AILERON THERAPEUTICS INC (ALRN) Institutional Ownership Changes & 13F Activity

AILERON THERAPEUTICS INC (ALRN). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Cable Car Capital, Lp, Adar1 Capital Management, Llc, Ikarian Capital, Llc, Great Point Partners Llc, and Citadel Advisors Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Citadel Advisors LlcBuy+2,438,7112,438,711$2.54MQ2 2026Sep 02, 2026
Mercer Global Advisors IncBuy+15,000+42.3%50,461$52.48KQ2 2026Aug 19, 2026
Stonepine Capital Management, LlcBuy+218,038218,038$226.76KQ2 2026Aug 17, 2026
Cable Car Capital, LpBuy+4,775,000+1136.9%5,195,000$5.40MQ2 2026Aug 14, 2026
Adar1 Capital Management, LlcBuy+4,500,0004,500,000$4.68MQ2 2026Aug 14, 2026
Ikarian Capital, LlcBuy+2,950,0002,950,000$3.07MQ2 2026Aug 14, 2026
Great Point Partners LlcBuy+2,575,0002,575,000$2.68MQ2 2026Aug 14, 2026
Velan Capital Investment Management LpBuy+1,700,0001,700,000$1.77MQ2 2026Aug 14, 2026
Bios Capital Management, LpBuy+1,000,000+50.4%2,982,375$3.10MQ2 2026Aug 14, 2026
Senvest Management, LlcBuy+1,000,000+433.1%1,230,895$1.28MQ2 2026Aug 14, 2026
Boothbay Fund Management, LlcBuy+889,450889,450$925.03KQ2 2026Aug 14, 2026
Voss Capital, LpBuy+873,559+19.9%5,261,921$5.47MQ2 2026Aug 14, 2026
Prosight Management, LpBuy+688,400+167.2%1,100,000$1.14MQ2 2026Aug 14, 2026
Corsair Capital Management, L.P.Buy+80,00080,000$83.20KQ2 2026Aug 14, 2026
Goldman Sachs Group IncBuy+79,78579,785$82.98KQ2 2026Aug 14, 2026
Qube Research & Technologies LtdBuy+30,78730,787$32.02KQ2 2026Aug 14, 2026
Xtx Topco LtdBuy+12,836+39.0%45,760$47.59KQ2 2026Aug 14, 2026
Barclays PlcBuy+2,5702,570$2.67KQ2 2026Aug 14, 2026
Vanguard Capital Management LlcBuy+2,379,389+238.3%3,377,910$3.51MQ2 2026Aug 13, 2026
Bleichroeder LpBuy+1,000,0001,000,000$1.04MQ2 2026Aug 13, 2026
Vanguard Fiduciary Trust CoBuy+228,003+147.6%382,515$397.82KQ2 2026Aug 13, 2026
Northern Trust CorpBuy+95,584+149.0%159,720$166.11KQ2 2026Aug 13, 2026
Ubs Group AgBuy+56,386+5506.4%57,410$59.71KQ2 2026Aug 13, 2026
Morgan StanleyBuy+14,31814,318$14.89KQ2 2026Aug 13, 2026
Renaissance Technologies LLCSell-5,500-22.4%19,000$19.76KQ2 2026Aug 13, 2026
Geode Capital Management, LlcBuy+388,449+112.7%733,139$762.54KQ2 2026Aug 12, 2026
Cetera Investment AdvisersBuy+11,74211,742$12.21KQ2 2026Aug 12, 2026
Empery Asset Management, LpBuy+370,834370,834$385.67KQ2 2026Aug 11, 2026
Warberg Asset Management LlcBuy+99,00099,000$100.98KQ2 2026Aug 11, 2026
Savant Capital, LlcBuy+30,52830,528$23.32KQ2 2026Aug 10, 2026
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Frequently asked questions about ALRN activity

  • Which institutional owners are buying ALRN?

    Institutional owners buying ALRN include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ALRN activity?

    "Buy" means an investor increased their reported position in ALRN compared to the prior reporting period. This reflects growing exposure to AILERON THERAPEUTICS INC (ALRN) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ALRN increasing?

    Institutional interest in ALRN can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.