Decoy Therapeutics Inc. (DCOY) Ownership

NASDAQ: DCOYTop holders, insider trades and short interest.

DCOY ownership summary

as of October 18, 2026
Institutions
2.7%
of shares outstanding
Insiders
2.87%
of shares outstanding
Shares outstanding
2.4M
Float
586K
shares available to trade
Short interest
23.05%
150K shares short
Days to cover
0.02
short interest up 1,321.2% vs prior month
  • Institutions 2.66%
  • Insiders 2.87%
  • Other investors 94.48%

DCOY top institutional holders

12 largest
Decoy Therapeutics Inc. top institutional holders
#Holder% of sharesSharesValueChangeReported
1Vanguard Capital Management, LLC0.76%4,034$4,720+4,034 (0.0%)June 30, 2026
2Tower Research Capital LLC0.05%256$300−765 (−74.9%)June 30, 2026
3UBS Group AG<0.01%25$29−521 (−95.4%)June 30, 2026
4Caitong International Asset Management Co., Limited.<0.01%2$2+2 (0.0%)June 30, 2026
5Danske Bank A/S.0.00%——−2 (−100.0%)March 31, 2026
6Morgan Stanley - Brokerage Accounts0.00%——−1 (−100.0%)June 30, 2026
7Advisory Services Network, LLC0.00%——−41 (−100.0%)June 30, 2026
8Warberg Asset Management LLC0.00%——−28,000 (−100.0%)March 31, 2026
9Geode Capital Management, LLC0.00%——−10,922 (−100.0%)March 31, 2026
10Advisor Group Holdings, Inc.0.00%——−3 (−100.0%)March 31, 2026
11XTX Topco Ltd0.00%——−10,941 (−100.0%)March 31, 2026
12Bank of America Corp0.00%——−36 (−100.0%)March 31, 2026

Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 12, 2 holders added 4,036 shares and 10 cut 51K.

DCOY top mutual fund and ETF holders

3 largest
Decoy Therapeutics Inc. top fund holders
#Holder% of sharesSharesValueChangeReported
1Fidelity Extended Market Index1.43%7,614$8,908+4,710 (+162.2%)August 31, 2026
2Fidelity Series Total Market Index0.09%477$558—August 31, 2026
3Horizon Kinetics Medical ETF<0.01%20$23—September 30, 2026

Funds report holdings monthly or quarterly; dates differ by fund.

DCOY shares outstanding

Shares outstanding

Year-end shares outstanding, adjusted for splits.

Who owns DCOY

Institutional investors own 2.7% of Decoy Therapeutics's shares and insiders 2.87%. The largest holder is Vanguard Capital Management, LLC with 0.76% of the shares (4,034), as of June 30, 2026. Among the top 12 institutions, 2 added shares and 10 reduced their stake in the latest filings. Short interest is 23.05% of the float, or 0.02 days of average trading volume. The share count rose 26,655.6% since 2014.

Related: DCOY analyst forecast, DCOY key metrics. See the DCOY stock overview for the latest quote and news.

DCOY ownership FAQ

Who owns the most Decoy Therapeutics stock?

The largest shareholders of Decoy Therapeutics are Vanguard Capital Management, LLC (0.76%), Tower Research Capital LLC (0.05%), UBS Group AG (<0.01%), Caitong International Asset Management Co., Limited. (<0.01%), Danske Bank A/S. (0.00%).

What percentage of Decoy Therapeutics is owned by institutions?

Institutions hold 2.7% of Decoy Therapeutics's shares outstanding; insiders hold 2.87%.

Which funds own Decoy Therapeutics?

The largest fund holders of Decoy Therapeutics are Fidelity Extended Market Index (1.43%), Fidelity Series Total Market Index (0.09%), Horizon Kinetics Medical ETF (<0.01%).

What is Decoy Therapeutics's short interest?

150K shares of Decoy Therapeutics were sold short, 23.05% of the float; at the average daily volume it would take 0.02 days to cover.

How many shares of Decoy Therapeutics are outstanding?

Decoy Therapeutics has 2.4M shares outstanding, of which 586K are in the public float.

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