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ACET · NASDAQ

$4.52−$0.01 (−0.22%)TodayMarket closed ·
Prev close $4.53

Who owns ACET

Largest institutional holders, from their latest 13F filings

The 10 largest institutions hold 46.7% of ACET’s shares.

  • RA Capital Management, LP10.0%
  • OrbiMed Advisors, LLC9.0%
  • Franklin Advisers, Inc.6.7%
  • Citadel Advisors LLC4.6%
  • Next 6 largest institutions16.3%
  • All other shareholders53.3%
Top institutional holders of ACET
HolderShares% of shares
RA Capital Management, LP932.62K9.97%
OrbiMed Advisors, LLC844.79K9.04%
Franklin Advisers, Inc.626.57K6.70%
Citadel Advisors LLC432.74K4.63%
Vanguard Capital Management, LLC343.23K3.67%
Adage Capital Management, L.P.274.38K2.93%
Renaissance Technologies LLC265.94K2.84%
Stonepine Capital Management, LLC245.52K2.63%
Alyeska Investment Group, L.P.203.80K2.18%
Schonfeld Strategic Advisors LLC195.51K2.09%

Largest mutual fund holders

Top mutual fund holders of ACET
HolderShares% of shares
Franklin Templeton Investment Funds -Biotechnology Discovery401.35K4.29%
Vanguard Total Stock Market Index Fund243.23K2.60%
Franklin Biotechnology Discovery Fund225.19K2.41%
Vanguard Extended Market Index Fund98.91K1.06%
Bridgeway Ultra-Small Company Fund85.96K0.92%

Insider trades

Form 4 filings by officers, directors and large holders

Insiders made no open-market buys or sales of ACET in the last 6 months.

Latest ACET insider transactions
InsiderTypeSharesValue
Klickstein LloydAward18.30K—
Peng KatieAward4.20K—
Klickstein LloydAward4.20K—
Sinclair AndrewAward4.20K—
Grissinger MichaelAward4.20K—
Chodakewitz JeffreyAward4.20K—
DUBIN STEVEAward4.20K—
Aftab BlakeAward55.00K—
Schor ChenAward55.00K—
RA Capital Healthcare Fund LPOther250.00K—

Short interest

Settled Sep 30, 2026

Shares short
485.47K
Days to cover
1.10
% of shares outstanding
5.19%
Average daily volume
439.51K
Change since last report
+78.5%

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