What does CUSIP 55955D100 represent in this 13F holders report?

CUSIP 55955D100 is the security identifier for MGNI - MAGNITE, INC. - COMMON STOCK used to aggregate holder disclosures.

How many institutions held MGNI - MAGNITE, INC. - COMMON STOCK in Q1 2023?

217 institutional investors reported MGNI - MAGNITE, INC. - COMMON STOCK for Q1 2023. Use the holders table for investor-level position and value details.

MAGNITE, INC. - COMMON STOCK (MGNI)

CUSIP: 55955D100

Q1 2023 13F Holders as of 31 Mar 2023

Security type / class: Equity / COMMON STOCK
Total 13F shares: 96,353,092
Total 13F value: $892,115,344
Share change: +3,065,214
Put/Call ratio: 208%
SEC-reported price per share: $9.26
Number of holders: 217
Value change: +$22,211,875
Number of buys: 102
Number of sells: 108
Shares outstanding: 143,693,070

Security key

55955D100

Report period

Q1 2023

Institutions

217

Top holders

MGNI full security history Ownership snapshot Full 13F holder table MAGNITE, INC. SEC filings MAGNITE, INC. company facts

Broader feeds

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

Ownership snapshot

Top reported holders of MGNI - MAGNITE, INC. - COMMON STOCK (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

VANGUARD GROUP INC

Disclosed value leader

VANGUARD GROUP INC

Comparable rows

15/15

Latest evidence

31 Dec 2022

13F Lead comparable stake: 8.7% Showing 1-6 of 15 holder rows.

Quick read

VANGUARD GROUP INC leads the comparable SEC ownership view at 8.7%.

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 VANGUARD GROUP INC's linked filing trail.

Comparable ownership Top 5

VANGUARD GROUP INC 8.7%

Granahan Investment Management, LLC 7.3%

BlackRock Finance, Inc. 6.2%

Edenbrook Capital, LLC 4.8%

FMR LLC 4.3%

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
VANGUARD GROUP INC	13F Company 13F	8.7%	$131,706,760 12,436,899 shares	—	31 Dec 2022
Granahan Investment Management, LLC	13F Company 13F	7.3%	$110,707,330 10,453,950 shares	—	31 Dec 2022
BlackRock Finance, Inc.	13F Company 13F	6.2%	$93,677,943 8,845,887 shares	—	31 Dec 2022
Edenbrook Capital, LLC	13F Company 13F	4.8%	$72,997,706 6,893,079 shares	—	31 Dec 2022
FMR LLC	13F Company 13F	4.3%	$64,911,733 6,129,531 shares	—	31 Dec 2022
Bank of New York Mellon Corp	13F Company 13F	2.4%	$36,911,318 3,485,488 shares	—	31 Dec 2022

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 2023

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

Institutions

217

96,353,092

Rows available

217

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 2023 vs Q1 2023 Across Filers

Q1 2023 holders

217

Q1 2023 holders

217

Holder diff

Investor	Q1 2023 Shares	Q1 2023 Shares	Share Diff	Share Chg %	Q1 2023 value	Q1 2023 value	Value change	Value Chg %