September 2026 update

iShares US Mortgage Backed Securities UCITS ETF · IE000MFEI2J0 · IMGP

Rebalix monthly basket snapshots compared: 6 August 2026 → 31 August 2026 (issuer-declared dates; each section states its own)

In brief: 4 holdings added and 0 removed from the basket · 3 weight changes beyond ±0.25 points · NAV change over the period +0.0% · costs and key facts unchanged.

The largest sector move is MBS Pass-Through, up 1.1 percentage points. Among countries, United States falls by 1.4 percentage points. 4 holdings entered the basket and 0 left.

Declared positions

605

604 → 605 · Δ +1

as of 31 Aug

NAV change over the period

+0.0%

in GBP · 6 Aug → 31 Aug

Assets at month end

181 mln £

+0.7% in the month

Duration (effective)

5.6 yrs

first reading on record

as of 20 Aug

This page pictures the ETF’s basket, not the index. Because the fund uses optimised replication, portfolio changes reflect how the replication is implemented and do not necessarily coincide with the official index reviews.

Basket

Source: basket file published by the issuer, as of 20 Aug and 31 Aug, compared holding by holding by Rebalix (cash excluded, lines of the same holding merged).

Holdings added (4)

GNMA2 30YR 2021 PRODUCTION0.10%

FHLMC 30YR UMBS SUPER0.07%

FNMA 30YR0.04%

FHLMC 30YR UMBS SUPER0.03%

Holdings removed (0)

None.

Holdings compared (excluding cash instruments, lines of the same holding merged): 574 → 578, issuer files of 20 Aug and 31 Aug.

Weight changes beyond ±0.25 points (3)

UMBS 30YR TBA(REG A)

2.2 → 3.9% · +1.68 p.p.

GNMA2 30YR 2024 PRODUCTION

1.0 → 1.5% · +0.43 p.p.

FHLMC 30YR UMBS MIRROR

0.1 → 0.3% · +0.29 p.p.

Top 10 holdings

The largest holdings are issues of the same sovereign issuer: comparing them one by one says nothing. The useful reading is by country, below.

Sectors and countries

Source: aggregate breakdowns declared by the issuer in the two snapshots (6 Aug and 31 Aug).

Sectors — where the weight moved

MBS Pass-Through

98.7 → 99.8% · +1.05 p.p.

Bars scaled to the change: orange = up, grey = down. Basket percentages at the two snapshots.

Countries — where the weight moved

United States

92.2 → 90.8% · −1.38 p.p.

Ireland

7.7 → 8.9% · +1.29 p.p.

Mexico

0.0 → 0.0% · +0.00 p.p.

European Union

0.1 → 0.1% · +0.00 p.p.

United Kingdom

0.0 → 0.0% · +0.00 p.p.

The five countries that moved the most between the two snapshots.

See the numbers as a table

Country	6 Aug	31 Aug
United States	92.2%	90.8%
Ireland	7.7%	8.9%
European Union	0.1%	0.1%
2 more countries below 0.05% in both snapshots

Maturities and ratings

Source: issuer factsheet with data as of 20 Aug; preserved in Rebalix’s monthly registry snapshot (2026-09).

Issuer-declared breakdowns, preserved in Rebalix’s monthly registry snapshots (as of 20 August 2026). Labels and order are the issuer document’s.

Maturities

0 - 1 Years

0.0%

1 - 2 Years

0.1%

2 - 3 Years

0.3%

3 - 5 Years

13.2%

5 - 7 Years

18.9%

7 - 10 Years

65.7%

10 - 15 Years

0.1%

Cash and Derivatives

1.6%

this month (2026-09)the comparison with the prior month starts with the next snapshot

Rating — average AA (media ponderata dal breakdown)

98.4%

Cash and/or Derivatives

1.6%

this month (2026-09)the comparison with the prior month starts with the next snapshot

NAV and assets over the period

Source: daily NAV series published by the issuer.

NAV over the period (GBP)

6 Aug31 Aug

4.98 → 4.98: +0.0% from 6 Aug to 31 Aug, the last NAV available at each snapshot date.

Assets over the month

3 Aug31 Aug

179 mln £ → 181 mln £ (issuer’s daily series).

Costs and key facts

Source: issuer KID (costs as of 2 Sept); Rebalix events register.

TER

0.30%

unchanged

Transaction costs (KID)

0.04%

unchanged

Index, name, policy

unchanged

Issuer-declared basket snapshots, compared by Rebalix. Each section states its own dates: the basket comparison uses the issuer file dates; top 10, composition and breakdowns the dates of the two archived snapshots; maturities, ratings and duration the monthly registry snapshots. Weight changes are shown above ±0.25 points (the archive records them from ±0.1). We record the past: nothing on this page is a recommendation.