Citadel Advisors
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Citadel Advisors’s iShares MBS ETF MBB Stock Holding History

Citadel Advisors’s Portfolio MBB Stock Details MBB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$350K Sell
3,700
-6,400
-63% -$605K ﹤0.01% 10772
2026
Q1 		$959K Buy
+10,100
New +$965K ﹤0.01% 7747
2025
Q4 		– Sell
-77,600
Closed -$7.38M – 13507
2025
Q3 		$7.38M Buy
77,600
+1,100
+1% +$103K ﹤0.01% 3711
2025
Q2 		$7.18M Buy
76,500
+1,500
+2% +$139K ﹤0.01% 3512
2025
Q1 		$7.03M Sell
75,000
-9,000
-11% -$832K ﹤0.01% 3363
2024
Q4 		$7.7M Sell
84,000
-4,600
-5% -$428K ﹤0.01% 3313
2024
Q3 		$8.49M Sell
88,600
-57,600
-39% -$5.44M ﹤0.01% 3164
2024
Q2 		$13.4M Buy
146,200
+19,200
+15% +$1.75M ﹤0.01% 2432
2024
Q1 		$11.7M Sell
127,000
-10,100
-7% -$934K ﹤0.01% 2735
2023
Q4 		$12.9M Buy
137,100
+65,900
+93% +$5.91M ﹤0.01% 2519
2023
Q3 		$6.32M Buy
71,200
+16,800
+31% +$1.54M ﹤0.01% 3302
2023
Q2 		$5.07M Sell
54,400
-6,900
-11% -$649K ﹤0.01% 3620
2023
Q1 		$5.81M Buy
61,300
+25,300
+70% +$2.39M ﹤0.01% 3559
2022
Q4 		$3.34M Buy
36,000
+10,800
+43% +$996K ﹤0.01% 4563
2022
Q3 		$2.31M Sell
25,200
-10,600
-30% -$1.03M ﹤0.01% 5317
2022
Q2 		$3.49M Sell
35,800
-63,400
-64% -$6.22M ﹤0.01% 4481
2022
Q1 		$10.1M Buy
+99,200
New +$10.4M ﹤0.01% 2942
2021
Q3 		– Sell
-4,500
Closed -$487K – 14317
2021
Q2 		$487K Sell
4,500
-4,200
-48% -$455K ﹤0.01% 10115
2021
Q1 		$943K Sell
8,700
-3,800
-30% -$416K ﹤0.01% 8274
2020
Q4 		$1.38M Sell
12,500
-17,400
-58% -$1.92M ﹤0.01% 6112
2020
Q3 		$3.3M Buy
29,900
+21,300
+248% +$2.36M ﹤0.01% 3827
2020
Q2 		$952K Sell
8,600
-10,900
-56% -$1.21M ﹤0.01% 5921
2020
Q1 		$2.15M Buy
+19,500
New +$2.12M ﹤0.01% 4022
2019
Q4 		– Sell
-5,000
Closed -$542K – 9479
2019
Q3 		$542K Buy
+5,000
New +$540K ﹤0.01% 6598

Other funds holding MBB

Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Envestnet Asset Management
Envestnet Asset Management Chicago, Illinois $424B AUM 22.96% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $445B AUM 25.58% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
TWIM
TIAA Wealth Investment Management New York $15B AUM
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
TCIIS
TIAA-CREF Individual & Institutional Services New York $29.1B AUM
Truist Financial
Truist Financial Charlotte, North Carolina $83.7B AUM 27.22% 1-Year Est. Return

Citadel Advisors's MBB Position: Q2 2026 in Review

Citadel Advisors sold out of iShares MBS ETF (MBB) in Q2 2026, closing a stake of 127,545 shares — an estimated $12.1M sold.

Citadel Advisors first reported a position in MBB in Q1 2014 and held it in 23 quarters. The position peaked at $557M in Q1 2021. 1,026 funds tracked by Wall St. Rank hold MBB as of Q2 2026.

  • Citadel Advisors reported no remaining iShares MBS ETF position as of Q2 2026 after selling out during the quarter.
  • Citadel Advisors sold 127,545 iShares MBS ETF shares in Q2 2026, an estimated $12.1M.
  • Citadel Advisors first reported a position in iShares MBS ETF in Q1 2014 and held it in 23 quarters.
  • Citadel Advisors's iShares MBS ETF position peaked at $557M in Q1 2021.
  • 1,026 funds tracked by Wall St. Rank held iShares MBS ETF as of Q2 2026.

Based on Citadel Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.