Janus Detroit Street Trust - Janus Henderson Mortgage-Backed Securities ETF
US ˙ ARCA ˙ US47103U8523

SecurityJMBS / Janus Detroit Street Trust - Janus Henderson Mortgage-Backed Securities ETF
InstitutionMorgan Stanley
Latest Disclosed Ownership28,558,480 shares
Latest Disclosed Value $ 1,290,272,148
Morgan Stanley reports 12.38% increase in ownership of JMBS / Janus Detroit Street Trust - Janus Henderson Mortgage-Backed Securities ETF

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 28,558,480 shares of Janus Detroit Street Trust - Janus Henderson Mortgage-Backed Securities ETF (US:JMBS) valued at $1,290,272,126 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 25,412,542 shares of Janus Detroit Street Trust - Janus Henderson Mortgage-Backed Securities ETF. This represents a change in shares of 12.38% during the quarter. The current value of the position is $1,278,848,734 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 28,558,480 3,145,938 12.38 1,290,272 11.13 0.0777
2026-05-27 2025-12-31 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 25,412,542 4,119,668 19.35 1,161,099 19.40 0.0693
2026-02-13 2025-12-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 25,412,542 4,119,668 1,161,099 0.0693
2026-05-27 2025-09-30 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 21,292,874 1,087,802 5.38 972,446 6.83 0.0589
2025-11-14 2025-09-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 21,292,874 1,087,802 972,446 0.0589
2025-08-15 2025-06-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 20,205,072 2,135,075 11.82 910,239 11.44 0.0593
2025-05-15 2025-03-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 18,069,997 2,193,081 13.81 816,764 16.44 0.0584
2025-05-15 2024-12-31 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 15,876,916 3,215,129 25.39 701,442 18.75 0.0491
2025-02-14 2024-12-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 15,876,916 3,215,129 701,442 0.0491
2025-05-14 2024-09-30 13F/A-2 JANUS DETROIT STR TR HENDERSON MTG 47103U852 12,661,787 1,356,268 12.00 590,672 17.01 0.0428
2025-02-14 2024-09-30 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 12,661,787 1,356,268 590,672 0.0428
2024-11-14 2024-09-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 12,661,787 1,356,268 590,672 0.0051
2025-05-14 2024-06-30 13F/A-2 JANUS DETROIT STR TR HENDERSON MTG 47103U852 11,305,519 3,105,257 37.87 504,791 36.49 0.0391
2024-10-17 2024-06-30 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 11,305,519 3,105,257 504,791 0.0391
2024-08-14 2024-06-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 11,305,519 3,105,257 504,791 0.0391
2024-10-17 2024-03-31 13F/A-2 JANUS DETROIT STR TR HENDERSON MTG 47103U852 8,200,262 1,169,796 16.64 369,832 14.51 0.0297
2024-08-16 2024-03-31 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 8,200,262 1,169,796 369,832 0.0035
2024-05-15 2024-03-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 8,200,262 1,169,796 369,832 0.0297
2024-08-16 2023-12-31 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 7,030,466 3,003,984 74.61 322,980 84.82 0.0285
2024-02-13 2023-12-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 7,030,466 3,003,984 322,980 0.0285
2023-11-15 2023-09-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 4,026,482 331,827 8.98 174,749 3.36 0.0178
2023-08-14 2023-06-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 3,694,655 439,307 13.49 169,067 11.23 0.0167
2023-05-15 2023-03-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 3,255,348 1,250,560 62.38 151,992 66.77 0.0163
2023-02-14 2022-12-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 2,004,788 353,993 21.44 91,138 22.60 0.0104
2022-11-14 2022-09-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,650,795 449,823 37.45 74,334 29.05 0.0101
2022-10-27 2022-06-30 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,200,972 -51,221 -4.09 57,599 -7.85 0.0075
2022-08-15 2022-06-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,200,972 -51,221 57,599 0.0015
2022-10-27 2022-03-31 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,252,193 -283,351 -18.45 62,503 -22.73 0.0084
2022-05-13 2022-03-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,252,193 -283,351 62,503 0.0084
2022-02-14 2021-12-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,535,544 -30,000 -1.92 80,892 -2.79 0.0100
2021-11-15 2021-09-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,565,544 21,581 1.40 83,216 1.42 0.0112
2021-08-23 2021-06-30 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,543,963 27,749 1.83 82,054 1.99 0.0108
2021-08-16 2021-06-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,543,963 27,749 82,054 0.0022
2021-05-17 2021-03-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,516,214 157,878 11.62 80,450 10.79 0.0118
2021-02-16 2020-12-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,358,336 115,674 9.31 72,617 8.99 0.0112
2020-11-13 2020-09-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,242,662 154,219 14.17 66,626 14.01 0.0129
2020-08-14 2020-06-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 1,088,443 268,042 32.67 58,439 36.85 0.0129
2020-05-26 2020-03-31 13F/A-1 JANUS DETROIT STR TR HENDERSON MTG 47103U852 820,401 415,341 102.54 42,702 102.62 0.0116
2020-05-15 2020-03-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 820,401 819,919 42,702 3,280.4038
2020-02-14 2019-12-31 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 405,060 306,709 311.85 21,075 308.51 0.0049
2019-11-14 2019-09-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 98,351 74,215 307.49 5,159 311.40 0.0014
2019-08-14 2019-06-30 13F JANUS DETROIT STR TR HENDERSON MTG 47103U852 24,136 24,136 1,254 0.0003
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.