DILLON MARGARET

PrivateCIK: 1787371

Location

SAN MATEO, CA

PETERSON DAVID FRANKLIN

→GUIDEWIRE SOFTWARE, INC.

Sep 21, 2026·Sep 21, 2026

1 txn

PETERSON DAVID FRANKLIN

144

→GUIDEWIRE SOFTWARE, INC.

Sep 17, 2026·Sep 17, 2026

PETERSON DAVID FRANKLIN

→GUIDEWIRE SOFTWARE, INC.

Sep 15, 2026·Sep 15, 2026

2 txn

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Sep 14, 2026·Sep 14, 2026

-15

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Aug 31, 2026·Aug 31, 2026

-15

PETERSON DAVID FRANKLIN

→GUIDEWIRE SOFTWARE, INC.

Aug 27, 2026·Aug 27, 2026

1 txn

PETERSON DAVID FRANKLIN

144

→GUIDEWIRE SOFTWARE, INC.

Aug 27, 2026·Aug 27, 2026

-2

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Aug 24, 2026·Aug 24, 2026

-15

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Aug 17, 2026·Aug 17, 2026

-15

WHITE MOUNTAINS INSURANCE GROUP LTD

13F-HR

Holdings

Aug 12, 2026·Aug 12, 2026

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Aug 10, 2026·Aug 10, 2026

-15

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Aug 3, 2026·Aug 3, 2026

-15

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Jul 6, 2026·Jul 6, 2026

-14

PETERSON DAVID FRANKLIN

→GUIDEWIRE SOFTWARE, INC.

Jun 17, 2026·Jun 17, 2026

1 txn

PETERSON DAVID FRANKLIN

144

→GUIDEWIRE SOFTWARE, INC.

Jun 16, 2026·Jun 16, 2026

-2

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Jun 8, 2026·Jun 8, 2026

-15

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

May 26, 2026·May 26, 2026

-14

DILLON MARGARET

→WHITE MOUNTAINS INSURANCE GROUP LTD

May 22, 2026·May 22, 2026

1 txn

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

May 18, 2026·May 18, 2026

-14

WHITE MOUNTAINS INSURANCE GROUP LTD

13F-HR

Holdings

May 12, 2026·May 12, 2026

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Apr 20, 2026·Apr 20, 2026

-14

ROSENBAUM MICHAEL GEORGE

→GUIDEWIRE SOFTWARE, INC.

Mar 31, 2026·Mar 31, 2026

1 txn

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Mar 30, 2026·Mar 30, 2026

-13

ROSENBAUM MICHAEL GEORGE

→GUIDEWIRE SOFTWARE, INC.

Mar 24, 2026·Mar 24, 2026

1 txn

ROSENBAUM MICHAEL GEORGE

144

→GUIDEWIRE SOFTWARE, INC.

Mar 23, 2026·Mar 23, 2026

-13

Page 1 of 28 · 687 total

Filer	Form	Target	Filed	Activity
PETERSON DAVID FRANKLINCIK · 1496152	4 Trade	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Sep 21, 2026 Sep 21, 2026	1txn
PETERSON DAVID FRANKLINCIK · 1496152	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Sep 17, 2026 Sep 17, 2026	—
PETERSON DAVID FRANKLINCIK · 1496152	4 Trade	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Sep 15, 2026 Sep 15, 2026	2txn
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Sep 14, 2026 Sep 14, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Aug 31, 2026 Aug 31, 2026	—
PETERSON DAVID FRANKLINCIK · 1496152	4 Trade	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Aug 27, 2026 Aug 27, 2026	1txn
PETERSON DAVID FRANKLINCIK · 1496152	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Aug 27, 2026 Aug 27, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Aug 24, 2026 Aug 24, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Aug 17, 2026 Aug 17, 2026	—
WHITE MOUNTAINS INSURANCE GROUP LTDCIK · 776867	13F-HR Holdings	—	Aug 12, 2026 Aug 12, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Aug 10, 2026 Aug 10, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Aug 3, 2026 Aug 3, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Jul 6, 2026 Jul 6, 2026	—
PETERSON DAVID FRANKLINCIK · 1496152	4 Trade	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Jun 17, 2026 Jun 17, 2026	1txn
PETERSON DAVID FRANKLINCIK · 1496152	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Jun 16, 2026 Jun 16, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Jun 8, 2026 Jun 8, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	May 26, 2026 May 26, 2026	—
DILLON MARGARETCIK · 1787371	4 Trade	WHITE MOUNTAINS INSURANCE GROUP LTDCIK · 776867	May 22, 2026 May 22, 2026	1txn
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	May 18, 2026 May 18, 2026	—
WHITE MOUNTAINS INSURANCE GROUP LTDCIK · 776867	13F-HR Holdings	—	May 12, 2026 May 12, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Apr 20, 2026 Apr 20, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	4 Trade	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Mar 31, 2026 Mar 31, 2026	1txn
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Mar 30, 2026 Mar 30, 2026	—
ROSENBAUM MICHAEL GEORGECIK · 1784996	4 Trade	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Mar 24, 2026 Mar 24, 2026	1txn
ROSENBAUM MICHAEL GEORGECIK · 1784996	144 Sale	GUIDEWIRE SOFTWARE, INC.CIK · 1528396	Mar 23, 2026 Mar 23, 2026	—

Page 1 of 28 · 687 total