Backblaze, Inc.
US ˙ NasdaqGM ˙ US05637B1052

SecurityBLZE / Backblaze, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership1,112,650 shares
Latest Disclosed Value $ 3,838,643
State Street Corp reports 4.98% increase in ownership of BLZE / Backblaze, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 1,112,650 shares of Backblaze, Inc. (US:BLZE) valued at $3,838,642 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,059,890 shares of Backblaze, Inc.. This represents a change in shares of 4.98% during the quarter. The current value of the position is $9,324,007 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 1,112,650 52,760 4.98 3,839 -22.29 0.0001
2026-02-13 2025-12-31 13F BACKBLAZE COM CL A 05637B105 1,059,890 2,196 0.21 4,939 -49.68 0.0002
2025-11-14 2025-09-30 13F BACKBLAZE COM CL A 05637B105 1,057,694 215,214 25.55 9,815 111.85 0.0003
2025-08-14 2025-06-30 13F BACKBLAZE COM CL A 05637B105 842,480 156,702 22.85 4,634 39.89 0.0002
2025-05-15 2025-03-31 13F BACKBLAZE COM CL A 05637B105 685,778 70,986 11.55 3,312 -10.51 0.0001
2025-02-14 2024-12-31 13F BACKBLAZE COM CL A 05637B105 614,792 8,479 1.40 3,701 -4.47 0.0001
2024-11-14 2024-09-30 13F BACKBLAZE COM CL A 05637B105 606,313 138,917 29.72 3,874 34.56 0.0002
2024-08-14 2024-06-30 13F BACKBLAZE COM CL A 05637B105 467,396 352,802 307.87 2,879 145.65 0.0001
2024-05-15 2024-03-31 13F BACKBLAZE COM CL A 05637B105 114,594 45,600 66.09 1,172 124.09 0.0001
2024-02-14 2023-12-31 13F BACKBLAZE COM CL A 05637B105 68,994 12,400 21.91 524 68.17 0.0000
2023-11-14 2023-09-30 13F BACKBLAZE COM CL A 05637B105 56,594 20,500 56.80 311 99.36 0.0000
2023-08-14 2023-06-30 13F BACKBLAZE COM CL A 05637B105 36,094 0 0.00 156 -14.29 0.0000
2023-05-15 2023-03-31 13F BACKBLAZE COM CL A 05637B105 36,094 4,600 14.61 182 -5.70 0.0000
2023-05-15 2022-12-31 13F/A-99 BACKBLAZE COM CL A 05637B105 31,494 7,000 28.58 194 58.20 0.0000
2023-05-15 2022-12-31 13F BACKBLAZE COM CL A 05637B105 31,494 7,000 194 0.0000
2022-11-15 2022-09-30 13F BACKBLAZE COM CL A 05637B105 24,494 0 0.00 122 -4.69 0.0000
2022-08-15 2022-06-30 13F BACKBLAZE COM CL A 05637B105 24,494 0 0.00 128 -50.96 0.0000
2022-05-16 2022-03-31 13F BACKBLAZE COM CL A 05637B105 24,494 24,494 261 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.