Backblaze, Inc.
US ˙ NasdaqGM ˙ US05637B1052

SecurityBLZE / Backblaze, Inc.
InstitutionD. E. Shaw & Co., Inc.
ManagerDE Shaw
Latest Disclosed Ownership739,033 shares
Latest Disclosed Value $ 2,549,664
D. E. Shaw & Co., Inc. reports 57.55% increase in ownership of BLZE / Backblaze, Inc.

On May 15, 2026 - D. E. Shaw & Co., Inc. filed a 13F-HR form disclosing ownership of 739,033 shares of Backblaze, Inc. (US:BLZE) valued at $2,549,664 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 469,066 shares of Backblaze, Inc.. This represents a change in shares of 57.55% during the quarter. The current value of the position is $5,875,312 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 739,033 269,967 57.55 2,550 16.66 0.0015
2026-02-17 2025-12-31 13F BACKBLAZE COM CL A 05637B105 469,066 105,115 28.88 2,186 -35.30 0.0012
2025-11-14 2025-09-30 13F BACKBLAZE COM CL A 05637B105 363,951 321,679 760.97 3,377 1,355.60 0.0019
2025-08-14 2025-06-30 13F BACKBLAZE COM CL A 05637B105 42,272 -109,867 -72.21 232 -68.39 0.0002
2025-05-15 2025-03-31 13F BACKBLAZE COM CL A 05637B105 152,139 36,145 31.16 735 5.16 0.0007
2025-02-14 2024-12-31 13F BACKBLAZE COM CL A 05637B105 115,994 87,194 302.76 698 279.35 0.0005
2024-11-14 2024-09-30 13F BACKBLAZE COM CL A 05637B105 28,800 -102,730 -78.10 184 -77.28 0.0002
2024-08-14 2024-06-30 13F BACKBLAZE COM CL A 05637B105 131,530 -114,051 -46.44 810 -67.75 0.0008
2024-05-15 2024-03-31 13F BACKBLAZE COM CL A 05637B105 245,581 190,788 348.20 2,512 505.30 0.0022
2024-02-14 2023-12-31 13F BACKBLAZE COM CL A 05637B105 54,793 54,793 416 0.0004
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.