Tortoise Investment Management’s iShares MBS ETF MBB Stock Holding History

Tortoise Investment Management’s Portfolio MBB Stock Details MBB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$616K	Sell	6,489 -30,513	-82%	-$2.92M	0.05%	145
2025 Q4	$3.52M	Sell	37,002 -14,884	-29%	-$1.42M	0.31%	73
2025 Q3	$4.94M	Sell	51,886 -18,945	-27%	-$1.78M	0.44%	60
2025 Q2	$6.65M	Sell	70,831 -7,330	-9%	-$679K	0.63%	50
2025 Q1	$7.33M	Sell	78,161 -38,488	-33%	-$3.56M	0.76%	44
2024 Q4	$10.7M	Sell	116,649 -21,116	-15%	-$1.97M	1.13%	30
2024 Q3	$13.2M	Sell	137,765 -80,579	-37%	-$7.62M	1.38%	21
2024 Q2	$20M	Sell	218,344 -4,070	-2%	-$371K	2.29%	6
2024 Q1	$20.6M	Sell	222,414 -7,347	-3%	-$680K	2.5%	5
2023 Q4	$21.6M	Sell	229,761 -76,547	-25%	-$6.87M	2.93%	4
2023 Q3	$27.2M	Buy	306,308 +32,820	+12%	+$3M	4.05%	3
2023 Q2	$25.5M	Buy	273,488 +76,909	+39%	+$7.23M	3.79%	3
2023 Q1	$18.6M	Buy	196,579 +33,445	+21%	+$3.16M	2.97%	4
2022 Q4	$15.1M	Buy	163,134 +14,020	+9%	+$1.29M	2.65%	6
2022 Q3	$13.7M	Buy	149,114 +25,880	+21%	+$2.51M	2.66%	5
2022 Q2	$12M	Buy	123,234 +58,192	+89%	+$5.71M	2.36%	7
2022 Q1	$6.63M	Sell	65,042 -86,857	-57%	-$9.06M	1.23%	21
2021 Q4	$16.3M	Sell	151,899 -18,267	-11%	-$1.97M	3.05%	7
2021 Q3	$18.4M	Sell	170,166 -23,075	-12%	-$2.5M	3.72%	3
2021 Q2	$20.9M	Sell	193,241 -96,045	-33%	-$10.4M	4.32%	3
2021 Q1	$31.4M	Sell	289,286 -41,544	-13%	-$4.55M	6.89%	2
2020 Q4	$36.4M	Buy	330,830 +79,449	+32%	+$8.75M	8.31%	2
2020 Q3	$27.8M	Buy	251,381 +17,424	+7%	+$1.93M	6.77%	2
2020 Q2	$25.9M	Buy	233,957 +22,556	+11%	+$2.5M	6.69%	2
2020 Q1	$23.3M	Buy	211,401 +29,508	+16%	+$3.21M	6.77%	2
2019 Q4	$19.7M	Buy	181,893 +142,259	+359%	+$15.4M	4.63%	3
2019 Q3	$4.29M	Buy	+39,634	New	+$4.28M	1.11%	25
2013 Q4	–	Sell	-275	Closed	-$29K	–	367
2013 Q3	$29K	Hold	275	–	–	0.02%	186
2013 Q2	$29K	Buy	+275	New	+$29.4K	0.02%	177

Other funds holding MBB

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Envestnet Asset Management Chicago, Illinois $374B AUM 17.66% 1-Year Est. Return

LPL Financial San Diego, California $377B AUM 19.32% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

TWIM

TIAA Wealth Investment Management New York $13.1B AUM

Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

TCIIS

TIAA-CREF Individual & Institutional Services New York $26B AUM

Truist Financial Charlotte, North Carolina $83.7B AUM 27.22% 1-Year Est. Return

Tortoise Investment Management's MBB Position: Q1 2026 in Review

Tortoise Investment Management reduced its iShares MBS ETF (MBB) stake by 82% in Q1 2026, selling an estimated $2.92M and leaving 6,489 shares worth $616K. The position accounts for 0.05% of the portfolio, ranked #145.

Tortoise Investment Management first reported a position in MBB in Q2 2013 and has held it in 29 quarters since. The position peaked at $36.4M in Q4 2020. 1,021 funds tracked by Wall St. Rank hold MBB as of Q1 2026.

Tortoise Investment Management held 6,489 shares of iShares MBS ETF worth $616K as of Q1 2026.
Tortoise Investment Management sold 30,513 iShares MBS ETF shares in Q1 2026, an estimated $2.92M.
iShares MBS ETF made up 0.05% of Tortoise Investment Management's portfolio in Q1 2026, its #145 holding.
Tortoise Investment Management first reported a position in iShares MBS ETF in Q2 2013 and has held it in 29 quarters since.
Tortoise Investment Management's iShares MBS ETF position peaked at $36.4M in Q4 2020.
1,021 funds tracked by Wall St. Rank held iShares MBS ETF as of Q1 2026.

Based on Tortoise Investment Management's 13F filing for Q1 2026, filed 5 May 2026.