Citadel Advisors’s iShares MBS ETF MBB Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $12.1M | Buy |
+127,545
| New | +$12.2M | ﹤0.01% | 2992 |
|
|
2025
Q1 | – | Sell |
-266,353
| Closed | -$24.6M | – | 15141 |
|
|
2024
Q4 | $24.4M | Buy |
266,353
+161,404
| +154% | +$15M | ﹤0.01% | 1948 |
|
|
2024
Q3 | $10.1M | Buy |
+104,949
| New | +$9.92M | ﹤0.01% | 2882 |
|
|
2024
Q1 | – | Sell |
-13,766
| Closed | -$1.27M | – | 15123 |
|
|
2023
Q4 | $1.3M | Sell |
13,766
-244,284
| -95% | -$21.9M | ﹤0.01% | 6163 |
|
|
2023
Q3 | $22.9M | Buy |
258,050
+89,421
| +53% | +$8.17M | ﹤0.01% | 1719 |
|
|
2023
Q2 | $15.7M | Buy |
168,629
+162,191
| +2,519% | +$15.3M | ﹤0.01% | 2130 |
|
|
2023
Q1 | $610K | Buy |
6,438
+4,467
| +227% | +$422K | ﹤0.01% | 7902 |
|
|
2022
Q4 | $183K | Sell |
1,971
-27,494
| -93% | -$2.54M | ﹤0.01% | 10287 |
|
|
2022
Q3 | $2.7M | Buy |
+29,465
| New | +$2.86M | ﹤0.01% | 5017 |
|
|
2022
Q2 | – | Sell |
-19,653
| Closed | -$1.93M | – | 13609 |
|
|
2022
Q1 | $2M | Sell |
19,653
-822,651
| -98% | -$85.9M | ﹤0.01% | 6080 |
|
|
2021
Q4 | $90.5M | Buy |
+842,304
| New | +$90.7M | 0.02% | 732 |
|
|
2021
Q3 | – | Sell |
-882,872
| Closed | -$95.8M | – | 14318 |
|
|
2021
Q2 | $95.6M | Sell |
882,872
-4,251,299
| -83% | -$461M | 0.02% | 698 |
|
|
2021
Q1 | $557M | Buy |
5,134,171
+4,492,215
| +700% | +$492M | 0.14% | 77 |
|
|
2020
Q4 | $70.7M | Buy |
+641,956
| New | +$70.7M | 0.02% | 738 |
|
|
2020
Q3 | – | Sell |
-9,016
| Closed | -$997K | – | 10464 |
|
|
2020
Q2 | $998K | Sell |
9,016
-162,673
| -95% | -$18M | ﹤0.01% | 5829 |
|
|
2020
Q1 | $19M | Buy |
171,689
+163,510
| +1,999% | +$17.8M | 0.01% | 1274 |
|
|
2019
Q4 | $884K | Buy |
+8,179
| New | +$884K | ﹤0.01% | 5827 |
|
|
2019
Q1 | – | Sell |
-13,612
| Closed | -$1.42M | – | 9630 |
|
|
2018
Q4 | $1.42M | Sell |
13,612
-2,684
| -16% | -$276K | ﹤0.01% | 4718 |
|
|
2018
Q3 | $1.68M | Buy |
+16,296
| New | +$1.69M | ﹤0.01% | 4681 |
|
|
2018
Q2 | – | Sell |
-4,044
| Closed | -$423K | – | 9099 |
|
|
2018
Q1 | $423K | Buy |
+4,044
| New | +$424K | ﹤0.01% | 6185 |
|
|
2017
Q2 | – | Sell |
-3,143
| Closed | -$335K | – | 7828 |
|
|
2017
Q1 | $335K | Sell |
3,143
-8,343
| -73% | -$887K | ﹤0.01% | 5720 |
|
|
2016
Q4 | $1.22M | Buy |
+11,486
| New | +$1.24M | ﹤0.01% | 3588 |
|
|
2014
Q2 | – | Sell |
-11,372
| Closed | -$1.21M | – | 8151 |
|
|
2014
Q1 | $1.21M | Buy |
+11,372
| New | +$1.21M | ﹤0.01% | 3203 |
|
Other funds holding MBB
TWIM
TCIIS
Citadel Advisors's MBB Position: Q1 2026 in Review
Citadel Advisors opened a new position in iShares MBS ETF (MBB) in Q1 2026: 127,545 shares worth $12.1M. The stake represents ﹤0.01% of the portfolio and ranks #2992 among its holdings. This is a return to the name: Citadel Advisors previously reported a position in MBB as recently as Q4 2024.
Citadel Advisors first reported a position in MBB in Q1 2014 and has held it in 23 quarters since. The position peaked at $557M in Q1 2021. 1,019 funds tracked by Wall St. Rank hold MBB as of Q1 2026.
- Citadel Advisors held 127,545 shares of iShares MBS ETF worth $12.1M as of Q1 2026.
- iShares MBS ETF was a new Citadel Advisors position in Q1 2026.
- iShares MBS ETF made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #2992 holding.
- Citadel Advisors first reported a position in iShares MBS ETF in Q1 2014 and has held it in 23 quarters since.
- Citadel Advisors's iShares MBS ETF position peaked at $557M in Q1 2021.
- 1,019 funds tracked by Wall St. Rank held iShares MBS ETF as of Q1 2026.
Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.