Security key
58450V104
MediaAlpha, Inc. - Class A Common Stock, par value $0.01 per share (MAX)
CUSIP: 58450V104
Q1 2021 13F Holders as of 31 Mar 2021
- Security type / class
- Equity / Class A Common Stock, par value $0.01 per share
- Total 13F shares
- 36,467,183
- Total 13F value
- $1,291,891,052
- Share change
- +4,117,223
- SEC-reported price per share
- $35.43
- Number of holders
- 96
- Value change
- +$143,997,399
- Number of buys
- 80
- Number of sells
- 20
- Shares outstanding
- 54,061,804
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2021
Institutions
96
Top holders
10
MAX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2021
Previous quarter: Q4 2020
MediaAlpha, Inc. SEC filings
MediaAlpha, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 58450V104
Recent filing periods:
Ownership snapshot
Top reported holders of MAX - MediaAlpha, Inc. - Class A Common Stock, par value $0.01 per share (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
WHITE MOUNTAINS INSURANCE...
Disclosed value leader
WHITE MOUNTAINS INSURANCE...
Comparable rows
15/15
Latest evidence
31 Dec 2020
13F
Lead comparable stake: 38%
Showing 1-6 of 15 holder rows.
Quick read
WHITE MOUNTAINS INSURANCE GROUP LTD leads the comparable SEC ownership view at 38%.
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 WHITE MOUNTAINS INSURANCE GROUP LTD's linked filing trail.
Comparable ownership
Top 5
WHITE MOUNTAINS INSURANCE GROUP LTD
38%
KAYNE ANDERSON RUDNICK INVESTMENT...
8.3%
JPMORGAN CHASE & CO
2.4%
BlackRock Finance, Inc.
1.6%
VANGUARD GROUP INC
1.5%
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 |
|---|---|---|---|---|---|
| WHITE MOUNTAINS INSURANCE GROUP LTD |
13F
Company
|
38%
|
$802,193,000
20,532,202 shares
|
— | 31 Dec 2020 |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC |
13F
Company
|
8.3%
|
$174,975,000
4,478,491 shares
|
— | 31 Dec 2020 |
| JPMORGAN CHASE & CO |
13F
Company
|
2.4%
|
$50,307,000
1,287,594 shares
|
— | 31 Dec 2020 |
| BlackRock Finance, Inc. |
13F
Company
|
1.6%
|
$34,781,000
890,200 shares
|
— | 31 Dec 2020 |
| VANGUARD GROUP INC |
13F
Company
|
1.5%
|
$30,902,000
790,925 shares
|
— | 31 Dec 2020 |
| WASATCH ADVISORS LP |
13F
Company
|
1.2%
|
$26,330,000
673,925 shares
|
— | 31 Dec 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 Q1 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
96
Shares
36,467,183
Rows available
96
| 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 2021 vs Q4 2020 Across Filers
Q4 2020 holders
65
Q1 2021 holders
96
Holder diff
31
| Investor | Q4 2020 Shares | Q1 2021 Shares | Share Diff | Share Chg % | Q4 2020 value | Q1 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend