BlackRock’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 | $218M | Buy |
2,311,312
+88,923
| +4% | +$8.41M | ﹤0.01% | 1743 |
|
|
2026
Q1 | $211M | Sell |
2,222,389
-28,218
| -1% | -$2.7M | ﹤0.01% | 1640 |
|
|
2025
Q4 | $214M | Sell |
2,250,607
-129,238
| -5% | -$12.3M | ﹤0.01% | 1643 |
|
|
2025
Q3 | $226M | Buy |
2,379,845
+61,805
| +3% | +$5.81M | ﹤0.01% | 1600 |
|
|
2025
Q2 | $218M | Sell |
2,318,040
-1,175
| -0.1% | -$109K | ﹤0.01% | 1583 |
|
|
2025
Q1 | $217M | Sell |
2,319,215
-124,353
| -5% | -$11.5M | ﹤0.01% | 1553 |
|
|
2024
Q4 | $224M | Buy |
2,443,568
+225,883
| +10% | +$21M | ﹤0.01% | 1602 |
|
|
2024
Q3 | $212M | Sell |
2,217,685
-41,573
| -2% | -$3.93M | ﹤0.01% | 1623 |
|
|
2024
Q2 | $207M | Sell |
2,259,258
-156,422
| -6% | -$14.2M | ﹤0.01% | 1599 |
|
|
2024
Q1 | $223M | Sell |
2,415,680
-183,798
| -7% | -$17M | 0.01% | 1574 |
|
|
2023
Q4 | $245M | Sell |
2,599,478
-3,947,197
| -60% | -$354M | 0.01% | 1525 |
|
|
2023
Q3 | $581M | Sell |
6,546,675
-95,185
| -1% | -$8.7M | 0.02% | 803 |
|
|
2023
Q2 | $619M | Buy |
6,641,860
+2,096,973
| +46% | +$197M | 0.02% | 795 |
|
|
2023
Q1 | $431M | Buy |
4,544,887
+2,354,312
| +107% | +$222M | 0.01% | 1010 |
|
|
2022
Q4 | $203M | Buy |
2,190,575
+694,627
| +46% | +$64.1M | 0.01% | 1518 |
|
|
2022
Q3 | $137M | Sell |
1,495,948
-476,973
| -24% | -$46.2M | ﹤0.01% | 1751 |
|
|
2022
Q2 | $192M | Sell |
1,972,921
-221,810
| -10% | -$21.8M | 0.01% | 1561 |
|
|
2022
Q1 | $224M | Sell |
2,194,731
-513,295
| -19% | -$53.6M | 0.01% | 1592 |
|
|
2021
Q4 | $291M | Buy |
2,708,026
+24,021
| +0.9% | +$2.59M | 0.01% | 1461 |
|
|
2021
Q3 | $290M | Buy |
2,684,005
+700,740
| +35% | +$76M | 0.01% | 1441 |
|
|
2021
Q2 | $215M | Buy |
1,983,265
+197,470
| +11% | +$21.4M | 0.01% | 1708 |
|
|
2021
Q1 | $194M | Sell |
1,785,795
-369,282
| -17% | -$40.4M | 0.01% | 1761 |
|
|
2020
Q4 | $237M | Buy |
2,155,077
+441,132
| +26% | +$48.6M | 0.01% | 1490 |
|
|
2020
Q3 | $189M | Sell |
1,713,945
-1,267,399
| -43% | -$140M | 0.01% | 1426 |
|
|
2020
Q2 | $330M | Sell |
2,981,344
-6,969,716
| -70% | -$772M | 0.01% | 981 |
|
|
2020
Q1 | $1.1B | Sell |
9,951,060
-533,373
| -5% | -$58M | 0.05% | 331 |
|
|
2019
Q4 | $1.13B | Buy |
10,484,433
+7,783,180
| +288% | +$841M | 0.04% | 418 |
|
|
2019
Q3 | $293M | Buy |
2,701,253
+660,686
| +32% | +$71.3M | 0.01% | 1131 |
|
|
2019
Q2 | $220M | Buy |
2,040,567
+667,106
| +49% | +$71M | 0.01% | 1360 |
|
|
2019
Q1 | $146M | Sell |
1,373,461
-190,580
| -12% | -$20M | 0.01% | 1639 |
|
|
2018
Q4 | $164M | Sell |
1,564,041
-105,330
| -6% | -$10.8M | 0.01% | 1459 |
|
|
2018
Q3 | $172M | Sell |
1,669,371
-451,597
| -21% | -$46.9M | 0.01% | 1585 |
|
|
2018
Q2 | $221M | Buy |
2,120,968
+370,497
| +21% | +$38.5M | 0.01% | 1383 |
|
|
2018
Q1 | $183M | Buy |
1,750,471
+156,387
| +10% | +$16.4M | 0.01% | 1428 |
|
|
2017
Q4 | $170M | Buy |
1,594,084
+229,753
| +17% | +$24.5M | 0.01% | 1506 |
|
|
2017
Q3 | $146M | Buy |
1,364,331
+501,699
| +58% | +$53.7M | 0.01% | 1588 |
|
|
2017
Q2 | $92.1M | Sell |
862,632
-434,224
| -33% | -$46.5M | ﹤0.01% | 1856 |
|
|
2017
Q1 | $138M | Buy |
1,296,856
+1,243,519
| +2,331% | +$132M | 0.01% | 1557 |
|
|
2016
Q4 | $5.67M | Buy |
53,337
+49,872
| +1,439% | +$5.39M | 0.01% | 899 |
|
|
2016
Q3 | $381K | Sell |
3,465
-81
| -2% | -$8.9K | ﹤0.01% | 1849 |
|
|
2016
Q2 | $390K | Sell |
3,546
-9,437
| -73% | -$1.03M | ﹤0.01% | 1768 |
|
|
2016
Q1 | $1.42M | Buy |
12,983
+12,964
| +68,232% | +$1.41M | ﹤0.01% | 1224 |
|
|
2015
Q4 | $2K | Buy |
+19
| New | +$2.07K | ﹤0.01% | 3321 |
|
Other funds holding MBB
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TCIIS
BlackRock's MBB Position: Q2 2026 in Review
BlackRock increased its iShares MBS ETF (MBB) stake by 4% in Q2 2026, buying an estimated $8.41M and bringing the position to 2,311,312 shares worth $218M. The position accounts for ﹤0.01% of the portfolio, ranked #1743.
BlackRock first reported a position in MBB in Q4 2015 and has held it in 43 quarters since. The position peaked at $1.13B in Q4 2019. 1,021 funds tracked by Wall St. Rank hold MBB as of Q2 2026.
- BlackRock held 2,311,312 shares of iShares MBS ETF worth $218M as of Q2 2026.
- BlackRock bought 88,923 iShares MBS ETF shares in Q2 2026, an estimated $8.41M.
- iShares MBS ETF made up ﹤0.01% of BlackRock's portfolio in Q2 2026, its #1743 holding.
- BlackRock first reported a position in iShares MBS ETF in Q4 2015 and has held it in 43 quarters since.
- BlackRock's iShares MBS ETF position peaked at $1.13B in Q4 2019.
- 1,021 funds tracked by Wall St. Rank held iShares MBS ETF as of Q2 2026.
Based on BlackRock's 13F filing for Q2 2026, filed 7 Aug 2026.