MAX · MediaAlpha, Inc. · Shareholders & Ownership
$11.67
-0.24 (-1.97%)
At close · Oct 26
Return incl. dividend (before tax)
Market Cap
$729.04M
Shares
61.26M
Volume · Oct 26
149.1K
Avg daily vol (3M)
815.29K
Every disclosed holder of MAX in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns MAX
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 48,794,328 | 79.65% |
| Insiders (Forms 3, 4, 5) | 0 | 0.00% |
| 13D/G-only blocks | 9,706,577 | 15.84% |
| Remaining | 2,763,073 | 4.51% |
| Registered funds (N-PORT, not summed) | 8,517,821 | 13.90% |
Shares outstanding: 61,263,978, the issuer's latest cover-page count restated onto today's split basis.
Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of MAX
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
WHITE MOUNTAINS INSURANCE GROUP LTD
13F
CIK 776867 · Insurance company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
17,856,614 | ||
| 2 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,392,357 | ||
| 2.1 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
819,364 | ||
| 2.2 |
BlackRock Advantage Small Cap Core Fund
Fund
S000039982 · Registered fund · May 29, 2026
BlackRock Funds, not summed
|
372,399 | ||
| 2.3 |
iShares Russell 2000 Growth ETF
Fund
S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
282,211 | ||
| 2.4 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
103,609 | ||
| 2.5 |
Master Small Cap Index Series
Fund
S000002716 · Registered fund · Jun 30, 2026
Quantitative Master Series LLC, not summed
|
53,639 | ||
| 3 |
Divisadero Street Capital Management, LP
13G
CIK 1901865 · Registered investment adviser · Jul 21, 2026
Rule 13d-1(c), passive investor, not summed
|
3,128,988 | ||
| 3.1 |
Divisadero Street Capital Management, LP
13F
CIK 1901865 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,019,988 | ||
| 4 |
Clearline Capital LP
13F
CIK 1600136 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,713,890 | ||
| 5 |
Broad Bay Capital Management, LP
13G
CIK 1759115 · Registered investment adviser · Dec 31, 2023
Rule 13d-1(c), passive investor
|
2,318,964 | ||
| 6 |
|
2,313,707 | ||
| 7 |
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
13G
CIK 1021223 · Registered investment adviser · Jul 31, 2024
Rule 13d-1(b), qualified institution
|
2,189,492 | ||
| 8 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,880,062 | ||
| 9 |
|
1,604,530 | ||
| 9.1 |
Eugene Nonko
13D
CIK 1830016 · Unknown · Aug 25, 2026
Item 4 purpose: not restated by this amendment, the earlier 13D's purpose stands
|
5,198,121 | ||
| 10 |
JPMorgan Small Cap Blend Fund
Fund
S000002767 · Registered fund · Jun 30, 2026
JPMorgan Trust I, not summed
|
1,402,901 | ||
| 11 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,276,369 | ||
| 12 |
|
1,080,127 | ||
| 13 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,068,308 | ||
| 14 |
JACOBS LEVY EQUITY MANAGEMENT, INC
13F
CIK 884414 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
971,232 | ||
| 15 |
ACADIAN ASSET MANAGEMENT LLC
13F
CIK 916542 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
957,095 | ||
| 16 |
JACOBS ASSET MANAGEMENT, LLC
13F
CIK 1351063 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
919,761 | ||
| 17 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
882,700 | ||
| 18 |
|
862,235 | ||
| 18.1 |
State Street(R) SPDR(R) FactSet Innovative Technology ETF
Fund
S000051577 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
50,215 | ||
| 18.2 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
12,503 | ||
| 18.3 |
State Street(R) SPDR(R) Portfolio MSCI Global Stock Market ETF
Fund
S000036082 · Registered fund · Jun 30, 2026
SPDR INDEX SHARES FUNDS, not summed
|
803 | ||
| 18.4 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
624 | ||
| 18.5 |
State Street Balanced Index Fund
Fund
S000082802 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
104 | ||
| 19 |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
13F
CIK 1164508 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
829,958 | ||
| 20 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
821,170 | ||
| 21 |
|
752,447 | ||
| 21.1 |
Nuveen Quant Small/Mid Cap Equity Fund
Fund
S000054623 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
307,630 | ||
| 21.2 |
College Retirement Equities Fund - Total Global Stock Account
Fund
S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
|
249,500 | ||
| 21.3 |
