Security key
55955D100
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 76,786,392
- Total 13F value
- $2,357,551,419
- Share change
- -6,830,136
- Put/Call ratio
- 72%
- SEC-reported price per share
- $30.71
- Number of holders
- 235
- Value change
- +$83,965,902
- Number of buys
- 142
- Number of sells
- 96
- Shares outstanding
- 143,436,829
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 2020
Institutions
235
Top holders
10
MGNI full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2021
Previous quarter: Q3 2020
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
Granahan Investment Manag...
Disclosed value leader
Granahan Investment Manag...
Comparable rows
15/15
Latest evidence
30 Sep 2020
13F
Lead comparable stake: 7%
Showing 1-6 of 15 holder rows.
Quick read
Granahan Investment Management, LLC leads the comparable SEC ownership view at 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 Granahan Investment Management, LLC's linked filing trail.
Comparable ownership
Top 5
Granahan Investment Management, LLC
7%
BlackRock Finance, Inc.
5.2%
VANGUARD GROUP INC
3.6%
Nine Ten Capital Management LLC
3.5%
Edenbrook Capital, LLC
3.2%
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 |
|---|---|---|---|---|---|
| Granahan Investment Management, LLC |
13F
Company
|
7%
|
$69,610,000
10,023,076 shares
|
— | 30 Sep 2020 |
| BlackRock Finance, Inc. |
13F
Company
|
5.2%
|
$51,775,000
7,454,864 shares
|
— | 30 Sep 2020 |
| VANGUARD GROUP INC |
13F
Company
|
3.6%
|
$35,390,000
5,095,825 shares
|
— | 30 Sep 2020 |
| Nine Ten Capital Management LLC |
13F
Company
|
3.5%
|
$34,481,000
4,964,934 shares
|
— | 30 Sep 2020 |
| Edenbrook Capital, LLC |
13F
Company
|
3.2%
|
$31,945,000
4,599,708 shares
|
— | 30 Sep 2020 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
3%
|
$30,045,000
4,326,109 shares
|
— | 30 Sep 2020 |
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 2020
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
235
Shares
76,786,392
Rows available
235
| 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 2020 vs Q3 2020 Across Filers
Q3 2020 holders
168
Q4 2020 holders
235
Holder diff
67
| Investor | Q3 2020 Shares | Q4 2020 Shares | Share Diff | Share Chg % | Q3 2020 value | Q4 2020 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend