- Type / Class
- Equity / COMMON STOCK
- Shares outstanding
- 145,400,599
- Total 13F shares
- 138,012,684
- Share change
- -9,036,178
- Total reported value
- $3,003,860,929
- Put/Call ratio
- 74%
- Price per share
- $21.78
- Number of holders
- 313
- Value change
- -$207,225,719
- Number of buys
- 148
- Number of sells
- 165
Quarterly Holders Quick Answers
What is CUSIP 55955D100?
CUSIP 55955D100 identifies MGNI - MAGNITE, INC. - COMMON STOCK in SEC institutional holdings data.
Need full ownership history?
Open the full security ownership history page.
Next holder-history checks
These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.
- Back to full security ownership history for the broader multi-quarter picture.
- Latest 13F filings for newly reported positions across managers.
- Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
- SEC investors directory for manager drilldown.
Explore More Reporting Periods
Jump to adjacent filing periods for faster comparison and easier crawl discovery.
Recent filing periods for CUSIP 55955D100:
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 |
|---|---|---|---|---|---|---|---|---|
| FMR LLC |
13F
|
Company |
12%
|
17,185,939
|
$414,524,847 | — | 30 Jun 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
9.3%
|
13,562,285
|
$327,122,315 | — | 30 Jun 2025 | |
| Capital Research Global Investors |
13F
|
Company |
8.9%
|
12,920,070
|
$311,632,088 | — | 30 Jun 2025 | |
| BlackRock, Inc. |
13F
|
Company |
7.4%
|
10,698,044
|
$258,036,830 | — | 30 Jun 2025 | |
| Boston Partners |
13F
|
Company |
3.8%
|
5,574,604
|
$133,037,082 | — | 30 Jun 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
3.7%
|
5,447,837
|
$131,401,828 | — | 30 Jun 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
3.4%
|
4,901,833
|
$118,200,203 | — | 30 Jun 2025 | |
| AMERICAN CENTURY COMPANIES INC |
13F
|
Company |
3.3%
|
4,829,197
|
$116,480,255 | — | 30 Jun 2025 | |
| Granahan Investment Management, LLC |
13F
|
Company |
2.5%
|
3,642,786
|
$87,863,998 | — | 30 Jun 2025 | |
| Edenbrook Capital, LLC |
13F
|
Company |
2.5%
|
3,609,972
|
$87,072,524 | — | 30 Jun 2025 | |
| Nuveen, LLC |
13F
|
Company |
2.2%
|
3,251,092
|
$78,416,340 | — | 30 Jun 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.2%
|
3,216,842
|
$77,597,494 | — | 30 Jun 2025 | |
| STATE STREET CORP |
13F
|
Company |
2.1%
|
3,053,607
|
$73,653,001 | — | 30 Jun 2025 | |
| Nine Ten Capital Management LLC |
13F
|
Company |
2%
|
2,858,583
|
$68,949,000 | — | 30 Jun 2025 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
1.9%
|
2,782,178
|
$67,106,133 | — | 30 Jun 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
1.3%
|
1,915,400
|
$46,199,448 | — | 30 Jun 2025 | |
| Schonfeld Strategic Advisors LLC |
13F
|
Company |
1.3%
|
1,900,598
|
$45,842,422 | — | 30 Jun 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
1.2%
|
1,798,240
|
$43,373,556 | — | 30 Jun 2025 | |
| FRONTIER CAPITAL MANAGEMENT CO LLC |
13F
|
Company |
1.2%
|
1,793,830
|
$43,267,187 | — | 30 Jun 2025 | |
| NOMURA ASSET MANAGEMENT CO LTD |
13F
|
Company |
1.2%
|
1,740,741
|
$41,986,673 | — | 30 Jun 2025 | |
| UBS Group AG |
13F
|
Company |
1.2%
|
1,733,218
|
$41,805,218 | — | 30 Jun 2025 | |
| Maestria Partners LLC |
13F
|
Company |
0.99%
|
1,434,317
|
$34,595,726 | — | 30 Jun 2025 | |
| Stephens Investment Management Group LLC |
13F
|
Company |
0.93%
|
1,350,096
|
$32,564,316 | — | 30 Jun 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.92%
|
1,339,871
|
$32,317,689 | — | 30 Jun 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.81%
|
1,170,555
|
$28,233,809 | — | 30 Jun 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.78%
|
1,139,541
|
$27,485,729 | — | 30 Jun 2025 | |
| ROYCE & ASSOCIATES LP |
13F
|
Company |
0.74%
|
1,077,906
|
$25,999,093 | — | 30 Jun 2025 | |
| APIS CAPITAL ADVISORS, LLC |
13F
|
Company |
0.72%
|
1,048,000
|
$25,277,760 | — | 30 Jun 2025 | |
| GRIZZLYROCK CAPITAL, LLC |
13F
|
Company |
0.67%
|
974,323
|
$23,500,671 | — | 30 Jun 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.65%
|
938,088
|
$22,626,683 | — | 30 Jun 2025 | |
| KENNEDY CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.6%
|
869,147
|
$20,963,826 | — | 30 Jun 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.57%
|
835,102
|
$20,142,660 | — | 30 Jun 2025 | |
| SILVERCREST ASSET MANAGEMENT GROUP LLC |
13F
|
Company |
0.55%
|
804,247
|
$19,398,438 | — | 30 Jun 2025 | |
| Pacer Advisors, Inc. |
13F
|
Company |
0.54%
|
791,819
|
$19,098,674 | — | 30 Jun 2025 | |
| Penn Capital Management Company, LLC |
13F
|
Company |
0.51%
|
747,834
|
$18,086,739 | — | 30 Jun 2025 | |
| Meros Investment Management, LP |
13F
|
Company |
0.48%
|
702,142
|
$16,935,665 | — | 30 Jun 2025 | |
| BALYASNY ASSET MANAGEMENT L.P. |
13F
|
Company |
0.48%
|
699,932
|
$16,882,360 | — | 30 Jun 2025 | |
| HARBOR CAPITAL ADVISORS, INC. |
13F
|
Company |
0.44%
|
634,147
|
$15,296,000 | — | 30 Jun 2025 | |
| First Eagle Investment Management, LLC |
13F
|
Company |
0.43%
|
618,119
|
$14,909,030 | — | 30 Jun 2025 | |
| Universal- Beteiligungs- und Servicegesellschaft mbH |
13F
|
Individual |
0.42%
|
614,317
|
$14,817,327 | — | 30 Jun 2025 | |
| J. Goldman & Co LP |
13F
|
Company |
0.42%
|
603,683
|
$14,560,834 | — | 30 Jun 2025 | |
| Verition Fund Management LLC |
13F
|
Company |
0.41%
|
595,495
|
$14,363,339 | — | 30 Jun 2025 | |
| Dana Investment Advisors, Inc. |
13F
|
Company |
0.4%
|
585,915
|
$14,132,269 | — | 30 Jun 2025 | |
| KING LUTHER CAPITAL MANAGEMENT CORP |
13F
|
Company |
0.39%
|
560,786
|
$13,526,158 | — | 30 Jun 2025 | |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC |
13F
|
Company |
0.37%
|
543,277
|
$13,103,842 | — | 30 Jun 2025 | |
| OBERWEIS ASSET MANAGEMENT INC/ |
13F
|
Company |
0.35%
|
514,000
|
$12,397,680 | — | 30 Jun 2025 | |
| NEW YORK STATE COMMON RETIREMENT FUND |
13F
|
Company |
0.34%
|
493,225
|
$11,896,587 | — | 30 Jun 2025 | |
| Norwood Investment Partners, LP |
13F
|
Company |
0.32%
|
462,000
|
$11,143,440 | — | 30 Jun 2025 | |
| Kopion Asset Management, LLC |
13F
|
Company |
0.29%
|
423,178
|
$10,207,053 | — | 30 Jun 2025 | |
| Alta Park Capital, LP |
13F
|
Company |
0.28%
|
413,602
|
$9,976,080 | — | 30 Jun 2025 |
Institutional Holders of MAGNITE, INC. - COMMON STOCK (MGNI) as of Q3 2025
As of 30 Sep 2025,
MAGNITE, INC. - COMMON STOCK (MGNI) was held by
313 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
138,012,684 shares.
The largest 10 holders included
FMR LLC, VANGUARD GROUP INC, BlackRock, Inc., Capital Research Global Investors, WELLINGTON MANAGEMENT GROUP LLP, AMERICAN CENTURY COMPANIES INC, Boston Partners, Granahan Investment Management, LLC, DIMENSIONAL FUND ADVISORS LP, and GEODE CAPITAL MANAGEMENT, LLC.
This page lists
314
institutional shareholders reporting positions in this security
for the Q3 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
285
Q3 2025 holders
313
Holder diff
28
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 Value $ | Q3 2025 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.
An asterisk sign (*) next to the price indicates that the price is likely invalid.