Adverum Biotechnologies, Inc. - Common Stock, par value $0.0001 per share (ADVM)

Q: What does CUSIP 00773U108 represent in this 13F holders report?

CUSIP 00773U108 is the security identifier for ADVM - Adverum Biotechnologies, Inc. - Common Stock, par value $0.0001 per share used to aggregate holder disclosures.

Q: How many institutions held ADVM - Adverum Biotechnologies, Inc. - Common Stock, par value $0.0001 per share in Q1 2021?

131 institutional investors reported ADVM - Adverum Biotechnologies, Inc. - Common Stock, par value $0.0001 per share for Q1 2021. Use the holders table for investor-level position and value details.

CUSIP: 00773U108

Q1 2021 13F Holders as of 31 Mar 2021

Security type / class: Equity / Common Stock, par value $0.0001 per share
Total 13F shares: 95,104,058
Total 13F value: $937,859,079
Share change: +923,679
Put/Call ratio: 364%
SEC-reported price per share: $9.86
Number of holders: 131
Value change: +$7,873,874
Number of buys: 51
Number of sells: 78
Shares outstanding: 22,163,711

Security key

00773U108

Report period

Q1 2021

Institutions

131

Top holders

ADVM full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2021 Previous quarter: Q4 2020 Adverum Biotechnologies, Inc. SEC filings Adverum Biotechnologies, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 00773U108

Newer quarter: Q2 2021 Previous quarter: Q4 2020

Recent filing periods:

Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024

Ownership snapshot

Top reported holders of ADVM - Adverum Biotechnologies, Inc. - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

RA CAPITAL MANAGEMENT, L.P.

Disclosed value leader

RA CAPITAL MANAGEMENT, L.P.

Comparable rows

15/15

Latest evidence

31 Dec 2020

13F Lead comparable stake: 43% Showing 1-6 of 15 holder rows.

Quick read

RA CAPITAL MANAGEMENT, L.P. leads the comparable SEC ownership view at 43%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens RA CAPITAL MANAGEMENT, L.P.'s linked filing trail.

Comparable ownership Top 5

RA CAPITAL MANAGEMENT, L.P. 43%

Avoro Capital Advisors LLC 36%

RTW INVESTMENTS, LP 33%

BlackRock Finance, Inc. 32%

ORBIMED ADVISORS LLC 25%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
RA CAPITAL MANAGEMENT, L.P.	13F Company 13F	43%	$103,006,000 9,502,383 shares	—	31 Dec 2020
Avoro Capital Advisors LLC	13F Company 13F	36%	$86,720,000 8,000,000 shares	—	31 Dec 2020
RTW INVESTMENTS, LP	13F Company 13F	33%	$78,345,000 7,227,364 shares	—	31 Dec 2020
BlackRock Finance, Inc.	13F Company 13F	32%	$76,343,000 7,042,768 shares	—	31 Dec 2020
ORBIMED ADVISORS LLC	13F Company 13F	25%	$59,632,000 5,501,144 shares	—	31 Dec 2020
Sonic Fund II, L.P.	13F Company 13F	23%	$55,303,000 5,101,787 shares	—	31 Dec 2020

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2021

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

131

95,104,058

Rows available

131

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2021 vs Q4 2020 Across Filers

Q4 2020 holders

152

Q1 2021 holders

131

Holder diff

-21

Investor	Q4 2020 Shares	Q1 2021 Shares	Share Diff	Share Chg %	Q4 2020 value	Q1 2021 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend