SEI Investments’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
Q2
$225M Buy
2,380,025
+185,578
+8% +$17.5M 0.2% 86
2026
Q1
$208M Buy
2,194,447
+108,361
+5% +$10.4M 0.19% 95
2025
Q4
$199M Sell
2,086,086
-90,168
-4% -$8.6M 0.2% 88
2025
Q3
$207M Buy
2,176,254
+240,833
+12% +$22.6M 0.22% 71
2025
Q2
$182M Sell
1,935,421
-112,091
-5% -$10.4M 0.21% 74
2025
Q1
$192M Sell
2,047,512
-9,663
-0.5% -$894K 0.25% 67
2024
Q4
$189M Buy
2,057,175
+147,930
+8% +$13.8M 0.24% 68
2024
Q3
$183M Sell
1,909,245
-478,511
-20% -$45.2M 0.24% 72
2024
Q2
$219M Buy
2,387,756
+411,096
+21% +$37.4M 0.31% 54
2024
Q1
$183M Buy
1,976,660
+100,010
+5% +$9.25M 0.27% 69
2023
Q4
$177M Buy
1,876,650
+34,864
+2% +$3.13M 0.28% 64
2023
Q3
$164M Buy
1,841,786
+131,566
+8% +$12M 0.29% 60
2023
Q2
$160M Buy
1,710,220
+1,375,889
+412% +$129M 0.28% 65
2023
Q1
$31.7M Sell
334,331
-4,721
-1% -$446K 0.06% 366
2022
Q4
$31.4M Buy
339,052
+13,318
+4% +$1.23M 0.07% 316
2022
Q3
$29.8M Sell
325,734
-1,017
-0.3% -$98.6K 0.07% 329
2022
Q2
$31.9M Buy
326,751
+2,825
+0.9% +$277K 0.07% 308
2022
Q1
$33M Buy
323,926
+12,332
+4% +$1.29M 0.07% 318
2021
Q4
$33.5M Buy
311,594
+15,036
+5% +$1.62M 0.06% 318
2021
Q3
$32.1M Buy
296,558
+50,114
+20% +$5.44M 0.07% 307
2021
Q2
$26.7M Buy
246,444
+2,455
+1% +$266K 0.06% 326
2021
Q1
$26.5M Sell
243,989
-130,821
-35% -$14.3M 0.07% 301
2020
Q4
$41.3M Buy
374,810
+8,139
+2% +$896K 0.11% 184
2020
Q3
$40.5M Sell
366,671
-38,416
-9% -$4.25M 0.12% 151
2020
Q2
$44.8M Buy
405,087
+35,255
+10% +$3.9M 0.14% 131
2020
Q1
$40.8M Buy
369,832
+42,408
+13% +$4.61M 0.15% 112
2019
Q4
$35.4M Buy
327,424
+36,377
+12% +$3.93M 0.11% 180
2019
Q3
$31.5M Buy
291,047
+36,266
+14% +$3.91M 0.08% 225
2019
Q2
$27.4M Buy
254,781
+34,265
+16% +$3.65M 0.09% 226
2019
Q1
$23.5M Buy
220,516
+47,451
+27% +$4.99M 0.08% 253
2018
Q4
$17.9M Buy
173,065
+707
+0.4% +$72.7K 0.06% 330
2018
Q3
$17.8M Buy
172,358
+16,610
+11% +$1.72M 0.06% 314
2018
Q2
$16.2M Buy
155,748
+18,247
+13% +$1.89M 0.06% 366
2018
Q1
$14.4M Buy
137,501
+28,711
+26% +$3.01M 0.06% 357
2017
Q4
$11.6M Buy
108,790
+19,451
+22% +$2.08M 0.04% 548
2017
Q3
$9.57M Buy
89,339
+9,792
+12% +$1.05M 0.03% 615
2017
Q2
$8.49M Buy
79,547
+7,574
+11% +$810K 0.03% 618
2017
Q1
$7.67M Buy
71,973
+11,011
+18% +$1.17M 0.03% 615
2016
Q4
$6.48M Buy
60,962
+16,151
+36% +$1.75M 0.03% 652
2016
Q3
$4.93M Buy
44,811
+9,750
+28% +$1.07M 0.03% 713
2016
Q2
$3.86M Buy
35,061
+5,824
+20% +$637K 0.02% 728
2016
Q1
$3.2M Buy
29,237
+7,323
+33% +$798K 0.02% 786
2015
Q4
$2.36M Buy
21,914
+9,275
+73% +$1.01M 0.01% 940
2015
Q3
$1.39M Buy
12,639
+757
+6% +$82.6K 0.01% 936
2015
Q2
$1.29M Buy
11,882
+5,814
+96% +$637K 0.01% 899
2015
Q1
$670K Buy
6,068
+4,678
+337% +$514K 0.01% 1099
2014
Q4
$152K Buy
+1,390
New +$152K ﹤0.01% 1484

Other funds holding MBB

SEI Investments's MBB Position: Q2 2026 in Review

SEI Investments increased its iShares MBS ETF (MBB) stake by 8.5% in Q2 2026, buying an estimated $17.5M and bringing the position to 2,380,025 shares worth $225M. The position accounts for 0.2% of the portfolio, ranked #86.

SEI Investments first reported a position in MBB in Q4 2014 and has held it in 47 quarters since. 1,021 funds tracked by Wall St. Rank hold MBB as of Q2 2026.

  • SEI Investments held 2,380,025 shares of iShares MBS ETF worth $225M as of Q2 2026.
  • SEI Investments bought 185,578 iShares MBS ETF shares in Q2 2026, an estimated $17.5M.
  • iShares MBS ETF made up 0.2% of SEI Investments's portfolio in Q2 2026, its #86 holding.
  • SEI Investments first reported a position in iShares MBS ETF in Q4 2014 and has held it in 47 quarters since.
  • 1,021 funds tracked by Wall St. Rank held iShares MBS ETF as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.