UBS AM’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 | $404M | Sell |
4,278,858
-20,469
| -0.5% | -$1.94M | 0.07% | 219 |
|
|
2026
Q1 | $408M | Buy |
4,299,327
+2,855,984
| +198% | +$273M | 0.08% | 212 |
|
|
2025
Q4 | $137M | Buy |
+1,443,343
| New | +$138M | 0.03% | 434 |
|
|
2025
Q3 | – | Sell |
-1,040,098
| Closed | -$97.7M | – | 563 |
|
|
2025
Q2 | $97.7M | Sell |
1,040,098
-12,500
| -1% | -$1.16M | 0.02% | 539 |
|
|
2025
Q1 | $98.7M | Buy |
+1,052,598
| New | +$97.4M | 0.03% | 538 |
|
|
2024
Q4 | – | Sell |
-804,598
| Closed | -$77.1M | – | 2722 |
|
|
2024
Q3 | $77.1M | Buy |
804,598
+703,598
| +697% | +$66.5M | 0.02% | 578 |
|
|
2024
Q2 | $9.27M | Buy |
+101,000
| New | +$9.2M | ﹤0.01% | 1168 |
|
|
2024
Q1 | – | Hold |
0
| – | – | – | 833 |
|
|
2023
Q4 | – | Hold |
0
| – | – | – | 760 |
|
|
2023
Q3 | – | Hold |
0
| – | – | – | 809 |
|
|
2023
Q2 | – | Hold |
0
| – | – | – | 806 |
|
|
2023
Q1 | – | Hold |
0
| – | – | – | 806 |
|
|
2022
Q4 | – | Hold |
0
| – | – | – | 855 |
|
|
2022
Q3 | – | Hold |
0
| – | – | – | 588 |
|
|
2022
Q2 | – | Hold |
0
| – | – | – | 834 |
|
|
2022
Q1 | – | Hold |
0
| – | – | – | 752 |
|
|
2021
Q4 | – | Hold |
0
| – | – | – | 954 |
|
|
2021
Q3 | – | Hold |
0
| – | – | – | 754 |
|
|
2019
Q4 | – | Sell |
-34,402
| Closed | -$3.73M | – | 2714 |
|
|
2019
Q3 | $3.73M | Buy |
34,402
+287
| +0.8% | +$31K | ﹤0.01% | 1326 |
|
|
2019
Q2 | $3.67M | Buy |
+34,115
| New | +$3.63M | ﹤0.01% | 1319 |
|
|
2019
Q1 | – | Hold |
0
| – | – | – | 945 |
|
|
2018
Q4 | – | Hold |
0
| – | – | – | 889 |
|
|
2018
Q3 | – | Hold |
0
| – | – | – | 939 |
|
|
2018
Q2 | – | Hold |
0
| – | – | – | 944 |
|
|
2018
Q1 | – | Hold |
0
| – | – | – | 922 |
|
|
2017
Q4 | – | Hold |
0
| – | – | – | 920 |
|
|
2017
Q3 | – | Hold |
0
| – | – | – | 899 |
|
|
2017
Q2 | – | Hold |
0
| – | – | – | 902 |
|
|
2017
Q1 | – | Sell |
-16,889
| Closed | -$1.79M | – | 881 |
|
|
2016
Q4 | $6.42M | Buy |
+16,889
| New | +$1.83M | 0.01% | 948 |
|
|
2016
Q3 | – | Hold |
0
| – | – | – | 967 |
|
|
2016
Q2 | – | Hold |
0
| – | – | – | 960 |
|
|
2016
Q1 | – | Hold |
0
| – | – | – | 1385 |
|
|
2015
Q4 | – | Hold |
0
| – | – | – | 1369 |
|
|
2015
Q3 | – | Hold |
0
| – | – | – | 1320 |
|
|
2015
Q2 | – | Hold |
0
| – | – | – | 1297 |
|
|
2015
Q1 | – | Hold |
0
| – | – | – | 1310 |
|
|
2014
Q4 | – | Hold |
0
| – | – | – | 1301 |
|
|
2014
Q3 | – | Hold |
0
| – | – | – | 1181 |
|
|
2014
Q2 | – | Hold |
0
| – | – | – | 1288 |
|
|
2014
Q1 | – | Hold |
0
| – | – | – | 1442 |
|
|
2013
Q4 | – | Hold |
0
| – | – | – | 1497 |
|
|
2013
Q3 | – | Hold |
0
| – | – | – | 1465 |
|
|
2013
Q2 | – | Hold |
0
| – | – | – | 1359 |
|
Other funds holding MBB
TWIM
TCIIS
UBS AM's MBB Position: Q2 2026 in Review
UBS AM reduced its iShares MBS ETF (MBB) stake by 0.48% in Q2 2026, selling an estimated $1.94M and leaving 4,278,858 shares worth $404M. The position accounts for 0.07% of the portfolio, ranked #219.
UBS AM first reported a position in MBB in Q4 2016 and has held it in 10 quarters since. The position peaked at $408M in Q1 2026. 1,029 funds tracked by Wall St. Rank hold MBB as of Q2 2026.
- UBS AM held 4,278,858 shares of iShares MBS ETF worth $404M as of Q2 2026.
- UBS AM sold 20,469 iShares MBS ETF shares in Q2 2026, an estimated $1.94M.
- iShares MBS ETF made up 0.07% of UBS AM's portfolio in Q2 2026, its #219 holding.
- UBS AM first reported a position in iShares MBS ETF in Q4 2016 and has held it in 10 quarters since.
- UBS AM's iShares MBS ETF position peaked at $408M in Q1 2026.
- 1,029 funds tracked by Wall St. Rank held iShares MBS ETF as of Q2 2026.
Based on UBS AM's 13F filing for Q2 2026, filed 13 Aug 2026.