Harbor Advisors’s Octave Specialty Group OSG Stock Holding History

Harbor Advisors’s Portfolio OSG Stock Details OSG Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$1.23M	Hold	196,382	–	–	0.15%	75
2026 Q1	$913K	Hold	196,382	–	–	0.13%	84
2025 Q4	$1.53M	Hold	196,382	–	–	0.23%	59
2025 Q3	$1.64M	Hold	196,382	–	–	0.25%	56
2025 Q2	$1.39M	Hold	196,382	–	–	0.23%	60
2025 Q1	$1.72M	Hold	196,382	–	–	0.3%	50
2024 Q4	$2.48M	Hold	196,382	–	–	0.39%	33
2024 Q3	$2.2M	Hold	196,382	–	–	0.37%	34
2024 Q2	$2.52M	Hold	196,382	–	–	0.46%	31
2024 Q1	$3.07M	Hold	196,382	–	–	0.56%	28
2023 Q4	$3.24M	Hold	196,382	–	–	0.62%	22
2023 Q3	$2.37M	Hold	196,382	–	–	0.51%	29
2023 Q2	$2.8M	Hold	196,382	–	–	0.59%	26
2023 Q1	$3.04M	Sell	196,382 -55,000	-22%	-$890K	0.71%	18
2022 Q4	$4.38M	Hold	251,382	–	–	1.09%	12
2022 Q3	$3.21M	Hold	251,382	–	–	0.86%	15
2022 Q2	$2.85M	Hold	251,382	–	–	0.69%	19
2022 Q1	$2.61M	Sell	251,382 -10,000	-4%	-$136K	0.54%	28
2021 Q4	$4.2M	Hold	261,382	–	–	0.78%	16
2021 Q3	$3.74M	Hold	261,382	–	–	0.75%	15
2021 Q2	$4.09M	Hold	261,382	–	–	0.81%	16
2021 Q1	$4.38M	Hold	261,382	–	–	0.97%	14
2020 Q4	$4.02M	Hold	261,382	–	–	0.9%	12
2020 Q3	$3.34M	Hold	261,382	–	–	0.78%	13
2020 Q2	$3.74M	Hold	261,382	–	–	0.96%	12
2020 Q1	$3.23M	Hold	261,382	–	–	0.98%	12
2019 Q4	$5.64M	Hold	261,382	–	–	1.53%	11
2019 Q3	$5.11M	Hold	261,382	–	–	1.46%	11
2019 Q2	$4.4M	Hold	261,382	–	–	1.32%	11
2019 Q1	$4.74M	Hold	261,382	–	–	1.53%	11
2018 Q4	$4.51M	Buy	261,382 +18,265	+8%	+$335K	1.75%	11
2018 Q3	$4.96M	Hold	243,117	–	–	1.54%	11
2018 Q2	$4.83M	Hold	243,117	–	–	1.55%	11
2018 Q1	$3.81M	Hold	243,117	–	–	1.28%	11
2017 Q4	$3.88M	Hold	243,117	–	–	1.32%	8
2017 Q3	$4.2M	Buy	243,117 +10,000	+4%	+$185K	1.54%	8
2017 Q2	$4.04M	Buy	233,117 +2,500	+1%	+$44.4K	1.6%	8
2017 Q1	$4.35M	Buy	230,617 +5,000	+2%	+$105K	1.85%	8
2016 Q4	$5.08M	Buy	+225,617	New	+$4.93M	2.43%	5

Other funds holding OSG

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

WSL

Western Standard LLC Los Angeles, California $295M AUM 40.98% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

PGCM

Prescott Group Capital Management Tulsa, Oklahoma $1.16B AUM 53.61% 1-Year Est. Return

TAM

Third Avenue Management New York $625M AUM 48.93% 1-Year Est. Return

BCC

Bain Capital Credit Boston, Massachusetts $368M AUM 9.33% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Jacobs Levy Equity Management Florham Park, New Jersey $27.8B AUM 46.46% 1-Year Est. Return

Harbor Advisors's OSG Position: Q2 2026 in Review

Harbor Advisors held its Octave Specialty Group (OSG) position steady in Q2 2026 at 196,382 shares worth $1.23M. The position accounts for 0.15% of the portfolio, ranked #75.

Harbor Advisors first reported a position in OSG in Q4 2016 and has held it in 39 quarters since. The position peaked at $5.64M in Q4 2019. 148 funds tracked by Wall St. Rank hold OSG as of Q2 2026.

Harbor Advisors held 196,382 shares of Octave Specialty Group worth $1.23M as of Q2 2026.
Harbor Advisors left its Octave Specialty Group share count unchanged in Q2 2026.
Octave Specialty Group made up 0.15% of Harbor Advisors's portfolio in Q2 2026, its #75 holding.
Harbor Advisors first reported a position in Octave Specialty Group in Q4 2016 and has held it in 39 quarters since.
Harbor Advisors's Octave Specialty Group position peaked at $5.64M in Q4 2019.
148 funds tracked by Wall St. Rank held Octave Specialty Group as of Q2 2026.

Based on Harbor Advisors's 13F filing for Q2 2026, filed 28 Jul 2026.