# Horizon Space Acquisition II Corp. (HSPTR) — merger/spac_merger [completed] Source: SEC API (secapi.ai) · situation sit_32cce9b8cf9049311d02 · retrieved 2026-08-11T16:12:47.358Z ## Overview SL Bio Ltd. is a biomedical company specialized in developing innovative cellular and gene therapies, utilizing immune stem cells to target cancer and bovine-derived milk exosomes to regenerate damaged tissues, with proprietary technologies including Armed-T and Gamma Delta T cells for cellular therapies. Horizon Space Acquisition II Corp. (HSPT), a blank-check company, has agreed to merge with SL Bio Ltd., a biomedical company developing cellular and gene therapies, in a transaction valued at $5.568 billion. Under the Business Combination Agreement dated May 9, 2025, Merger Sub I will merge with HSPT (with HSPT surviving as a PubCo subsidiary), followed by Merger Sub II merging with SL Bio (with SL Bio surviving as a PubCo subsidiary). HSPT and SL Bio shareholders will receive PubCo Ordinary Shares ($0.00001 par value) as consideration. The combined company, SL Science Holding Limited (PubCo), is expected to list on Nasdaq under the symbol "SLBT" following consummation. SL Bio shareholders will receive PubCo Ordinary Shares based on an exchange ratio equal to $5.568 billion divided by $10.00 per share, divided by the number of SL Bio ordinary shares outstanding at the Second Merger Effective Time. ## Terms - Counterparty: SL Bio Ltd. · Deal value: $5.57B · Consideration: stock ## Key dates - Vote 2026-02-03 ## Timeline - 2026-01-13 · DEFM14A (0001213900-26-003872): DEFM14A - Horizon Space Acquisition II Corp. — *SL Bio Ltd. is a biomedical company specialized in developing innovative cellular and gene therapies, utilizing immune stem cells to target cancer and bovine-derived milk exosomes to regenerate damaged tissues, with proprietary technologies including Armed-T and Gamma Delta T cells for cellular therapies.* Horizon Space Acquisition II Corp. (HSPT), a blank-check company, has agreed to merge with SL Bio Ltd., a biomedical company developing cellular and gene therapies, in a transaction valued at $5.568 billion. Under the Business Combination Agreement dated May 9, 2025, Merger Sub I will merge with HSPT (with HSPT surviving as a PubCo subsidiary), followed by Merger Sub II merging with SL Bio (with SL Bio surviving as a PubCo subsidiary). HSPT and SL Bio shareholders will receive PubCo Ordinary Shares ($0.00001 par value) as consideration. The combined company, SL Science Holding Limited (PubCo), is expected to list on Nasdaq under the symbol "SLBT" following consummation. SL Bio shareholders will receive PubCo Ordinary Shares based on an exchange ratio equal to $5.568 billion divided by $10.00 per share, divided by the number of SL Bio ordinary shares outstanding at the Second Merger Effective Time. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-003872.txt - 2026-01-15 · 425 (0001213900-26-004675): 425 - Horizon Space Acquisition II Corp. — *Horizon Space Acquisition II Corp. is a blank-check company incorporated in the Cayman Islands that seeks to identify and complete a business combination with an operating company.* Horizon Space Acquisition II Corp. (HSPT), a blank-check company, is pursuing a business combination with SL BIO Ltd., a Cayman Islands exempted company. HSPT filed a definitive proxy statement on January 13, 2026, and scheduled an extraordinary general meeting of shareholders for February 3, 2026 to vote on the proposed business combination. Public shareholders have redemption rights allowing them to redeem shares for cash from the trust account at a per-share price equal to the aggregate trust account balance divided by the number of outstanding public shares, with a redemption deadline of January 30, 2026 (two business days prior to the vote). https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-004675.txt - 2026-01-15 · 425 (0001213900-26-004692): 425 - Horizon Space Acquisition II Corp. — *SL BIO Ltd. is a Cayman Islands-based biological products company engaged in the development and commercialization of biological products.* Horizon Space Acquisition II Corp. (HSPT), a blank-check company, is pursuing a business combination with SL BIO Ltd., a Cayman Islands-based biological products company. An extraordinary general meeting of HSPT shareholders is scheduled for February 3, 2026, to vote on the proposed merger. The definitive proxy statement was filed on January 13, 2026. Public shareholders have redemption rights allowing them to redeem shares for cash from the trust account at a per-share price equal to the aggregate trust account balance divided by the number of outstanding public shares, with a redemption deadline of January 30, 2026 (two business days prior to the vote). https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-004692.txt - 2026-01-15 · 425 (0001213900-26-004683): 425 - Horizon Space Acquisition II Corp. — *Horizon Space Acquisition II Corp. is a blank-check company incorporated in the Cayman Islands that seeks to identify and complete a business combination with an operating company.