Security key
55955D100
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 132,644,878
- Total 13F value
- $1,513,348,970
- Share change
- +9,603,421
- Put/Call ratio
- 139%
- SEC-reported price per share
- $11.41
- Number of holders
- 290
- Value change
- +$97,506,469
- Number of buys
- 151
- Number of sells
- 138
- Shares outstanding
- 143,436,829
Holder snapshot
7 signals
Show 1 more signal
Security identity
1 source field
Report period
Q1 2025
Institutions
290
Top holders
10
MGNI full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2025
Previous quarter: Q4 2024
MAGNITE, INC. SEC filings
MAGNITE, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 55955D100
Recent filing periods:
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 2024
13F
Lead comparable stake: 9.5%
Showing 1-6 of 15 holder rows.
Quick read
VANGUARD GROUP INC leads the comparable SEC ownership view at 9.5%.
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.
Comparable ownership
Top 5
VANGUARD GROUP INC
9.5%
BlackRock, Inc.
7.1%
Capital Research Global Investors
5.4%
WELLINGTON MANAGEMENT GROUP LLP
4.9%
DIMENSIONAL FUND ADVISORS LP
3.9%
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
|
9.5%
|
$216,593,256
13,605,104 shares
|
— | 31 Dec 2024 |
| BlackRock, Inc. |
13F
Company
|
7.1%
|
$161,862,507
10,167,243 shares
|
— | 31 Dec 2024 |
| Capital Research Global Investors |
13F
Company
|
5.4%
|
$122,985,741
7,725,235 shares
|
— | 31 Dec 2024 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
4.9%
|
$111,917,776
7,030,011 shares
|
— | 31 Dec 2024 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
3.9%
|
$87,956,686
5,524,643 shares
|
— | 31 Dec 2024 |
| Boston Partners |
13F
Company
|
3.3%
|
$76,060,999
4,756,323 shares
|
— | 31 Dec 2024 |
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 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
290
Shares
132,644,878
Rows available
290
| 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 2025 vs Q4 2024 Across Filers
Q4 2024 holders
283
Q1 2025 holders
290
Holder diff
7
| Investor | Q4 2024 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q4 2024 value | Q1 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend