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 Q4 2020?

235 institutional investors reported MGNI - MAGNITE, INC. - Common Stock for Q4 2020. Use the holders table for investor-level position and value details.

MAGNITE, INC. - Common Stock (MGNI)

CUSIP: 55955D100

Q4 2020 13F Holders as of 31 Dec 2020

Type / Class: Equity / Common Stock
Shares outstanding: 143,558,767
Total 13F shares: 76,786,392
Share change: -6,830,136
Total reported value: $2,357,551,419
Put/Call ratio: 72%
Price per share: $30.71
Number of holders: 235
Value change: +$83,965,902
Number of buys: 142
Number of sells: 96

Quarterly Holders Quick Answers

What is CUSIP 55955D100?
CUSIP 55955D100 identifies MGNI - MAGNITE, INC. - Common Stock in SEC institutional holdings data.

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Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q1 2021
Previous quarter: Q3 2020

Recent filing periods for CUSIP 55955D100:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of MGNI - MAGNITE, INC. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Granahan Investment Management, LLC	13F	Company	7%	10,023,076	$69,610,000	—	30 Sep 2020	13F
BlackRock Finance, Inc.	13F	Company	5.2%	7,454,864	$51,775,000	—	30 Sep 2020	13F
VANGUARD GROUP INC	13F	Company	3.5%	5,095,825	$35,390,000	—	30 Sep 2020	13F
Nine Ten Capital Management LLC	13F	Company	3.5%	4,964,934	$34,481,000	—	30 Sep 2020	13F
Edenbrook Capital, LLC	13F	Company	3.2%	4,599,708	$31,945,000	—	30 Sep 2020	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	3%	4,326,109	$30,045,000	—	30 Sep 2020	13F
ROYCE & ASSOCIATES LP	13F	Company	2.1%	2,950,845	$20,494,000	—	30 Sep 2020	13F
STATE STREET CORP	13F	Company	2%	2,828,477	$19,644,000	—	30 Sep 2020	13F
CANNELL CAPITAL LLC	13F	Company	1.9%	2,670,675	$18,548,000	—	30 Sep 2020	13F
General Industrial Partners LLP	13F	Company	1.4%	2,007,872	$13,945,000	—	30 Sep 2020	13F
COOPER CREEK PARTNERS MANAGEMENT LLC	13F	Company	1.3%	1,801,768	$12,513,000	—	30 Sep 2020	13F
ASHFORD CAPITAL MANAGEMENT INC	13F	Company	1.1%	1,529,034	$10,619,000	—	30 Sep 2020	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1%	1,486,062	$10,320,000	—	30 Sep 2020	13F
Manatuck Hill Partners, LLC	13F	Company	1%	1,484,558	$10,310,000	—	30 Sep 2020	13F
NORTHERN TRUST CORP	13F	Company	0.9%	1,285,246	$8,926,000	—	30 Sep 2020	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.89%	1,282,481	$8,907,000	—	30 Sep 2020	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	0.84%	1,202,955	$8,354,523	—	30 Sep 2020	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.8%	1,145,727	$7,957,000	—	30 Sep 2020	13F
ProShare Advisors LLC	13F	Company	0.76%	1,089,665	$7,568,000	—	30 Sep 2020	13F
Nishkama Capital, LLC	13F	Company	0.7%	1,004,000	$6,973,000	—	30 Sep 2020	13F
Nuveen Asset Management, LLC	13F	Company	0.65%	930,787	$6,465,000	—	30 Sep 2020	13F
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	13F	Company	0.64%	918,523	$6,379,000	—	30 Sep 2020	13F
Impax Asset Management Group plc	13F	Company	0.6%	867,028	$6,022,000	—	30 Sep 2020	13F
