What does CUSIP G9618E107 represent in this 13F holders report?

CUSIP G9618E107 is the security identifier for WTM - WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock used to aggregate holder disclosures.

How many institutions held WTM - WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock in Q4 2018?

242 institutional investors reported WTM - WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock for Q4 2018. Use the holders table for investor-level position and value details.

WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM)

CUSIP: G9618E107

Q4 2018 13F Holders as of 31 Dec 2018

Type / Class: Equity / Common Stock
Shares outstanding: 2,470,907
Total 13F shares: 2,767,043
Share change: -9,066
Total reported value: $2,373,366,225
Price per share: $857.69
Number of holders: 242
Value change: -$10,445,538
Number of buys: 94
Number of sells: 104

Quarterly Holders Quick Answers

What is CUSIP G9618E107?
CUSIP G9618E107 identifies WTM - WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock in SEC institutional holdings data.

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Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q1 2019
Previous quarter: Q3 2018

Recent filing periods for CUSIP G9618E107:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of WTM - WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
VANGUARD GROUP INC	13F	Company	11%	279,266	$261,356,000	—	30 Sep 2018	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	9.1%	225,220	$210,776,000	—	30 Sep 2018	13F
Boston Partners	13F	Company	6.6%	162,651	$152,220,000	—	30 Sep 2018	13F
BlackRock Finance, Inc.	13F	Company	5.6%	138,114	$129,256,000	—	30 Sep 2018	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	4.9%	120,261	$112,547,000	—	30 Sep 2018	13F
FIDUCIARY MANAGEMENT INC /WI/	13F	Company	4.5%	110,915	$103,802,000	—	30 Sep 2018	13F
VICTORY CAPITAL MANAGEMENT INC	13F	Company	4.2%	103,807	$97,150,000	—	30 Sep 2018	13F
FULLER & THALER ASSET MANAGEMENT, INC.	13F	Company	3.9%	97,417	$91,170,000	—	30 Sep 2018	13F
GOLDMAN SACHS GROUP INC	13F	Company	3.7%	90,572	$84,763,000	—	30 Sep 2018	13F
LONDON CO OF VIRGINIA	13F	Company	3.5%	85,807	$80,304,000	—	30 Sep 2018	13F
Wallace Capital Management Inc.	13F	Company	3.3%	82,453	$77,165,000	—	30 Sep 2018	13F
ATLANTA CAPITAL MANAGEMENT CO L L C	13F	Company	3.1%	77,812	$72,822,000	—	30 Sep 2018	13F
River Road Asset Management, LLC	13F	Company	3.1%	76,645	$71,730,000	—	30 Sep 2018	13F
NORTHERN TRUST CORP	13F	Company	2.3%	56,665	$53,031,000	—	30 Sep 2018	13F
STATE STREET CORP	13F	Company	2.2%	55,040	$51,512,000	—	30 Sep 2018	13F
REINHART PARTNERS, LLC.	13F	Company	1.7%	41,835	$39,152,000	—	30 Sep 2018	13F
Cannell & Co.	13F	Company	1.5%	37,198	$34,812,000	—	30 Sep 2018	13F
NUANCE INVESTMENTS, LLC	13F	Company	1.5%	36,539	$34,163,000	—	30 Sep 2018	13F
Burgundy Asset Management Ltd.	13F	Company	1.5%	35,889	$33,587,000	—	30 Sep 2018	13F
Capital World Investors	13F	Company	1.3%	33,000	$30,884,000	—	30 Sep 2018	13F
WELLS FARGO & COMPANY/MN	13F	Company	1.3%	32,297	$30,225,000	—	30 Sep 2018	13F
NORGES BANK	13F	Company	1.2%	29,114	$27,247,000	—	30 Sep 2018	13F
THIRD AVENUE MANAGEMENT LLC	13F	Company	1.2%	28,649	$26,812,000	—	30 Sep 2018	13F
Mraz, Amerine & Associates, Inc.	13F	Company	1.1%	28,271	$26,458,000	—	30 Sep 2018	13F
FEDERATED HERMES, INC.	13F	Company	1.1%	28,199	$26,391,000	—	30 Sep 2018	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.1%	27,994	$26,198,000	—	30 Sep 2018	13F
ELKHORN PARTNERS LIMITED PARTNERSHIP	13F	Company	1.1%	26,000	$24,333,000	—	30 Sep 2018	13F
THOMPSON SIEGEL & WALMSLEY LLC	13F	Company	1%	25,772	$24,119,000	—	30 Sep 2018	13F
FENIMORE ASSET MANAGEMENT INC	13F	Company	0.97%	24,028	$22,487,000	—	30 Sep 2018	13F
SCOUT INVESTMENTS, INC.	13F	Company	0.97%	23,960	$22,423,000	—	30 Sep 2018	13F
PARAMETRIC PORTFOLIO ASSOCIATES LLC	13F	Company	0.93%	22,978	$21,504,000	—	30 Sep 2018	13F
Impax Asset Management Group plc	13F	Company	0.93%	22,929	$21,459,000	—	30 Sep 2018	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.88%	21,816	$20,416,000	—	30 Sep 2018	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.87%	21,387	$20,015,000	—	30 Sep 2018	13F
Capital International Investors	13F	Company	0.76%	18,800	$17,594,000	—	30 Sep 2018	13F
Aperio Group, LLC	13F	Company	0.69%	16,977	$15,888,000	—	30 Sep 2018	13F
CARILLON TOWER ADVISERS, INC.	13F	Company	0.66%	16,275	$15,231,000	—	30 Sep 2018	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.64%	15,724	$14,716,000	—	30 Sep 2018	13F
Robeco Institutional Asset Management B.V.	13F	Company	0.63%	15,556	$14,556,000	—	30 Sep 2018	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.59%	14,681	$13,740,000	—	30 Sep 2018	13F
SPEECE THORSON CAPITAL GROUP INC	13F	Company	0.58%	14,453	$13,526,000	—	30 Sep 2018	13F
Brandywine Global Investment Management, LLC	13F	Company	0.58%	14,236	$13,324,000	—	30 Sep 2018	13F
EAGLE ASSET MANAGEMENT INC	13F	Company	0.54%	13,332	$12,477,000	—	30 Sep 2018	13F
Bank of New York Mellon Corp	13F	Company	0.5%	12,300	$11,511,000	—	30 Sep 2018	13F
Man Group plc	13F	Company	0.47%	11,633	$10,887,000	—	30 Sep 2018	13F
HighTower Advisors, LLC	13F	Company	0.45%	11,050	$10,345,000	—	30 Sep 2018	13F
JPMORGAN CHASE & CO	13F	Company	0.37%	9,263	$8,669,000	—	30 Sep 2018	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.37%	9,077	$8,495,000	—	30 Sep 2018	13F
Port Capital LLC	13F	Company	0.37%	9,050	$8,470,000	—	30 Sep 2018	13F
TEACHERS ADVISORS, LLC	13F	Company	0.35%	8,757	$8,195,000	—	30 Sep 2018	13F

Institutional Holders of WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM) as of Q4 2018

As of 31 Dec 2018, WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM) was held by 242 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 2,767,043 shares. The largest 10 holders included Vanguard Group Inc, WELLINGTON MANAGEMENT GROUP LLP, Boston Partners, BlackRock Inc., DIMENSIONAL FUND ADVISORS LP, FIDUCIARY MANAGEMENT INC /WI/, VICTORY CAPITAL MANAGEMENT INC, ATLANTA CAPITAL MANAGEMENT CO L L C, Wallace Capital Management Inc., and GOLDMAN SACHS GROUP INC. This page lists 242 institutional shareholders reporting positions in this security for the Q4 2018 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q4 2018 vs Q3 2018 Across Filers

Q3 2018 holders

238

Q4 2018 holders

242

Holder diff

Investor	Q3 2018 Shares	Q4 2018 Shares	Share Diff	Share Chg %	Q3 2018 Value $	Q4 2018 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.