Ambac Financial Group INC Schedule 13G passive stakes
Filed when an investor crosses five percent without intending to seek control — the passive counterpart to a 13D.
Vanguard Capital Management has reported beneficial ownership of 5.04% of Octave Specialty Group Inc.'s common stock as of June 30, 2026.
Western Standard LLC and Eric D. Andersen have reported a 4.99% beneficial ownership stake in Octave Specialty Group, Inc.
Jane Street Group and its affiliates have reported beneficial ownership of 1.7% of Octave Specialty Group Inc.'s common stock as of March 31, 2026.
The Vanguard Group has filed an amended Schedule 13G, reporting 0% beneficial ownership in Octave Specialty Group Inc following an internal realignment.
Western Standard LLC has reported a 5.87% beneficial ownership stake in Octave Specialty Group, Inc., holding 2,572,446 shares of common stock.
Jane Street Group and its affiliates have reported a 5.4% beneficial ownership stake in Octave Specialty Group Inc. common stock.
Three affiliated broker-dealers, G1 Execution Services, SIG Brokerage, and Susquehanna Securities, collectively reported a 2.2% beneficial ownership stake in Ambac Financial Group, Inc.
SCHEDULE 13G/A: BlackRock Boosts Ambac Financial Stake to 7.6%
BlackRock, Inc. has reported an increased beneficial ownership of 7.6% in Ambac Financial Group Inc., holding 3,535,664 common shares.
SCHEDULE 13G/A: Dimensional Fund Advisors Reports 4.6% Stake in Ambac
Dimensional Fund Advisors LP has reported a 4.6% beneficial ownership stake in Ambac Financial Group Inc. common stock.
SIG Brokerage, LP and Susquehanna Securities, LLC have jointly disclosed a 5.1% beneficial ownership stake in Ambac Financial Group, Inc.
SCHEDULE 13G/A: Vanguard Group Discloses 5.75% Stake in Ambac Financial Group
The Vanguard Group has filed an amended Schedule 13G, reporting a 5.75% beneficial ownership stake in Ambac Financial Group Inc. as of March 31, 2025.
SCHEDULE 13G/A: BlackRock Discloses 8.7% Stake in Ambac Financial Group
BlackRock, Inc. has filed an amended Schedule 13G, revealing a beneficial ownership of 8.7% of Ambac Financial Group Inc.'s common stock as of March 31, 2025.
SCHEDULE 13G/A: Vanguard Group Discloses 6.77% Stake in Ambac Financial Group
The Vanguard Group has filed an amended Schedule 13G, reporting a 6.77% beneficial ownership stake in Ambac Financial Group Inc. as of December 31, 2024.