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Core Insights - Exicure, Inc. (NASDAQ:XCUR) stock experienced a significant increase of 63.23%, reaching $8.70, following the announcement of positive results from its Phase 2 trial of burixafor in multiple myeloma patients [6] Group 1: Trial Results - Approximately 90% of study participants achieved the primary endpoint of collecting ≥2 × 10⁶ CD34+ cells/kg within two leukapheresis sessions [2][3] - Among the 19 participants, 17 (89.5%) met the primary endpoint, with two requiring an additional session to achieve the target [3] - The median time to neutrophil engraftment was 13 days, and the median time to platelet engraftment was 17.5 days for those who proceeded to transplant [4] Group 2: Mechanism and Efficacy - Burixafor is an investigational small molecule that blocks CXCL12 binding to CXCR4 receptors, facilitating rapid mobilization of hematopoietic progenitor cells from the bone marrow [2] - The combination of burixafor with propranolol enhanced mobilization by inhibiting the β2-adrenergic receptor [3] - Peak peripheral levels of CD34+ cells were observed within one hour of burixafor administration, allowing for same-day administration and apheresis [4] Group 3: Safety Profile - The burixafor combination was well tolerated, with no related adverse events exceeding Grade 2 [6] - Among participants with prior exposure to daratumumab, 87.5% achieved the primary endpoint, indicating the treatment's effectiveness even in previously treated patients [5]

Core Viewpoint - Exicure has experienced a significant stock price rally due to promising Phase 2 trial results for its investigational drug burixafor, which is designed for hematopoietic progenitor cell mobilization in multiple myeloma patients [1][3]. Group 1: Stock Performance - Exicure shares surged 70% in pre-market trading to approximately $9, following a previous close of $5.33, marking a year-to-date decline of 64.89% [1]. - The early-morning rally was a response to the positive trial results, indicating a strong market reaction to the new data [3]. Group 2: Clinical Trial Results - Nearly 90% of trial participants achieved the required CD34+ cell thresholds within two leukapheresis sessions when treated with burixafor in combination with propranolol and G-CSF [4]. - The therapy demonstrated effectiveness in patients previously treated with daratumumab, a group that typically has lower mobilization success [5]. - Burixafor's rapid activity was highlighted, with peak CD34+ cell levels appearing within an hour, distinguishing it from other drugs in the same class [5]. Group 3: Institutional Ownership - Despite its small size and previous decline, Exicure has maintained a presence in the portfolios of major institutional investors, including BlackRock, Carlyle Group, Vanguard, Geode Capital Management, and UBS Group [6][7]. - As of September 30, 2025, BlackRock held 5,730 shares of Exicure, indicating continued interest from professional investors [6].

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