iShares MBS ETF (MBB) Holdings $95.42 -0.04 (-0.04%) Closing price 09/12/2025 04:00 PM EasternExtended Trading$94.81 -0.61 (-0.64%) As of 05:33 AM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Holdings Stock AnalysisChartDividendHeadlinesHoldingsOptions ChainOwnershipShort InterestTrendsBuy This Stock Top 25 MBB HoldingsRankCompanyCurrent PriceWeightShares Held1BLACKROCK CASH CL INST SL AGENCYN/A5.08%2,085,943,8862FHLMC 30YR UMBS SUPER - 2.0 2051-05-01N/A1.01%516,484,4963GNMA2 30YR TBA(REG C) - 6.0 2025-09-22N/A0.95%381,750,0004GNMA2 30YR TBA(REG C) - 5.5 2025-09-22N/A0.62%249,433,0005GNMA2 30YR - 2.0 2051-10-20N/A0.55%272,952,2986GNMA2 30YR - 2.0 2051-12-20N/A0.54%268,065,9717FNMA 30YR UMBS - 2.0 2051-12-01N/A0.52%263,645,0048FHLMC 30YR UMBS SUPER - 2.0 2051-04-01N/A0.50%253,156,4379GNMA2 30YR - 2.5 2051-07-20N/A0.46%220,284,21510FNMA 30YR UMBS - 2.0 2051-11-01N/A0.44%223,540,913 Get the Latest News and Ratings for MBB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for iShares MBS ETF and its competitors with MarketBeat's FREE daily newsletter. 11FNMA 30YR UMBS SUPER - 2.0 2051-07-01N/A0.43%221,002,14412GNMA2 30YR TBA(REG C) - 6.5 2025-09-22N/A0.41%163,868,49313GNMA2 30YR - 5.0 2054-11-20N/A0.40%163,215,51014UMBS 30YR TBA(REG A) - 6.5 2025-09-15N/A0.40%158,225,00015GNMA2 30YR - 2.0 2052-03-20N/A0.37%182,716,69316FNMA 30YR UMBS - 3.0 2051-10-01N/A0.36%170,421,56017GNMA2 30YR - 2.5 2051-05-20N/A0.36%171,222,26918GNMA2 30YR - 5.5 2053-09-20N/A0.35%143,484,48719GNMA2 30YR TBA(REG C) - 5.0 2025-09-22N/A0.35%143,587,00020FHLMC 30YR UMBS SUPER - 2.0 2052-03-01N/A0.34%173,139,74621GNMA2 30YR - 2.5 2052-04-20N/A0.34%163,265,24022FNMA 30YR UMBS - 2.0 2051-03-01N/A0.32%164,791,13823FNMA 30YR UMBS SUPER - 2.0 2052-04-01N/A0.32%164,758,41024GNMA2 30YR - 2.0 2052-01-20N/A0.31%154,755,51825UMBS 15YR TBA(REG B) - 2.0 2025-09-18N/A0.31%140,295,791 Geographic ExposureUnited States96.0%Currency ExposureUSD100.0%Sector ExposureFinancials89.7%Industry ExposureThrifts & Mortgage Finance89.5%Diversified Financial Services0.2%SubIndustry ExposureThrifts & Mortgage Finance89.7%Coupon Exposure2-458.4%4-631.5%6-812.1%Maturity Exposure20-3079.7%10-157.8%0-14.3%30+3.3%15-202.4%5-101.1%3-50.1% Related Companies and Tools Related Companies Vanguard Mortgage-Backed Securities ETF Holdings First Trust Low Duration Opportunities ETF Holdings iShares GNMA Bond ETF Holdings This page (NASDAQ:MBB) was last updated on 9/15/2025 by MarketBeat.com Staff From Our PartnersOut of 18,347 Cryptocurrencies... 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