Security key
55955D100
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 102,653,022
- Total 13F value
- $958,824,603
- Share change
- -1,595,638
- Put/Call ratio
- 263%
- SEC-reported price per share
- $9.34
- Number of holders
- 215
- Value change
- -$4,019,427
- Number of buys
- 84
- Number of sells
- 97
- Shares outstanding
- 143,916,476
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2023
Institutions
215
Top holders
10
MGNI full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2026
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
0/15
Latest evidence
30 Sep 2023
13F
Highest disclosed value: $93,811,956
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
VANGUARD GROUP INC has the largest disclosed position value at $93.81M.
0 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.
Disclosed position value
Top 5
VANGUARD GROUP INC
$93.81M
BlackRock Finance, Inc.
$69.57M
Granahan Investment Management, LLC
$54.32M
Edenbrook Capital, LLC
$44.1M
DIMENSIONAL FUND ADVISORS LP
$42.89M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
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
|
—
denominator unverified
|
$93,811,956
12,441,904 shares
|
— | 30 Sep 2023 |
| BlackRock Finance, Inc. |
13F
Company
|
—
denominator unverified
|
$69,571,045
9,226,929 shares
|
— | 30 Sep 2023 |
| Granahan Investment Management, LLC |
13F
Company
|
—
denominator unverified
|
$54,316,675
7,203,803 shares
|
— | 30 Sep 2023 |
| Edenbrook Capital, LLC |
13F
Company
|
—
denominator unverified
|
$44,096,921
5,848,398 shares
|
— | 30 Sep 2023 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
—
denominator unverified
|
$42,886,126
5,687,768 shares
|
— | 30 Sep 2023 |
| FMR LLC |
13F
Company
|
—
denominator unverified
|
$33,178,350
4,400,312 shares
|
— | 30 Sep 2023 |
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 Q4 2023
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
215
Shares
102,653,022
Rows available
215
| 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 Q4 2023 vs Q3 2023 Across Filers
Q3 2023 holders
208
Q4 2023 holders
215
Holder diff
7
| Investor | Q3 2023 Shares | Q4 2023 Shares | Share Diff | Share Chg % | Q3 2023 value | Q4 2023 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend