KATZ CAROLYN

PrivateCIK: 1212776

Location

BOSTON, X1

FERGUSON LEWIS H

→COGENT COMMUNICATIONS HOLDINGS, INC.

May 28, 2026·May 28, 2026

1 txn

SCHAEFFER DAVE

→COGENT COMMUNICATIONS HOLDINGS, INC.

Apr 2, 2026·Apr 2, 2026

3 txn

FERGUSON LEWIS H

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 31, 2026·Mar 31, 2026

1 txn

MONTAGNER MARC

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 31, 2026·Mar 31, 2026

1 txn

KENNEDY SHERYL LYNN

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 31, 2026·Mar 31, 2026

1 txn

DE SA PAUL

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 31, 2026·Mar 31, 2026

1 txn

HOWARD EVE N

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 31, 2026·Mar 31, 2026

1 txn

HOWELL DENEEN C

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 31, 2026·Mar 31, 2026

1 txn

KILMER HENRY W

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 9, 2026·Mar 9, 2026

1 txn

WEED THADDEUS GERARD

144

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 5, 2026·Mar 5, 2026

-2

KENNEDY SHERYL LYNN

144

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 5, 2026·Mar 5, 2026

FERGUSON LEWIS H

144

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 5, 2026·Mar 5, 2026

KILMER HENRY W

144

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 5, 2026·Mar 5, 2026

-2

WEED THADDEUS GERARD

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 5, 2026·Mar 5, 2026

1 txn

FERGUSON LEWIS H

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 5, 2026·Mar 5, 2026

1 txn

KENNEDY SHERYL LYNN

→COGENT COMMUNICATIONS HOLDINGS, INC.

Mar 5, 2026·Mar 5, 2026

1 txn

KENNEDY SHERYL LYNN

→COGENT COMMUNICATIONS HOLDINGS, INC.

Jan 5, 2026·Jan 5, 2026

1 txn

CHANG JOHN B.

→COGENT COMMUNICATIONS HOLDINGS, INC.

Jan 5, 2026·Jan 5, 2026

3 txn

KILMER HENRY W

→COGENT COMMUNICATIONS HOLDINGS, INC.

Jan 5, 2026·Jan 5, 2026

1 txn

MONTAGNER MARC

→COGENT COMMUNICATIONS HOLDINGS, INC.

Jan 5, 2026·Jan 5, 2026

1 txn

HARRIS MARK ANDREW

→COGENT COMMUNICATIONS HOLDINGS, INC.

Jan 5, 2026·Jan 5, 2026

2 txn

HOWARD EVE N

→COGENT COMMUNICATIONS HOLDINGS, INC.

Jan 5, 2026·Jan 5, 2026

1 txn

HOWELL DENEEN C

→COGENT COMMUNICATIONS HOLDINGS, INC.

Jan 5, 2026·Jan 5, 2026

1 txn

DE SA PAUL

→COGENT COMMUNICATIONS HOLDINGS, INC.

Jan 5, 2026·Jan 5, 2026

1 txn

FERGUSON LEWIS H

→COGENT COMMUNICATIONS HOLDINGS, INC.

Jan 5, 2026·Jan 5, 2026

1 txn

Page 1 of 26 · 634 total

Filer	Form	Target	Filed	Activity
FERGUSON LEWIS HCIK · 1395643	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	May 28, 2026 May 28, 2026	1txn
SCHAEFFER DAVECIK · 1166976	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Apr 2, 2026 Apr 2, 2026	3txn
FERGUSON LEWIS HCIK · 1395643	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 31, 2026 Mar 31, 2026	1txn
MONTAGNER MARCCIK · 1456823	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 31, 2026 Mar 31, 2026	1txn
KENNEDY SHERYL LYNNCIK · 1790695	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 31, 2026 Mar 31, 2026	1txn
DE SA PAULCIK · 1901420	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 31, 2026 Mar 31, 2026	1txn
HOWARD EVE NCIK · 1933694	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 31, 2026 Mar 31, 2026	1txn
HOWELL DENEEN CCIK · 1923830	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 31, 2026 Mar 31, 2026	1txn
KILMER HENRY WCIK · 1599812	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 9, 2026 Mar 9, 2026	1txn
WEED THADDEUS GERARDCIK · 1166978	144 Sale	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 5, 2026 Mar 5, 2026	—
KENNEDY SHERYL LYNNCIK · 1790695	144 Sale	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 5, 2026 Mar 5, 2026	—
FERGUSON LEWIS HCIK · 1395643	144 Sale	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 5, 2026 Mar 5, 2026	—
KILMER HENRY WCIK · 1599812	144 Sale	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 5, 2026 Mar 5, 2026	—
WEED THADDEUS GERARDCIK · 1166978	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 5, 2026 Mar 5, 2026	1txn
FERGUSON LEWIS HCIK · 1395643	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 5, 2026 Mar 5, 2026	1txn
KENNEDY SHERYL LYNNCIK · 1790695	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Mar 5, 2026 Mar 5, 2026	1txn
KENNEDY SHERYL LYNNCIK · 1790695	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Jan 5, 2026 Jan 5, 2026	1txn
CHANG JOHN B.CIK · 1775672	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Jan 5, 2026 Jan 5, 2026	3txn
KILMER HENRY WCIK · 1599812	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Jan 5, 2026 Jan 5, 2026	1txn
MONTAGNER MARCCIK · 1456823	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Jan 5, 2026 Jan 5, 2026	1txn
HARRIS MARK ANDREWCIK · 2083050	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Jan 5, 2026 Jan 5, 2026	2txn
HOWARD EVE NCIK · 1933694	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Jan 5, 2026 Jan 5, 2026	1txn
HOWELL DENEEN CCIK · 1923830	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Jan 5, 2026 Jan 5, 2026	1txn
DE SA PAULCIK · 1901420	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Jan 5, 2026 Jan 5, 2026	1txn
FERGUSON LEWIS HCIK · 1395643	4 Trade	COGENT COMMUNICATIONS HOLDINGS, INC.CIK · 1158324	Jan 5, 2026 Jan 5, 2026	1txn

Page 1 of 26 · 634 total