Most material SEC filings — September 16, 2026

Xenetic Biosciences (market cap ~$5.1M) agreed to acquire all issued shares of Swiss biotech Santersus AG from multiple sellers via stock exchange. Santersus shareholders will receive Company Common Stock at an Exchange Ratio to be calculated based on Net Cash at Closing; Santersus converts preferred shares to ordinary shares pre-closing; deal contemplates company name change to 'Santersus Bio, Inc.' and requires stockholder approval. No dollar consideration amount is specified in the agreement text; the actual exchange ratio depends on a Net Cash calculation mechanism with dispute resolution via Baker Tilly if parties disagree.

Barnwell Industries completed the sale of its remaining Hawaii development interests (KKM Makai, LLLP and KD Kona 2013 LLLP partnership interests plus related development rights) for a gross purchase price of $1.77 million, netting $1.54 million in cash proceeds plus $0.14 million in pre-closing distributions, totaling $1.7 million in cash receipts. The transaction eliminates future capital commitments, simplifies the portfolio, and completes the company's exit from Hawaii.

PEDEVCO won a BLM competitive lease sale on September 9-10, 2026, acquiring approximately 5,678 net acres in Wyoming's Powder River Basin Mowry formation for $5.9 million ($1,045/acre). The acquisition, funded from cash on hand, nearly doubles the company's Mowry acreage position to ~12,000 net acres with ten-year lease terms and 12.5% royalty rate (87.5% NRI retained).

Karman Holdings disclosed Q2 2026 results in investor update: backlog increased to $1.322B (69% organic growth from $580M at Q4 2024), book-to-bill ratio ~1.6x over 18 months, Adjusted EBITDA margin ~30%, and 5 acquisitions totaling ~$453M enterprise value since IPO with average $11M EBITDA at close. Company deployed $35–38M capex in 2026 for facility expansions (Skagit WA energetics, Salt Lake City nozzle production, Horsham PA materials). Revenue grew 58% YoY in Q3 2026E, exceeding analyst consensus. No specific counterparties or share counts disclosed; Walker acquisition closed August 2026 (post-Q2, excluded from results).