Backblaze, Inc.
US ˙ NasdaqGM ˙ US05637B1052

SecurityBLZE / Backblaze, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership158,923 shares
Latest Disclosed Value $ 548,284
Morgan Stanley reports 63.93% decrease in ownership of BLZE / Backblaze, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 158,923 shares of Backblaze, Inc. (US:BLZE) valued at $548,284 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 440,647 shares of Backblaze, Inc.. This represents a change in shares of -63.93% during the quarter. The current value of the position is $1,230,859 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)
2026-05-15 2026-03-31 13F BACKBLAZE COM CL A 05637B105 158,923 -281,724 -63.93 548 -73.31 0.0000
2026-05-27 2025-12-31 13F/A-1 BACKBLAZE COM CL A 05637B105 440,647 -73,083 -14.23 2,053 -56.93 0.0001
2026-02-13 2025-12-31 13F BACKBLAZE COM CL A 05637B105 440,647 -73,083 2,053 0.0001
2026-05-27 2025-09-30 13F/A-1 BACKBLAZE COM CL A 05637B105 513,730 174,311 51.36 4,767 155.47 0.0003
2025-11-14 2025-09-30 13F BACKBLAZE COM CL A 05637B105 513,730 174,311 4,767 0.0003
2025-08-15 2025-06-30 13F BACKBLAZE COM CL A 05637B105 339,419 -54,167 -13.76 1,867 -1.84 0.0001
2025-05-15 2025-03-31 13F BACKBLAZE COM CL A 05637B105 393,586 197,940 101.17 1,901 61.51 0.0001
2025-05-15 2024-12-31 13F/A-1 BACKBLAZE COM CL A 05637B105 195,646 -15,990 -7.56 1,178 -12.94 0.0001
2025-02-14 2024-12-31 13F BACKBLAZE COM CL A 05637B105 195,646 -15,990 1,178 0.0001
2025-05-14 2024-09-30 13F/A-2 BACKBLAZE COM CL A 05637B105 211,636 -97,955 -31.64 1,352 -29.10 0.0001
2025-02-14 2024-09-30 13F/A-1 BACKBLAZE COM CL A 05637B105 211,636 -97,955 1,352 0.0001
2024-11-14 2024-09-30 13F BACKBLAZE COM CL A 05637B105 211,636 -97,955 1,352 0.0001
2025-05-14 2024-06-30 13F/A-2 BACKBLAZE COM CL A 05637B105 309,591 -17,269 -5.28 1,907 -42.96 0.0001
2024-10-17 2024-06-30 13F/A-1 BACKBLAZE COM CL A 05637B105 309,591 -17,269 1,907 0.0001
2024-08-14 2024-06-30 13F BACKBLAZE COM CL A 05637B105 309,591 -17,269 1,907 0.0001
2024-10-17 2024-03-31 13F/A-2 BACKBLAZE COM CL A 05637B105 326,860 278,333 573.56 3,344 808.42 0.0003
2024-08-16 2024-03-31 13F/A-1 BACKBLAZE COM CL A 05637B105 326,860 278,333 3,344 0.0000
2024-05-15 2024-03-31 13F BACKBLAZE COM CL A 05637B105 326,860 278,333 3,344 0.0003
2024-08-16 2023-12-31 13F/A-1 BACKBLAZE COM CL A 05637B105 48,527 21,586 80.12 368 148.65 0.0000
2024-02-13 2023-12-31 13F BACKBLAZE COM CL A 05637B105 48,527 21,586 368 0.0000
2023-11-15 2023-09-30 13F BACKBLAZE COM CL A 05637B105 26,941 16,644 161.64 148 236.36 0.0000
2023-08-14 2023-06-30 13F BACKBLAZE COM CL A 05637B105 10,297 -2,697 -20.76 45 -32.31 0.0000
2023-05-15 2023-03-31 13F BACKBLAZE COM CL A 05637B105 12,994 -360 -2.70 66 -20.73 0.0000
2023-02-14 2022-12-31 13F BACKBLAZE COM CL A 05637B105 13,354 7,480 127.34 82 182.76 0.0000
2022-11-14 2022-09-30 13F BACKBLAZE COM CL A 05637B105 5,874 -529,037 -98.90 29 -98.96 0.0000
2022-10-27 2022-06-30 13F/A-1 BACKBLAZE COM CL A 05637B105 534,911 526,836 6,524.28 2,798 3,116.09 0.0004
2022-08-15 2022-06-30 13F BACKBLAZE COM CL A 05637B105 534,911 526,836 2,798 0.0001
2022-10-27 2022-03-31 13F/A-1 BACKBLAZE COM CL A 05637B105 8,075 -1,685 -17.26 87 -47.27 0.0000
2022-05-13 2022-03-31 13F BACKBLAZE COM CL A 05637B105 8,075 -1,685 87 0.0000
2022-02-14 2021-12-31 13F BACKBLAZE COM CL A 05637B105 9,760 9,760 165 0.0000
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.