P.A.W. CAPITAL CORP	13F	Company	0.56%	800,000	$5,556,000	—	30 Sep 2020	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.5%	711,918	$4,945,000	—	30 Sep 2020	13F
KING LUTHER CAPITAL MANAGEMENT CORP	13F	Company	0.49%	703,193	$4,884,000	—	30 Sep 2020	13F
NORDEA INVESTMENT MANAGEMENT AB	13F	Company	0.5%	721,392	$4,869,000	—	30 Sep 2020	13F
LORD, ABBETT & CO. LLC	13F	Company	0.47%	672,462	$4,670,000	—	30 Sep 2020	13F
Kopion Asset Management, LLC	13F	Company	0.46%	655,098	$4,550,000	—	30 Sep 2020	13F
Roumell Asset Management, LLC	13F	Company	0.44%	634,944	$4,410,000	—	30 Sep 2020	13F
KETTLE HILL CAPITAL MANAGEMENT, LLC	13F	Company	0.4%	570,392	$3,961,000	—	30 Sep 2020	13F
Acuitas Investments, LLC	13F	Company	0.37%	532,655	$3,699,000	—	30 Sep 2020	13F
Millrace Asset Group, Inc.	13F	Company	0.37%	524,102	$3,640,000	—	30 Sep 2020	13F
BOOTHBAY FUND MANAGEMENT, LLC	13F	Company	0.34%	494,471	$3,434,000	—	30 Sep 2020	13F
S Squared Technology, LLC	13F	Company	0.34%	488,086	$3,390,000	—	30 Sep 2020	13F
Ranger Investment Management, L.P.	13F	Company	0.32%	456,238	$3,169,000	—	30 Sep 2020	13F
FULLER & THALER ASSET MANAGEMENT, INC.	13F	Company	0.31%	446,309	$3,100,000	—	30 Sep 2020	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.31%	437,947	$3,042,000	—	30 Sep 2020	13F
Madison Asset Management, LLC	13F	Company	0.3%	435,871	$3,027,000	—	30 Sep 2020	13F
Bank of New York Mellon Corp	13F	Company	0.3%	434,886	$3,021,000	—	30 Sep 2020	13F
FRIESS ASSOCIATES LLC	13F	Company	0.29%	413,230	$2,870,000	—	30 Sep 2020	13F
CITADEL ADVISORS LLC	13F	Company	0.27%	388,683	$2,699,000	—	30 Sep 2020	13F
Squarepoint Ops LLC	13F	Company	0.26%	371,564	$2,581,000	—	30 Sep 2020	13F
JPMORGAN CHASE & CO	13F	Company	0.26%	379,426	$2,530,000	—	30 Sep 2020	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.24%	342,303	$2,377,000	—	30 Sep 2020	13F
WOODMONT INVESTMENT COUNSEL LLC	13F	Company	0.22%	319,928	$2,222,000	—	30 Sep 2020	13F
TWO SIGMA ADVISERS, LP	13F	Company	0.22%	311,702	$2,165,000	—	30 Sep 2020	13F
G2 Investment Partners Management LLC	13F	Company	0.21%	306,300	$2,127,000	—	30 Sep 2020	13F
PRIMECAP MANAGEMENT CO/CA/	13F	Company	0.21%	300,000	$2,083,000	—	30 Sep 2020	13F
PERKINS CAPITAL MANAGEMENT INC	13F	Company	0.19%	277,000	$1,924,000	—	30 Sep 2020	13F

Institutional Holders of MAGNITE, INC. - Common Stock (MGNI) as of Q4 2020

As of 31 Dec 2020, MAGNITE, INC. - Common Stock (MGNI) was held by 235 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 76,786,392 shares. The largest 10 holders included BlackRock Inc., GRANAHAN INVESTMENT MANAGEMENT INC/MA, VANGUARD GROUP INC, Allianz Asset Management GmbH, Ranger Investment Management, L.P., STATE STREET CORP, Nine Ten Capital Management LLC, DRIEHAUS CAPITAL MANAGEMENT LLC, Edenbrook Capital, LLC, and ROYCE & ASSOCIATES LP. This page lists 236 institutional shareholders reporting positions in this security for the Q4 2020 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q4 2020 vs Q3 2020 Across Filers

Q3 2020 holders

168

Q4 2020 holders

235

Holder diff

Investor	Q3 2020 Shares	Q4 2020 Shares	Share Diff	Share Chg %	Q3 2020 Value $	Q4 2020 Value $	Value Diff $	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.