Who owns Backblaze (BLZE)
Which tracked institutional funds hold BLZE, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BLZE company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on BLZE is one-sided between 2026-Q1 and 2026-Q2: 88 added or opened and 8 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
BLZE’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes BLZE more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in BLZE divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 163 tracked filers holding BLZE, 118 increased or opened the position and 64 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in BLZE between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 20
- Driehaus Capital Management LLC$43M
- NEXT CENTURY GROWTH INVESTORS LLC$11M
- Halter Ferguson Financial Inc.$7M
- Trexquant Investment LP$4M
- NORGES BANK$3M
- Regal Partners Ltd$3M
Full exits 7
- ACADIAN ASSET MANAGEMENT LLC$6M
- Whetstone Capital Advisors, LLC$5M
- Point72 Asset Management, L.P.$2M
- CITADEL ADVISORS LLC$1M
- GSA CAPITAL PARTNERS LLP$659K
- JACOBS LEVY EQUITY MANAGEMENT, INC$602K
Largest adds
- BlackRock, Inc.$62M
- VANGUARD CAPITAL MANAGEMENT LLC$32M
- GEODE CAPITAL MANAGEMENT, LLC$20M
- AWM Investment Company, Inc.$17M
- Connor, Clark & Lunn Investment Management Ltd.$15M
- STATE STREET CORP$15M
Largest trims
- D. E. Shaw & Co., Inc.$1M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 4,722,483 | $75M | 14.3% | 2026-Q2 |
| Driehaus Capital Management LLC new | 2,688,044 | $43M | 8.1% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,514,639 | $40M | 7.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,525,097 | $24M | 4.6% | 2026-Q2 |
| AWM Investment Company, Inc. | 1,400,166 | $22M | 4.2% | 2026-Q2 |
| Pillsbury Lake Capital LLC trimmed | 1,339,837 | $21M | 4.1% | 2026-Q2 |
| STATE STREET CORP added | 1,216,998 | $19M | 3.7% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 1,156,752 | $18M | 3.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 1,051,847 | $17M | 3.2% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 766,200 | $12M | 2.3% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 762,608 | $12M | 2.3% | 2026-Q2 |
| NEXT CENTURY GROWTH INVESTORS LLC new | 687,498 | $11M | 2.1% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 628,636 | $10M | 1.9% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 613,784 | $10M | 1.9% | 2026-Q2 |
| Nuveen, LLC added | 577,841 | $9M | 1.7% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 550,070 | $9M | 1.7% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 495,435 | $8M | 1.5% | 2026-Q2 |
| NORTHERN TRUST CORP added | 483,598 | $8M | 1.5% | 2026-Q2 |
| Jump Financial, LLC added | 469,100 | $7M | 1.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 468,330 | $7M | 1.4% | 2026-Q2 |
| Halter Ferguson Financial Inc. new | 457,753 | $7M | 1.4% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 423,644 | $7M | 1.3% | 2026-Q2 |
| MORGAN STANLEY added | 407,911 | $6M | 1.2% | 2026-Q2 |
| FMR LLC added | 354,493 | $6M | 1.1% | 2026-Q2 |
| P.A.W. CAPITAL CORP trimmed | 320,000 | $5M | 1.0% | 2026-Q2 |
| PRELUDE CAPITAL MANAGEMENT, LLC trimmed | 316,851 | $5M | 1.0% | 2026-Q2 |
| MARSHALL WACE, LLP added | 316,341 | $5M | 1.0% | 2026-Q2 |
| PERKINS CAPITAL MANAGEMENT INC trimmed | 308,725 | $5M | 0.9% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC added | 297,138 | $5M | 0.9% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 249,686 | $4M | 0.8% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL added | 244,903 | $4M | 0.7% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 243,341 | $4M | 0.7% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 242,386 | $4M | 0.7% | 2026-Q2 |
| Trexquant Investment LP added | 226,095 | $4M | 0.7% | 2026-Q2 |
| UBS Group AG trimmed | 215,721 | $3M | 0.7% | 2026-Q2 |
| NORGES BANK added | 215,400 | $3M | 0.7% | 2026-Q2 |
| Bank of New York Mellon Corp added | 193,812 | $3M | 0.6% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 169,718 | $3M | 0.5% | 2026-Q2 |
| Regal Partners Ltd new | 163,076 | $3M | 0.5% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 156,927 | $2M | 0.5% | 2026-Q2 |
