Blackstone Mortgage Trust, Inc.
US ˙ NYSE ˙ US09257W1009

SecurityBXMT / Blackstone Mortgage Trust, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership66,926 shares
Latest Disclosed Value $ 1,280,291
Sei Investments Co reports 11.49% increase in ownership of BXMT / Blackstone Mortgage Trust, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 66,926 shares of Blackstone Mortgage Trust, Inc. (US:BXMT) valued at $1,280,294 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 60,031 shares of Blackstone Mortgage Trust, Inc.. This represents a change in shares of 11.49% during the quarter. The current value of the position is $1,234,785 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.

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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)
2026-02-13 2025-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 66,926 6,895 11.49 1,280 15.84 0.0013
2025-11-13 2025-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 60,031 1,702 2.92 1,105 -1.52 0.0012
2025-08-14 2025-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 58,329 14,506 33.10 1,123 28.08 0.0013
2025-05-14 2025-03-31 13F/A-1 BLACKSTONE MTG TR COM CL A 09257W100 43,823 -18,272 -29.43 876 -18.96 0.0011
2025-05-13 2025-03-31 13F BLACKSTONE MTG TR COM CL A 09257W100 62,067 -28 1,082 0.0012
2025-02-11 2024-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 62,095 11,246 22.12 1,081 11.90 0.0014
2024-11-12 2024-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 50,849 40,296 381.84 967 427.87 0.0013
2024-08-13 2024-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 10,553 10,553 184 0.0003
2024-02-14 2023-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 0 -15,916 -100.00 0 -100.00
2023-11-14 2023-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 15,916 -70,103 -81.50 346 -80.67 0.0006
2023-08-11 2023-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 86,019 -8,071 -8.58 1,790 6.61 0.0031
2023-05-12 2023-03-31 13F BLACKSTONE MTG TR COM CL A 09257W100 94,090 19,000 25.30 1,680 5.66 0.0031
2023-02-10 2022-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 75,090 9,355 14.23 1,590 3.52 0.0035
2022-11-14 2022-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 65,735 45 0.07 1,535 -15.61 0.0034
2022-08-15 2022-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 65,690 8,089 14.04 1,819 -0.71 0.0039
2022-05-13 2022-03-31 13F BLACKSTONE MTG TR COM CL A 09257W100 57,601 -3,795 -6.18 1,832 -2.60 0.0037
2022-02-14 2021-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 61,396 10,187 19.89 1,881 21.12 0.0035
2021-11-12 2021-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 51,209 7,074 16.03 1,553 10.38 0.0033
2021-08-06 2021-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 44,135 -8,813 -16.64 1,407 -12.77 0.0031
2021-05-12 2021-03-31 13F BLACKSTONE MTG TR COM CL A 09257W100 52,948 -13,749 -20.61 1,613 -12.15 0.0041
2021-02-08 2020-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 66,697 5,579 9.13 1,836 35.10 0.0047
2020-12-04 2020-09-30 13F/A-1 BLACKSTONE MTG TR COM CL A 09257W100 61,118 -3,161 -4.92 1,359 -12.72 0.0039
2020-11-06 2020-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 63,471 -808 1,411 3,397.3743
2020-08-17 2020-06-30 13F/A-1 BLACKSTONE MTG TR COM CL A 09257W100 64,279 17,790 38.27 1,557 72.81 0.0048
2020-08-11 2020-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 9,320 -37,169 233 632.0249
2020-05-14 2020-03-31 13F BLACKSTONE MTG TR COM CL A 09257W100 46,489 36,738 376.76 901 153.09 0.0033
2020-02-06 2019-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 9,751 48 0.49 356 5.33 0.0011
2019-11-12 2019-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 9,703 -220 -2.22 338 -1.17 0.0009
2019-08-14 2019-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 9,923 2,533 34.28 342 35.71 0.0011
2019-05-15 2019-03-31 13F BLACKSTONE MTG TR COM CL A 09257W100 7,390 -52,093 -87.58 252 -87.34 0.0008
2019-02-13 2018-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 59,483 1,278 2.20 1,990 2.52 0.0071
2018-11-08 2018-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 58,205 -4,976 -7.88 1,941 -2.32 0.0070
2018-08-03 2018-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 63,181 16,203 34.49 1,987 34.62 0.0068
2018-05-11 2018-03-31 13F BLACKSTONE MTG TR COM CL A 09257W100 46,978 -694 -1.46 1,476 -3.78 0.0057
2018-02-08 2017-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 47,672 -14,442 -23.25 1,534 -20.39 0.0053
2017-11-06 2017-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 62,114 -12,094 -16.30 1,927 -17.79 0.0068
2017-07-31 2017-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 74,208 37,687 103.19 2,344 107.25 0.0093
2017-05-05 2017-03-31 13F BLACKSTONE MTG TR COM CL A 09257W100 36,521 -18,148 -33.20 1,131 -31.20 0.0050
2017-02-02 2016-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 54,669 8,253 17.78 1,644 20.18 0.0080
2016-11-04 2016-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 46,416 19,119 70.04 1,368 80.95 0.0069
2016-08-11 2016-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 27,297 6,168 29.19 756 33.10 0.0045
2016-05-10 2016-03-31 13F/A-1 BLACKSTONE MTG TR COM CL A 09257W100 21,129 3,337 18.76 568 19.08 0.0035
2016-02-03 2015-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 17,792 -18,705 -51.25 477 -52.35 0.0029
2015-11-02 2015-09-30 13F/A-1 BLACKSTONE MTG TR COM CL A 09257W100 36,497 5,450 17.55 1,001 15.86 0.0092
2015-10-30 2015-09-30 13F BLACKSTONE MTG TR COM CL A 09257W100 36,497 1,002
2015-08-07 2015-06-30 13F/A-1 BLACKSTONE MTG TR COM CL A 09257W100 31,047 25,307 440.89 864 430.06 0.0078
2015-08-04 2015-06-30 13F BLACKSTONE MTG TR COM CL A 09257W100 31,047 25,307 864 0.0078
2015-05-14 2015-03-31 13F/A-1 BLACKSTONE MTG TR COM CL A 09257W100 5,740 689 13.64 163 11.64 0.0014
2015-05-01 2015-03-31 13F BLACKSTONE MTG TR COM CL A 09257W100 5,740 163
2015-02-10 2014-12-31 13F BLACKSTONE MTG TR COM CL A 09257W100 5,051 5,051 146 0.0013
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.