Avidity Biosciences Ownership | Who Owns Avidity Biosciences?

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Avidity Biosciences Ownership Summary

Avidity Biosciences is owned by 49.29% institutional investors, 3.72% insiders, and 46.99% retail investors. Fmr is the largest institutional shareholder, holding 16.65% of RNA shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 4.27% of its assets in Avidity Biosciences shares.

RNA Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Avidity Biosciences	49.29%	3.72%	46.99%
Sector	Healthcare Stocks	232.20%	10.74%	-142.94%
Industry	Biotech Stocks	382.11%	10.55%	-292.66%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	21.59M	16.65%	$940.50M
Vanguard group	13.65M	9.90%	$984.52M
Blackrock	8.62M	9.89%	$352.23M
Blackrock funding, inc. /de	12.85M	9.32%	$926.93M
Rtw investments, lp	11.37M	8.77%	$495.51M
Wellington management group llp	10.07M	7.76%	$438.54M
Price t rowe associates inc /md/	9.79M	7.55%	$426.44M
Ra capital management	8.64M	6.67%	$376.49M
Avoro capital advisors	7.64M	5.90%	$333.09M
Janus henderson group	7.05M	5.72%	$205.13M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Alethea capital management	446.13K	15.62%	$32.18M
Cibra capital	53.21K	6.59%	$3.84B
Casdin capital	1.78M	6.47%	$77.55M
Rtw investments, lp	11.37M	6.11%	$495.51M
Bioimpact capital	760.02K	5.42%	$33.11M
Athos capital	184.56K	5.10%	$13.31M
Ra capital management	8.64M	4.64%	$376.49M
Avoro capital advisors	7.64M	4.31%	$333.09M
Alpine associates management	867.53K	4.16%	$62.57M
Boxer capital	1.73M	3.72%	$70.56M

Top Buyers

Holder	Shares	% Assets	Change
Fmr	21.59M	0.05%	5.40M
Blackrock funding, inc. /de	12.85M	0.02%	3.65M
Norges bank	3.05M	0.02%	3.05M
Blackrock	8.62M	0.01%	2.46M
Janus henderson group	7.05M	0.10%	2.16M

Top Sellers

Holder	Shares	% Assets	Change
Cowen and company	-	-	-5.13M
Toronto dominion bank	-	-	-3.53M
Siren	-	-	-1.29M
Pictet asset management sa	83.71K	0.01%	-1.25M
Fiera capital	-	-	-1.20M

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	3.05M	0.02%	3.05M	$219.74M
Bellevue group	2.15M	1.95%	2.15M	$93.80M
Alpine associates management	867.53K	4.16%	867.53K	$62.57M
Soros fund management	840.98K	0.70%	840.98K	$60.66M
Suvretta capital management	750.00K	0.84%	750.00K	$32.68M

Sold Out

Holder	Change
Twin peaks wealth advisors	-3.00
Wealthspire advisors	-4.00
Ronald blue trust	-8.00
Hollencrest capital management	-10.00
Nelson, van denburg & campbell wealth management group	-15.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	226	-23.39%	67,965,698	-57.78%	49	0.32%	133	-34.48%	57	1.79%
Sep 30, 2025	164	-23.72%	64,667,711	-52.44%	49	0.45%	117	6.36%	37	-51.32%
Jun 30, 2025	214	-6.96%	135,949,346	3.28%	104	1.01%	109	-16.15%	76	16.92%
Mar 31, 2025	231	-7.23%	133,386,370	4.47%	103	0.96%	130	-7.14%	65	-12.16%
Dec 31, 2024	106	-57.77%	39,596,419	-68.40%	32	0.31%	62	-60.00%	30	-52.38%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	5.49M	4.27%	109.14K
Fidelity Growth Compy Commingled Pl O	4.86M	4.11%	-69.00K
US Small-Cap Growth II Equity Comp	3.95M	3.28%	-484.27K
Fidelity Growth Company Fund	3.99M	3.10%	77.74K
Vanguard US Total Market Shares ETF	3.53M	2.93%	3.12K
Vanguard Total Stock Mkt Idx Inv	4.54M	2.92%	10.44K
T. Rowe Price New Horizons	3.54M	2.75%	-414.46K
Vanguard Health Care Inv	2.83M	2.35%	-196.40K
Vanguard Small Cap Index	3.24M	2.09%	-478.00
iShares Russell 2000 ETF	2.77M	1.79%	1.72M

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jan 21, 2026	Hughes Steven George	Chief Medical Officer	Sell	$208.51K
Jan 21, 2026	Hughes Steven George	Chief Medical Officer	Sell	$146.13K
Jan 21, 2026	Boyce Sarah	President and CEO	Sell	$463.25K
Jan 21, 2026	Boyce Sarah	President and CEO	Sell	$579.09K
Jan 21, 2026	Flanagan W. Michael	Chief Scientific Officer	Sell	$288.06K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	18
2025 Q4	-	3
2025 Q3	-	23
2025 Q2	-	5
2025 Q1	-	23

RNA Ownership FAQ

Who Owns Avidity Biosciences?

Avidity Biosciences shareholders are primarily institutional investors at 49.29%, followed by 3.72% insiders and 46.99% retail investors. The average institutional ownership in Avidity Biosciences's industry, Biotech Stocks , is 382.11%, which Avidity Biosciences falls below.

Who owns the most shares of Avidity Biosciences?

Avidity Biosciences’s largest shareholders are Fmr (21.59M shares, 16.65%), Vanguard group (13.65M shares, 9.90%), and Blackrock (8.62M shares, 9.89%). Together, they hold 36.44% of Avidity Biosciences’s total shares outstanding.

Does Blackrock own Avidity Biosciences?

Yes, BlackRock owns 9.89% of Avidity Biosciences, totaling 8.62M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 352.23M$. In the last quarter, BlackRock increased its holdings by 2.46M shares, a 39.84% change.

Who is Avidity Biosciences’s biggest shareholder by percentage of total assets invested?

Alethea capital management is Avidity Biosciences’s biggest shareholder by percentage of total assets invested, with 15.62% of its assets in 446.13K Avidity Biosciences shares, valued at 32.18M$.

Who is the top mutual fund holder of Avidity Biosciences shares?

Fidelity Growth Compy Commingled Pl S is the top mutual fund holder of Avidity Biosciences shares, with 4.27% of its total shares outstanding invested in 5.49M Avidity Biosciences shares.

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