Citadel Advisors
OSG

Citadel Advisors’s Octave Specialty Group OSG Stock Holding History

Citadel 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
Q1 		$352K Sell
75,600
-1,252,400
-94% -$7.17M ﹤0.01% 10115
2025
Q4 		$10.3M Buy
1,328,000
+297,100
+29% +$2.54M ﹤0.01% 3215
2025
Q3 		$8.6M Buy
1,030,900
+873,200
+554% +$7.38M ﹤0.01% 3489
2025
Q2 		$1.12M Sell
157,700
-137,100
-47% -$1.02M ﹤0.01% 6845
2025
Q1 		$2.58M Buy
294,800
+68,500
+30% +$721K ﹤0.01% 5044
2024
Q4 		$2.86M Sell
226,300
-37,300
-14% -$450K ﹤0.01% 4919
2024
Q3 		$2.95M Buy
263,600
+143,300
+119% +$1.68M ﹤0.01% 4811
2024
Q2 		$1.54M Sell
120,300
-27,600
-19% -$421K ﹤0.01% 5795
2024
Q1 		$2.31M Sell
147,900
-19,900
-12% -$314K ﹤0.01% 5240
2023
Q4 		$2.77M Buy
167,800
+101,200
+152% +$1.41M ﹤0.01% 4791
2023
Q3 		$803K Buy
66,600
+23,400
+54% +$314K ﹤0.01% 7029
2023
Q2 		$615K Sell
43,200
-131,500
-75% -$1.92M ﹤0.01% 7478
2023
Q1 		$2.7M Buy
174,700
+69,700
+66% +$1.13M ﹤0.01% 4810
2022
Q4 		$1.83M Sell
105,000
-309,800
-75% -$4.6M ﹤0.01% 5642
2022
Q3 		$5.29M Buy
414,800
+325,500
+365% +$4.34M ﹤0.01% 3765
2022
Q2 		$1.01M Sell
89,300
-188,200
-68% -$1.79M ﹤0.01% 6987
2022
Q1 		$2.89M Buy
277,500
+168,400
+154% +$2.28M ﹤0.01% 5283
2021
Q4 		$1.75M Buy
109,100
+48,300
+79% +$759K ﹤0.01% 6555
2021
Q3 		$871K Buy
60,800
+3,200
+6% +$45.7K ﹤0.01% 8493
2021
Q2 		$902K Buy
57,600
+8,100
+16% +$130K ﹤0.01% 8623
2021
Q1 		$829K Sell
49,500
-3,600
-7% -$58.8K ﹤0.01% 8563
2020
Q4 		$817K Buy
53,100
+4,100
+8% +$60.4K ﹤0.01% 7216
2020
Q3 		$626K Sell
49,000
-97,900
-67% -$1.26M ﹤0.01% 6877
2020
Q2 		$2.1M Sell
146,900
-76,700
-34% -$1.12M ﹤0.01% 4481
2020
Q1 		$2.76M Buy
223,600
+168,300
+304% +$3.23M ﹤0.01% 3603
2019
Q4 		$1.19M Sell
55,300
-17,600
-24% -$361K ﹤0.01% 5279
2019
Q3 		$1.43M Sell
72,900
-1,276,800
-95% -$23.4M ﹤0.01% 5012
2019
Q2 		$22.7M Buy
1,349,700
+901,500
+201% +$15.4M 0.01% 1309
2019
Q1 		$8.12M Buy
448,200
+369,900
+472% +$7.07M ﹤0.01% 2321
2018
Q4 		$1.35M Buy
78,300
+8,200
+12% +$151K ﹤0.01% 4804
2018
Q3 		$1.43M Buy
70,100
+22,400
+47% +$468K ﹤0.01% 4937
2018
Q2 		$947K Buy
47,700
+18,200
+62% +$336K ﹤0.01% 5316
2018
Q1 		$463K Buy
+29,500
New +$456K ﹤0.01% 6005
2017
Q4 		– Sell
-11,200
Closed -$193K – 7920
2017
Q3 		$193K Buy
11,200
+100
+0.9% +$1.85K ﹤0.01% 6725
2017
Q2 		$193K Sell
11,100
-40,100
-78% -$712K ﹤0.01% 6598
2017
Q1 		$966K Buy
51,200
+26,200
+105% +$551K ﹤0.01% 4048
2016
Q4 		$563K Buy
25,000
+12,400
+98% +$271K ﹤0.01% 4715
2016
Q3 		$232K Buy
+12,600
New +$226K ﹤0.01% 6094

Other funds holding OSG

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
WSL
Western Standard LLC Los Angeles, California $190M AUM 40.88% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
PGCM
Prescott Group Capital Management Tulsa, Oklahoma $1B AUM 51.95% 1-Year Est. Return
WHCM
Wolf Hill Capital Management Greenwich, Connecticut $1.03B AUM 80.44% 1-Year Est. Return
GJL
Gendell Jeffrey L $7.34B AUM 183.72% 1-Year Est. Return
TAM
Third Avenue Management New York $616M AUM 45.6% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
BCC
Bain Capital Credit Boston, Massachusetts $303M AUM 15.47% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

Citadel Advisors's OSG Position: Q1 2026 in Review

Citadel Advisors increased its Octave Specialty Group (OSG) stake by 50% in Q1 2026, buying an estimated $827K and bringing the position to 431,809 shares worth $2.01M. The position accounts for ﹤0.01% of the portfolio, ranked #6057.

Citadel Advisors first reported a position in OSG in Q2 2013 and has held it in 48 quarters since. The position peaked at $9.65M in Q1 2025. 148 funds tracked by Wall St. Rank hold OSG as of Q1 2026.

  • Citadel Advisors held 431,809 shares of Octave Specialty Group worth $2.01M as of Q1 2026.
  • Citadel Advisors bought 144,526 Octave Specialty Group shares in Q1 2026, an estimated $827K.
  • Octave Specialty Group made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #6057 holding.
  • Citadel Advisors first reported a position in Octave Specialty Group in Q2 2013 and has held it in 48 quarters since.
  • Citadel Advisors's Octave Specialty Group position peaked at $9.65M in Q1 2025.
  • 148 funds tracked by Wall St. Rank held Octave Specialty Group as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.