Backblaze, Inc.
US ˙ NasdaqGM ˙ US05637B1052

SecurityBLZE / Backblaze, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership2,986 shares
Latest Disclosed Value $ 10,301
Citigroup Inc reports 85.81% increase in ownership of BLZE / Backblaze, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 2,986 shares of Backblaze, Inc. (US:BLZE) valued at $10,302 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,607 shares of Backblaze, Inc.. This represents a change in shares of 85.81% during the quarter. The current value of the position is $23,739 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)
2026-05-11 2026-03-31 13F BACKBLAZE COM CL A 05637B105 2,986 1,379 85.81 10 42.86 0.0000
2026-02-13 2025-12-31 13F BACKBLAZE COM CL A 05637B105 1,607 -668 -29.36 7 -66.67 0.0000
2025-11-10 2025-09-30 13F BACKBLAZE COM CL A 05637B105 2,275 -16,743 -88.04 21 -79.81 0.0000
2025-08-11 2025-06-30 13F BACKBLAZE COM CL A 05637B105 19,018 -13,681 -41.84 105 -33.76 0.0001
2025-05-12 2025-03-31 13F BACKBLAZE COM CL A 05637B105 32,699 -6,619 -16.83 158 -33.47 0.0001
2025-02-12 2024-12-31 13F BACKBLAZE COM CL A 05637B105 39,318 10,525 36.55 237 28.96 0.0001
2024-11-12 2024-09-30 13F BACKBLAZE COM CL A 05637B105 28,793 20,109 231.56 184 245.28 0.0001
2024-08-12 2024-06-30 13F BACKBLAZE COM CL A 05637B105 8,684 -93,645 -91.51 53 -94.93 0.0000
2024-05-10 2024-03-31 13F BACKBLAZE COM CL A 05637B105 102,329 -11,575 -10.16 1,047 21.06 0.0007
2024-02-09 2023-12-31 13F BACKBLAZE COM CL A 05637B105 113,904 55,023 93.45 865 167.49 0.0006
2023-12-06 2023-09-30 13F/A-1 BACKBLAZE COM CL A 05637B105 58,881 58,881 324 0.0002
2023-11-09 2023-09-30 13F BACKBLAZE COM CL A 05637B105 58,881 58,881 324 0.0002
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.