* Horizon Space Acquisition II Corp. (HSPT), a blank-check company, is pursuing a business combination with SL BIO Ltd., a Cayman Islands exempted company. An extraordinary general meeting of HSPT shareholders is scheduled for February 3, 2026, to vote on the proposed merger. The definitive proxy statement was filed on January 13, 2026. Public shareholders may redeem their shares for cash from the trust account at a per-share price equal to the aggregate trust account balance divided by the number of outstanding public shares, with a redemption deadline of 5:00 pm Eastern Time on January 30, 2026. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-004683.txt - 2026-01-30 · 425 (0001213900-26-009871): 425 - Horizon Space Acquisition II Corp. — *Horizon Space Acquisition II Corp. is a blank-check company (SPAC) formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities.* Horizon Space Acquisition II Corp. (HSPT), a blank-check SPAC, postponed its extraordinary general meeting originally scheduled for February 3, 2026 to February 12, 2026 at 9:00 a.m. Eastern Time to allow additional time to engage with shareholders regarding the proposed business combination with SL BIO Ltd., a Cayman Islands exempted company. The record date for voting remains December 29, 2025. As a result of the postponement, the deadline for public shareholders to deliver redemption requests was extended to 5:00 p.m. Eastern Time on February 10, 2026. The meeting location, record date, and all proposals remain unchanged. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-009871.txt - 2026-01-30 · 425 (0001213900-26-009873): 425 - Horizon Space Acquisition II Corp. — *Horizon Space Acquisition II Corp. is a blank-check company formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities.* Horizon Space Acquisition II Corp. (HSPT), a blank-check SPAC, postponed its extraordinary general meeting originally scheduled for February 3, 2026 to February 12, 2026 at 9:00 a.m. Eastern Time to allow additional time to engage with shareholders regarding the proposed business combination with SL BIO Ltd., a Cayman Islands exempted company. The record date for determining shareholders entitled to vote remains December 29, 2025. As a result of the postponement, the deadline for public shareholders to deliver redemption requests was extended to 5:00 p.m. Eastern Time on February 10, 2026. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-009873.txt - 2026-01-30 · 425 (0001213900-26-009874): 425 - Horizon Space Acquisition II Corp. — *Horizon Space Acquisition II Corp. is a blank-check SPAC formed to effect a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities.* Horizon Space Acquisition II Corp. (HSPT), a blank-check SPAC, postponed its extraordinary general meeting originally scheduled for February 3, 2026 to February 12, 2026 at 9:00 a.m. Eastern Time to allow additional time to engage with shareholders regarding the proposed business combination with SL BIO Ltd., a Cayman Islands exempted company. The record date for voting remains December 29, 2025, and the redemption request deadline for public shareholders was extended to 5:00 p.m. Eastern Time on February 10, 2026. The meeting location, record date, and all proposals remain unchanged. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-009874.txt - 2026-02-03 · 425 (0001213900-26-011285): 425 - Horizon Space Acquisition II Corp. — *Horizon Space Acquisition II Corp. is a blank check company (SPAC) formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities.* Horizon Space Acquisition II Corp. (HSPT), a blank check company, is pursuing a proposed business combination with SL BIO Ltd., a Cayman Islands exempted company. HSPT filed a definitive proxy statement on January 13, 2026, and scheduled an extraordinary general meeting of shareholders for February 12, 2026, to vote on the business combination. The filing also references extension proposals to extend the deadline to complete the initial business combination, with a separate extension meeting scheduled for February 13, 2026. The record date for determining shareholders entitled to vote is December 29, 2025. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-011285.txt - 2026-02-03 · 425 (0001213900-26-011279): 425 - Horizon Space Acquisition II Corp. — *Horizon Space Acquisition II Corp. is a blank check company formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities.* Horizon Space Acquisition II Corp. (HSPT), a blank check company, is pursuing a proposed business combination with SL BIO Ltd., a Cayman Islands exempted company. HSPT filed a definitive proxy statement on January 13, 2026, and scheduled an extraordinary general meeting of shareholders for February 12, 2026, to vote on the proposed business combination. The registration statement on Form F-4 was declared effective on January 13, 2026. The record date for determining shareholders entitled to vote is December 29, 2025. Public shareholders may redeem their shares prior to the vote, with a redemption deadline of 5:00 p.m. Eastern Time on February 10, 2026, for the Business Combination Meeting. