BVF Partners L P/IL has filed 54 Form 4 trades across eight companies, with a pronounced sell bias. Total open-market sales reached $264.3 million against just $14.0 million in open-market purchases. The firm also recorded $20.2 million in acquired value, mostly through conversions and grants rather than discretionary buys. The pattern is consistent: BVF is a net distributor of shares, not an accumulator.
The largest recent activity came on June 26, 2026, when BVF sold KYMR in four open-market transactions totaling $173.7 million. The single biggest block was $89.2 million, followed by $66.8 million, $12.1 million, and $5.5 million. That same week, the firm received a zero-value grant in KYMR, a compensation event rather than a purchase. Earlier in the year, on March 31, 2026, BVF sold MLTX in three transactions worth $63.0 million combined, with the largest at $32.4 million. On May 14, 2026, the firm converted XOMA derivative securities into shares, with five conversions valued at $20.2 million total. The most recent trades, from July 2026, are four zero-value XOMA filings, likely administrative updates.
The recent direction is unambiguous. The last seven trades with dollar values are all sales. There have been no open-market purchases in the recent window. The firm’s selling has concentrated in KYMR and MLTX, while XOMA activity has been conversion-heavy. The absence of buy-side conviction, combined with the scale of the June KYMR liquidation, points to a portfolio in distribution mode.
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