Piper Sandler Cuts ASTS as Stock Drops 25% in a Week

The borrow market has tightened sharply since the October 7 note. Availability has fallen from 4.4% to just 5.1% on the headline reading, but the intra-week picture is more striking: on October 5 and 6 the lending pool nearly emptied again, with availability briefly dropping back below 1%. It has since recovered to 5.1%, still extremely tight, meaning fewer than six shares remain available for every hundred already lent out. The 52-week low is 0.31%, so the pool has been fully exhausted before. Cost to borrow has edged up 10% on the week to 1.41%, continuing a 30% climb over the past month, though in absolute terms it remains modest. Short interest itself has barely moved on the week, down 0.2% to 24.2% of the free float, but the month-on-month build of 14% remains significant. The ORTEX short score of 73.9 has actually eased slightly from the recent peak of 74.9 in late September, but the short score rank and utilization rank both remain in the 2nd percentile of the entire universe: this is still one of the most structurally challenged borrow situations in the market.

Options positioning offers a mild contrast to the bearish overall setup. The put/call ratio at 0.48 is fractionally below its 20-day average of 0.50, and the z-score of -0.67 shows no unusual defensive positioning. After the Piper Sandler cut and an 8.5% single-day drop, the absence of a spike in put buying is notable. The ratio has pulled back from a brief elevated reading around 0.55 to 0.56 earlier in the month. The 52-week range runs from 0.32 to 0.67, so current positioning sits in the lower half, suggesting options traders are not piling into downside protection at the same pace as the stock's decline.

The activist register remains a defining feature of the ownership structure. ASTS carries multiple Schedule 13D filers, a significant fact. AT&T holds a 13D position at 2.7%, American Tower at 0.84%, and Vodafone at 5.0% as of its last filing in February 2026 (having trimmed from 6.0%). Rakuten Mobile holds 5.3% as of May 2026, also reduced from 7.2%. CEO Abel Avellan's 13D stake remains at 20.8%. These are strategic holders with disclosed activist intent, not passive index money. As always with 13D/G filings, stakes are as last disclosed and a holder can fall below 5% without filing again. On the institutional side, BlackRock added 756,000 shares through September 30, and State Street added 948,000 in the same period, modest but consistent passive accumulation even as the stock fell.

Retail attention, as measured by Wikipedia page views, is running well below its own 90-day average, with a z-score of -2.1 as of early October, the lowest in the tracked window. That points to a withdrawal of retail interest into the decline rather than the kind of attention spike that typically precedes a short-squeeze dynamic.

ORTEX forecasts a 75% probability that ASTS will be deleted from the CRSP US Mid and CRSP US Large indexes at the December 2026 Quarterly Review, with the price that decides it sitting at $54.46. At $47.07, the stock is already 15.7% below that line. The combined flows at stake are approximately $159M of selling from index trackers if the deletion is confirmed. The rank date is December 4, with an announcement expected December 7. Separately, ORTEX puts a 75% chance on a share-count increase in the CRSP US Small index at the same review, a $201M buying flow from that segment. The net mechanical picture is therefore modestly negative if the current price level holds through the rank date.

With earnings on November 10 and the index rank date on December 4, the next four to six weeks carry two distinct catalysts: the question of whether the commercial ramp narrative can survive another quarterly update at current burn rates, and whether the stock price recovers enough to stay above the CRSP exit threshold.