Nuveen Small Cap Blend Index Fund
Fund
S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
39,531 | ||
| 21.4 |
Nuveen Equity Index Fund
Fund
S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
13,002 | ||
| 21.5 |
TIAA Separate Account VA-1 - Stock Index Account
Fund
S000005098 · Registered fund · Jun 30, 2026
TIAA Separate Account VA-1, not summed
|
494 | ||
| 22 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
701,914 | ||
| 22.1 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
174,804 | ||
| 22.2 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
165,545 | ||
| 22.3 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
138,256 | ||
| 22.4 |
U.S. CORE EQUITY 2 PORTFOLIO
Fund
S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
30,340 | ||
| 22.5 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
24,208 | ||
| 23 |
J. Goldman & Co LP
13F
CIK 1412741 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
598,070 | ||
| 24 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
589,696 | ||
| 25 |
COYNE JEFFREY B
Insider
CIK 1213184 · Aug 15, 2026
EVP, General Counsel & Sec, issuer-wide, not summed
|
577,582 | ||
| 26 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
574,407 | ||
| 27 |
Shay Capital LLC
13F
CIK 1723643 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
570,000 | ||
| 28 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
551,625 | ||
| 29 |
Yeh Kuanling Amy
Insider
CIK 1829969 · Oct 16, 2026
Chief Technology Officer, issuer-wide, not summed
|
543,091 | ||
| 30 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
535,926 | ||
| 31 |
SPEECE THORSON CAPITAL GROUP INC
13F
CIK 900169 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
489,098 | ||
| 32 |
EVR Research LP
13F
CIK 1843019 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
440,000 | ||
| 33 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
433,046 | ||
| 34 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
428,866 | ||
| 34.1 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
42,181 | ||
| 34.2 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Aug 31, 2026
GOLDMAN SACHS TRUST, not summed
|
9,074 | ||
| 35 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
409,480 | ||
| 36 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
391,641 | ||
| 36.1 |
AQR Small Cap Multi-Style Fund
Fund
S000040064 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
18,655 | ||
| 37 |
HRT FINANCIAL LP
13F
CIK 1475597 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
372,929 | ||
| 38 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
371,840 | ||
| 39 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
363,196 | ||
| 40 |
Triad Investment Management
13F
CIK 1615717 · Registered investment adviser · Sep 30, 2026
|
324,382 | ||
| 41 |
Stoic Point Capital Management LLC
13F
CIK 2043279 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
297,150 | ||
| 42 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
267,107 | ||
| 42.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
14,496 | ||
| 43 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
259,224 | ||
| 43.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
156,660 | ||
| 43.2 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
74,911 | ||
| 43.3 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
19,325 | ||
| 43.4 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
18,518 | ||
| 44 |
|
254,781 | ||
| 45 |
|
239,303 | ||
| 46 |
Squarepoint Ops LLC
13F
CIK 1642575 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
234,255 | ||
| 47 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
223,917 | ||
| 48 |
TEACHER RETIREMENT SYSTEM OF TEXAS
13F
CIK 796848 · Pension or benefit plan · Jun 30, 2026
carried, not yet filed for the newest quarter
|
216,405 | ||
| 49 |
ALLIANCEBERNSTEIN L.P.
13F
CIK 1109448 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
211,450 | ||
| 49.1 |
Small Cap Core Portfolio
Fund
S000051867 · Registered fund · Jun 30, 2026
Bernstein Fund Inc, not summed
|
168,720 | ||
| 50 |
BNP PARIBAS ARBITRAGE, SA
13F
CIK 1166588 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
209,204 |
15 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
Showing 1–50 of 246 holders
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Key facts
CIK
1818383
CUSIP
58450V104
13F (30d)
19 filings
19 filers
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