GTBP

Phase 1 trial evaluating GTB-3650 TriKE® remains ongoing, with additional updates anticipated in 2H 2026 Phase 1 basket trial evaluating GTB-5550 TriKE® in multiple solid tumor types known to express B7-H3 initiated May 2026 with updates anticipated in 2H 2026 as enrollment progresses through dose escalation cohorts Cash balance as of March 31, 2026 of approximately $9 million anticipated to provide sufficient cash runway through Q4 2026 SAN FRANCISCO, CALIFORNIA, May 15, 2026 (GLOBE NEWSWIRE) -- GT Biopharma, Inc. (the “Company”) (NASDAQ: GTBP), a clinical stage immuno-oncology company focused on developing innovative therapeutics based on the Company's proprietary natural killer (NK) cell engager TriKE® platform, today announced first quarter 2026 financial results for the period ended March 31, 2026. "With the initiation of our GTB-5550 Phase 1 trial, we have now advanced three TriKE® candidates into the clinic, a significant milestone that underscores the continued momentum of our pipeline," said Michael Breen, Executive Chairman and Chief Executive Officer. "GTB-3650 has demonstrated an excellent safety profile thus far, and we look forward to continuing enrollment progress. With sufficient cash runway through Q4 2026, we look forward to providing updates on both programs in the second half of 2026." GTB-3650 TriKE for CD33 positive leukemias The ongoing Phase 1 dose escalation study is evaluating GTB-3650 for relapsed or refractory (r/r) CD33 expressing hematologic malignancies, including refractory acute myeloid leukemia and high-risk myelodysplastic syndrome. Enrollment is ongoing, with Cohort 4 enrollment now complete and a total of 8 patients treated across the first four cohorts; the Company expects to provide continued progress updates throughout 2026. Dose escalation may continue up to Cohort 7 as necessary with the potential to evaluate GTB-3650 in a total of 14 patients (two patients per cohort). GTB-3650 is dosed in two-week blocks, two weeks on and two weeks off, for up to four months based on clinical benefit. The trial aims to assess the safety, pharmacokinetics, pharmacodynamics, in vivo expansion of endogenous patient NK cells and clinical activity. GTB-5550 TriKE for B7H3 positive solid tumor cancers The ongoing Phase 1 trial with GTB-5550 is the first nanobody TriKE® tested with more patient-friendly subcutaneous dosing. The Phase 1a d...

Phase 1 trial evaluating GTB-3650 TriKE® continues to actively enroll, with the next update anticipated in Q3 2026 following completion of enrollment in dose Cohort 5 Phase 1 basket trial evaluating GTB-5550 TriKE® in multiple solid tumor types known to express B7-H3 remains on track to initiate mid-2026 Unaudited proforma cash balance as of January 31, 2026 of approximately $9 million anticipated to provide sufficient cash runway through Q4 2026 SAN FRANCISCO, CALIFORNIA, March 02, 2026 (GLOBE NEWSWIRE) -- GT Biopharma, Inc. (the “Company”) (NASDAQ: GTBP), a clinical stage immuno-oncology company focused on developing innovative therapeutics based on the Company's proprietary natural killer (NK) cell engager TriKE® platform, today announced full year 2025 financial results for the period ended December 31, 2025. “2026 looks to bring more significant milestones for the company, as we plan to initiate the first clinical trial with GTB-5550,” said Michael Breen, Executive Chairman and Chief Executive Officer. “Advancing our third TriKE candidate into the clinic underscores the continued momentum of our pipeline. GTB-3650 has shown an excellent safety profile thus far, and the higher dose cohorts will be more reflective of surpassing a potential efficacy threshold. With sufficient cash runway through Q4 2026, we look forward to providing the next update in the third quarter of 2026.” GTB-3650 TriKE for CD33 positive leukemias The ongoing Phase 1 dose escalation study is evaluating GTB-3650 for relapsed or refractory (r/r) CD33 expressing hematologic malignancies, including refractory acute myeloid leukemia and high-risk myelodysplastic syndrome. Enrollment in Cohort 4 (10 µg/kg/day) is ongoing, and the Company expects to initiate dosing in Cohort 5 (25 µg/kg/day) in Q2 2026. The Company anticipates providing the next update in the third quarter of 2026, which would include longer term follow-up on the six patients in Cohort 1 through 3 as well as initial observations from patients in Cohort 4 and Cohort 5. Dose escalation may continue up to Cohort 7 as necessary with the potential to evaluate GTB-3650 in a total of 14 patients (two patients per cohort). GTB-3650 is dosed in two-week blocks, two weeks on and two weeks off, for up to four months based on clinical benefit. The trial aims to assess the safety, pharmacokinetics, pharmacodynamics, in vivo expansion o...

Phase 1 trial evaluating GTB-3650 TriKE® for relapsed or refractory (r/r) CD33 expressing hematologic malignancies continues to actively enroll with the next update anticipated in Q1 2026 GTB-5550 TriKE® IND submission for B7H3-expressing solid tumors expected in late December 2025 or January 2026 SAN FRANCISCO, CALIFORNIA, Nov. 14, 2025 (GLOBE NEWSWIRE) -- GT Biopharma, Inc. (the “Company”) (NASDAQ: GTBP), a clinical stage immuno-oncology company focused on developing innovative therapeutics based on the Company's proprietary natural killer (NK) cell engager TriKE® platform, today announced third quarter 2025 financial results for the period ended September 30, 2025. The Company’s Phase 1 dose escalation study is evaluating GTB-3650 in a total of 14 patients (two patients per cohort) with relapsed or refractory (r/r) CD33 expressing hematologic malignancies, including refractory acute myeloid leukemia and high-risk myelodysplastic syndrome. GTB-3650 is dosed in two-week blocks, two weeks on and two weeks off, for up to four months based on clinical benefit. The trial aims to assess the safety, pharmacokinetics, pharmacodynamics, in vivo expansion of endogenous patient NK cells and clinical activity. The Company plans to provide the next update on the trial in the first quarter of 2026 following completion of additional dose cohorts. “We are highly encouraged by the continued progress of our Phase 1 clinical trial evaluating GTB-3650 in cancer patients, which has now advanced to Cohort 4 at a dose level of 10 µg/kg/day,” said Michael Breen, Executive Chairman and Chief Executive Officer. “We look forward to assessing higher doses, as we are now approaching the efficacy range predicted by preclinical in vivo leukemia models, and we plan to share the next trial update in the first quarter of 2026. The excellent safety profile observed with GTB-3650 and the immune activation potential of bringing IL-15 to the immune synapse suggests a potential competitive advantage for GTB-5550 compared to other modalities like bispecific antibodies, cell therapies, and antibody drug conjugates also targeting solid tumors expressing B7H3, which is quicky emerging as a compelling novel immune checkpoint target.” Third Quarter 2025 Financial Summary Cash Position: The Company had cash and cash equivalents of approximately $2.6 million as of September 30, 2025, which is anticipat...

GTB-3650 TriKE® Phase 1 trial has successfully completed Cohort 1 and Cohort 2 dosing, treating a total of four patients; following Cohort 2’s formal safety review, it has advanced into Cohort 3 and initiated dosing of the fifth patient in the study; initial Phase 1 data expected later in 2025 GTB-5550 TriKE® IND submission for treatment of B7H3 positive solid tumors expected in Q4 2025; recent peer-reviewed publication highlights the pre-clinical anti-tumor activity of GTB-5550 against head and neck cancer Cash of approximately $5.3 million as of June 30, 2025, anticipated to be sufficient to fund operations into Q1 2026 SAN FRANCISCO, CALIFORNIA, Aug. 14, 2025 (GLOBE NEWSWIRE) -- GT Biopharma, Inc. (the “Company”) (NASDAQ: GTBP), a clinical stage immuno-oncology company focused on developing innovative therapeutics based on the Company's proprietary natural killer (NK) cell engager TriKE® platform, today announced second quarter 2025 financial results for the period ended June 30, 2025. “We are pleased with the enrollment momentum in our Phase 1 clinical trial evaluating GTB-3650 in cancer patients, which continues to advance on schedule,” said Michael Breen, Executive Chairman and Chief Executive Office of GT Biopharma. "Moving into the third dose cohort after a successful safety review and encouraging early evidence of immunological activity, mark important steps forward in the development of GTB-3650. We look forward to sharing more data later this year to reinforce the ability of our TriKE constructs to activate endogenous NK cells, and the potential for broader utility with other targets to treat solid tumors (GTB-5550) and autoimmune indications (GTB-7550)." The Phase 1 dose escalation study is evaluating GTB-3650 in 12 patients (six cohorts) with relapsed or refractory (r/r) CD33 expressing hematologic malignancies, including refractory acute myeloid leukemia (AML) and high-risk myelodysplastic syndrome (MDS). GTB-3650 is dosed in two-week blocks, two weeks on and two weeks off, for up to four months based on clinical benefit. The trial will assess safety, pharmacokinetics, pharmacodynamics, in vivo expansion of endogenous patient NK cells and clinical activity. GT Biopharma plans on releasing more detailed results later in 2025 following enrollment and completion of additional dose cohorts. Second Quarter 2025 Financial Summary Cash Position: The C...