| Squarepoint Ops LLC added | 155,417 | $2M | 0.5% | 2026-Q2 |
| Jupiter Topco LLC new | 151,038 | $2M | 0.5% | 2026-Q2 |
| Cerity Partners LLC added | 147,692 | $2M | 0.4% | 2026-Q2 |
| IEQ CAPITAL, LLC added | 132,416 | $2M | 0.4% | 2026-Q2 |
| FRANKLIN RESOURCES INC new | 128,852 | $2M | 0.4% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 123,213 | $2M | 0.4% | 2026-Q2 |
| Scientech Research LLC new | 112,471 | $2M | 0.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 102,510 | $2M | 0.3% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. added | 93,917 | $1M | 0.3% | 2026-Q2 |
| Informed Momentum Co LLC trimmed | 89,497 | $1M | 0.3% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 86,641 | $1M | 0.3% | 2026-Q2 |
| CastleKnight Management LP trimmed | 86,100 | $1M | 0.3% | 2026-Q2 |
| XTX Topco Ltd trimmed | 80,281 | $1M | 0.2% | 2026-Q2 |
| SEI INVESTMENTS CO added | 76,147 | $1M | 0.2% | 2026-Q2 |
| SCALAR GAUGE MANAGEMENT, LLC trimmed | 75,000 | $1M | 0.2% | 2026-Q2 |
| Mariner, LLC added | 73,779 | $1M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 71,694 | $1M | 0.2% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 69,800 | $1M | 0.2% | 2026-Q2 |
| SIMPLEX TRADING, LLC added | 69,591 | $1M | 0.2% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC trimmed | 62,784 | $996K | 0.2% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 58,306 | $925K | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 57,699 | $915K | 0.2% | 2026-Q2 |
| Cetera Investment Advisers new | 57,296 | $909K | 0.2% | 2026-Q2 |
| ZACKS INVESTMENT MANAGEMENT added | 56,388 | $894K | 0.2% | 2026-Q2 |
| Penbrook Management LLC trimmed | 53,700 | $852K | 0.2% | 2026-Q2 |
| Brevan Howard Capital Management LP added | 51,485 | $817K | 0.2% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 50,150 | $795K | 0.2% | 2026-Q2 |
| BARCLAYS PLC trimmed | 50,004 | $793K | 0.2% | 2026-Q2 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P trimmed | 50,000 | $793K | 0.2% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 49,943 | $792K | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 48,804 | $775K | 0.1% | 2026-Q2 |
| PDT Partners, LLC | 48,780 | $774K | 0.1% | 2026-Q2 |
| Integrated Quantitative Investments LLC new | 44,212 | $701K | 0.1% | 2026-Q2 |
| Quadrature Capital Ltd added | 43,307 | $687K | 0.1% | 2026-Q2 |
| BAILARD, INC. added | 42,400 | $672K | 0.1% | 2026-Q2 |
| Walleye Trading LLC new | 42,124 | $668K | 0.1% | 2026-Q2 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC added | 36,718 | $646K | 0.1% | 2026-Q2 |
| Quantbot Technologies LP added | 36,432 | $578K | 0.1% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD trimmed | 36,200 | $574K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 34,041 | $540K | 0.1% | 2026-Q2 |
| Cornerstone Investment Partners, LLC added | 32,677 | $518K | 0.1% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. new | 31,867 | $505K | 0.1% | 2026-Q2 |
| Invesco Ltd. trimmed | 31,779 | $504K | 0.1% | 2026-Q2 |
| SLT Holdings LLC new | 30,000 | $476K | 0.1% | 2026-Q2 |
| Foundations Investment Advisors, LLC new | 30,000 | $476K | 0.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC new | 29,899 | $474K | 0.1% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV added | 28,167 | $447K | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 27,882 | $442K | 0.1% | 2026-Q2 |
| Creative Planning added | 27,758 | $440K | 0.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 27,015 | $428K | 0.1% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD new | 23,468 | $372K | 0.1% | 2026-Q2 |
| Arax Advisory Partners added | 23,097 | $366K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 22,697 | $360K | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 22,220 | $352K | 0.1% | 2026-Q2 |
| TRU INDEPENDENCE ASSET MANAGEMENT 2, LLC new | 21,950 | $348K | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 20,600 | $327K | 0.1% | 2026-Q2 |
| GLOBEFLEX CAPITAL L P added | 20,363 | $323K | 0.1% | 2026-Q2 |
| AXQ CAPITAL, LP added | 19,811 | $314K | 0.1% | 2026-Q2 |
| WINTON GROUP Ltd added | 18,600 | $295K | 0.1% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 17,322 | $275K | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.