Negative sentiment towards ASPI reflected in surge in short interest

Roman Campbell

Investors can expect a company’s stock to rise or fall based on the buying and selling of stock by its insiders. ASP Isotopes Inc shares valued at $463,840 were sold by Kiessling Heather on Dec 18 ’25. At $5.80 per share, Kiessling Heather sold 80,000 shares. The insider’s holdings dropped to 732,500 shares worth approximately $5.35 million following the completion of this transaction.

Also, Heather Kiessling purchased 80,000 shares, netting a total of over 460,800 in proceeds.

Before that, Ainscow Robert had sold 8,438 shares from its account. In a trade valued at $52,341, the Interim CEO and COO traded ASP Isotopes Inc shares for $6.20 each. Upon closing the transaction, the insider’s holdings decreased to 8,438 shares, worth approximately $11.29 million.

As published in their initiating research note from Cantor Fitzgerald on December 04, 2025, ASP Isotopes Inc [ASPI] has been an Overweight and the price target has been revised to $13. Analysts at Canaccord Genuity started covering the stock with ‘”a Buy”‘ outlook in a report released in early October. As of December 05, 2023, H.C. Wainwright has initiated its “Buy” rating for ASPI.

Analyzing ASPI Stock Performance

On last trading session, ASP Isotopes Inc [NASDAQ: ASPI] rose 0.41% to $7.3. The stock’s lowest price that day was $6.72, but it reached a high of $7.99 in the same session. During the last five days, there has been a surge of approximately 1.96%. Over the course of the year, ASP Isotopes Inc shares have jumped approximately 28.98%.

Is ASP Isotopes Inc subject to short interest?

Stocks of ASP Isotopes Inc saw a sharp rise in short interest on 2025-12-31 jumping by 1.85 million shares to 20.66 million. Data from Yahoo Finance shows that the short interest on 2025-11-28 was 18.81 million shares. A jump of 8.96% in short interest reflects a negative sentiment towards the stock. Despite the fact that short shares comprise just 3.82 of the overall float, the days-to-cover ratio (short ratio) jumped to 3.82.

Which companies own the most shares of ASP Isotopes Inc (ASPI)?

In terms of ASP Isotopes Inc share price expectations, FactSet research, analysts set an average price target of 14 in the next 12 months, up nearly 92.57% from the previous closing price of $7.27. Analysts anticipate ASP Isotopes Inc stock to reach 15 by 2026, with the lowest price target being 13. In spite of this, 1 analysts ranked ASP Isotopes Inc stock as Buy at the end of 2026.

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