According to @rovercrc, the U.S. SEC has acknowledged the filing for Invesco Galaxy’s spot Solana (SOL) ETF, indicating the application has entered the formal review process; source: Crypto Rover on X dated Aug 14, 2025. An SEC acknowledgment typically leads to publication of a notice and starts an initial 45-day decision window under Exchange Act Rule 19b-4, extendable in stages up to 240 days; source: U.S. SEC, 17 CFR 240.19b-4 and Section 19(b). Acknowledgment does not imply approval or endorsement and only initiates statutory review; source: U.S. SEC guidance on Section 19(b) rule filings. Traders should track the Federal Register notice and the exchange’s SRO docket to map statutory deadlines that can drive headline risk for SOL and correlated assets; source: Federal Register notices and U.S. SEC rulemaking process.