Winmill & Co. Inc. has demonstrated a consistent and exclusive buying pattern in recent SEC Form 4 filings, with no sell transactions recorded across its 36 reported trades. The firm has directed its investments primarily toward two securities: its own stock (SELF) and Blackstone Secured Lending Fund (BXSY). Between late July and late November 2025, Winmill executed 25 purchases totaling $1.55 million, with the most substantial activity occurring in BXSY during July. On July 28, 2025, the firm made its largest single transaction, acquiring $131,765 worth of BXSY shares, followed by an $86,319 purchase two days later.
The buying focus shifted decisively to SELF from August through December 2025, with nearly daily acquisitions ranging from $2,570 to $40,973 per transaction. Notably, the purchases intensified in November, with 13 consecutive trading days of buying between November 11 and December 1, including multiple six-figure weekly accumulations. The November 14 purchase of $35,838 in SELF shares marked the month’s peak single-trade value. This concentrated, sustained acquisition of Winmill’s own stock—coupled with the complete absence of disposals—suggests a strong internal commitment to retaining equity. The parallel investment in BXSY, while smaller in frequency, reflects a secondary but material allocation to the financial sector.
AI-assisted summary