Major shareholder of $ABCL acquires 38,000 shares in insider purchase

A recent insider purchase grabbed attention as Holdings Ltd. Thermopylae, a 10% owner of $ABCL, made a substantial investment in the company. The purchase of 38,000 shares on February 27, 2026, amounted to approximately $130,720. This transaction was brought to light by Quiver Quantitative through information sourced from a recent SEC filing. Following this acquisition, Holdings Ltd. Thermopylae now possesses 56,134,097 shares of this class of $ABCL stock.

Examining the overall insider trading activity, it is evident that $ABCL insiders have partaken in four trades on the open market within the past six months. Out of these transactions, four have been purchases while no sales have been reported. Looking specifically at the insiders’ involvement in trading $ABCL stock over the past half-year, Holdings Ltd. Thermopylae stands out with two purchases amounting to 215,457 shares at an estimated $711,004 but no sales. Additionally, John S. Montalbano acquired 50,000 shares for around $178,460, while Andrew Booth, the Chief Financial Officer, purchased 42,600 shares for an estimated $145,692.

Shifting focus to hedge fund activity, it has seen varying levels of engagement with $ABCL stock. During the most recent quarter, 75 institutional investors took the initiative to increase their holdings of $ABCL stock, while 82 decreased their positions. Notable movements in hedge fund activity include Baillie Gifford & Co removing 10,422,966 shares from their portfolio in Q4 2025, UBS AM adding 7,876,629 shares in the same period, and Goldman Sachs Group Inc adding a significant 4,094,268 shares to their holdings during Q4 2025. Furthermore, some other significant transactions include OrbiMed Advisors LLC removing 3,344,568 shares in Q3 2025, Tang Capital Management LLC removing 2,600,000 shares in Q4 2025, Driehaus Capital Management LLC adding 2,045,058 shares in Q4 2025, and Tudor Investment Corp ET AL incorporating 1,065,888 shares to their portfolio in Q4 2025.

It is important to note that this article serves to provide information and insights into recent investment activities surrounding $ABCL. The data presented here is sourced from SEC filings and analyzed by Quiver Quantitative. Readers are advised to conduct their own research and due diligence before making any financial decisions based on the information presented in this article.