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-011279.txt - 2026-02-03 · 425 (0001213900-26-011287): 425 - Horizon Space Acquisition II Corp. — *Horizon Space Acquisition II Corp. is a blank check company (SPAC) formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or similar business combination with one or more businesses or entities.* Horizon Space Acquisition II Corp. (HSPT), a blank check company, is pursuing a proposed business combination with SL BIO Ltd., a Cayman Islands exempted company. HSPT filed a definitive proxy statement on January 13, 2026, and scheduled an extraordinary general meeting of shareholders for February 12, 2026, to vote on the business combination. The filing clarifies the redemption process for public shareholders in connection with both the Business Combination Meeting and a separate Extension Meeting scheduled for February 13, 2026, which will address proposed amendments to extend the deadline to complete the initial business combination. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-011287.txt - 2026-02-06 · 425 (0001213900-26-013226): 425 - Horizon Space Acquisition II Corp. — Horizon Space Acquisition II Corp. (HSPT), a blank-check company, is pursuing a business combination with SL BIO Ltd., a Cayman Islands exempted company. HSPT filed a definitive proxy statement on January 13, 2026, and scheduled an extraordinary general meeting of shareholders for February 12, 2026 to vote on the proposed business combination. Following consummation, the combined entity will be named SL Science Holding Limited (PubCo). The filing supplements the proxy with additional independent director nominees, including Joseph Levinson and Qian (Hebe) Xu, and updates beneficial ownership information showing William Wang will hold 58.9% of PubCo ordinary shares in a no-redemption scenario. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-013226.txt - 2026-02-06 · 425 (0001213900-26-013231): 425 - Horizon Space Acquisition II Corp. — *SL BIO Ltd. is a Cayman Islands exempted company limited by shares engaged in biological products (no diagnostic substances).* Horizon Space Acquisition II Corp. (HSPT), a blank-check company, is pursuing a business combination with SL BIO Ltd., a Cayman Islands exempted company. The extraordinary general meeting of HSPT shareholders is scheduled for February 12, 2026, to vote on the proposed merger. Following consummation, the combined entity will be named SL Science Holding Limited (PubCo). The filing supplements the definitive proxy statement with additional independent director nominees, including Joseph Levinson and Qian (Hebe) Xu, and updates beneficial ownership information. The record date for voting is December 29, 2025, and the redemption deadline is February 10, 2026. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-013231.txt - 2026-02-06 · 425 (0001213900-26-013232): 425 - Horizon Space Acquisition II Corp. — *SL BIO Ltd. is a Cayman Islands exempted company engaged in biological products development.* Horizon Space Acquisition II Corp. (HSPT), a blank-check company, is pursuing a business combination with SL BIO Ltd., a Cayman Islands-based biological products company. The extraordinary general meeting of HSPT shareholders is scheduled for February 12, 2026, to vote on the proposed merger. The definitive proxy statement was filed on January 13, 2026, with a record date of December 29, 2025, and a redemption deadline of February 10, 2026. Following the consummation, the combined entity will be named SL Science Holding Limited (PubCo), with William Wang Ching-Dong as Chief Executive Officer and Chairman, holding 58.9% of voting power in the no-redemption scenario and 59.6% in the maximum-redemption scenario. https://www.sec.gov/Archives/edgar/data/2032950/0001213900-26-013232.txt ## Citations - 0001213900-26-003872 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026003872 - 0001213900-26-004675 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026004675 - 0001213900-26-004692 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026004692 - 0001213900-26-004683 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026004683 - 0001213900-26-009871 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026009871 - 0001213900-26-009873 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026009873 - 0001213900-26-009874 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026009874 - 0001213900-26-011285 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026011285 - 0001213900-26-011279 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026011279 - 0001213900-26-011287 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026011287 - 0001213900-26-013226 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026013226 - 0001213900-26-013231 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026013231 - 0001213900-26-013232 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000121390026013232