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This article reports on an SEC filing by Pulmatrix, Inc. (PULM) concerning a Notice of Effectiveness for an S-4 form, with an effectiveness date of September 25, 2026. The filing indicates a neutral impact and sentiment according to StockTitan's AI analysis. The document provides details on Pulmatrix's CIK, file number, and recent news and SEC filings, including updates on its planned merger activities.