Which institutional investors primarily drove the 516.26% increase in DVLT shares held in the most recent quarter?

The significant 516.26% increase in Datavault AI Inc. (DVLT) shares held by institutional investors in the most recent quarter was primarily driven by several key funds, with Vanguard Group Inc. making a particularly substantial contribution.1

Key drivers of this increase include:

• Vanguard Group Inc. reported a massive 1,790.20% increase in their holdings, adding 1,242,446 shares as of their May 9, 2025 filing.1 This represents a significant portion of the overall institutional accumulation.
• Fidelity Total Market Index Fund (FSKAX) increased its position by 802.79%, holding 84,456 shares as of July 24, 2025.1
• Fidelity Series Total Market Index Fund (FCFMX) also showed a substantial increase of 679.89%, holding 77,825 shares as of July 24, 2025.1

Other notable institutional holders include BlackRock, Inc., Geode Capital Management, Llc, and Anson Funds Management LP, who are among the largest shareholders in DVLT.1 These movements reflect a broader trend of increased institutional interest in Datavault AI Inc. during the period.

Identify the specific 13F filing periods that correspond to the "most recent quarter" for DVLT.