUP) with a complete response (CR), partial response (PR), or stable disease (SD) after 3 cycles of platinum induction chemotherapy (provided at the beginning of the study).

Participants in this arm continued to receive the same chemotherapy regimen used during induction for a minimum of 3 additional cycles.

Category 2 included participants with progressive disease (PD) after 3 cycles of platinum induction chemotherapy. Participants in this arm received either MGT based on their comprehensive genomic profile until loss of clinical benefit, unacceptable toxicity, participant or investigator decision to discontinue, or death, whichever occurred first, or the same chemotherapy regimen used during induction for a minimum of 3 additional cycles.