BLZE · Backblaze, Inc. · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 172 13F filersWho Holds BLZE
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 168 filers, like-for-like change +21.8%; actively managed books +20.1%; index-like books +25.0%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 52.9% | 92 | +9.9% |
| Exempt adviser | 3.2% | 3 | +117.7% |
| Adviser | 3.7% | 5 | +239.4% |
| Bank | 7.3% | 13 | +10.5% |
| Benefit plan | 0.1% | 3 | +950.5% |
| Non-US | 1.0% | 5 | -6.5% |
| Holding company | 16.8% | 5 | +41.4% |
| Broker-dealer | 0.0% | 0 | -100.0% |
| Insurer | 0.0% | 0 | — |
| Unknown | 15.0% | 42 | +25.8% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 36.3% | 18 | +25.0% |
| Systematic-like | 10.6% | 24 | -5.6% |
| Concentrated | 2.1% | 18 | -51.7% |
| Diversified active | 51.0% | 108 | +36.1% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 38.6% | 83 | +35.1% |
| Medium turnover | 33.6% | 37 | +34.9% |
| High turnover | 12.8% | 36 | +6.6% |
| Unknown | 15.0% | 12 | -10.6% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 15.9% | 23 | -10.0% |
| Medium horizon | 20.2% | 26 | +69.6% |
| Long horizon | 46.4% | 99 | +2.8% |
| Unknown | 17.4% | 20 | +136.0% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 8.2% | 29 | -37.9% |
| $1B to $10B | 11.6% | 43 | +19.3% |
| $10B to $100B | 27.3% | 46 | +67.3% |
| $100B or more | 52.9% | 50 | +23.5% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 4.3% | 41 | +90.2% |
| Pooled investment vehicles | 16.8% | 20 | -35.3% |
| Registered funds and BDCs | 15.8% | 9 | +8.4% |
| Pension and profit sharing plans | 0.0% | 1 | +55.0% |
| Insurance companies | 0.1% | 3 | +51.2% |
| Governments and sovereign funds | 1.3% | 6 | +479.2% |
| Other investment advisers | 0.1% | 2 | +11582.1% |
| Diversified | 14.4% | 10 | +191.6% |
| Charitable organizations | 0.0% | 0 | — |
| Unknown | 47.1% | 76 | +38.9% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 35.0% | 32 | +7.8% |
| Private equity funds | 0.5% | 9 | +142.1% |
| Venture capital funds | 0.0% | 1 | +75.4% |
| Real estate funds | 0.1% | 5 | +1725.8% |
| Other private funds | 4.3% | 13 | +68.3% |
| Mixed private funds | 0.2% | 2 | +102.0% |
| Private funds, type not stated | 0.1% | 1 | -36.2% |
| No private funds | 16.0% | 32 | +12.7% |
| Securitized asset funds | 0.0% | 0 | — |
| Unknown | 43.9% | 73 | +35.3% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 90.9% | 146 | +20.8% |
| Outside the US | 9.1% | 22 | +34.2% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 2 holders with no observed 2026-03-31 13F and 2 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
168 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 84.7% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies BLZE's active holders also own, quarter ended Jun 30, 2026Shareholder Targets
13F filers that own its peers but not BLZE, quarter ended Jun 30, 2026Found through its holder-overlap peers: WYFI, OPRX, OOMA, ALLT, MGNI, AEHR, UMAC, BKSY, KOPN, CYRX, PENG, SEZL, GHM, AXGN, ICHR, LINC, UTI, OUST, ONDS, MXL. 1,171 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | JANE STREET GROUP, LLC Unknown, Diversified active | $466,333,016 15 held | MXL, AEHR, MGNI |
| 2 | WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active | $434,983,469 10 held | ICHR, MGNI, AXGN |
| 3 | T. Rowe Price Investment Management, Inc. Adviser, Diversified active | $413,907,892 8 held | MXL, PENG, SEZL |
| 4 | Divisadero Street Capital Management, LP Registered adviser, Diversified active | $321,107,245 4 held | SEZL, ICHR, AXGN |
| 5 | ROYCE & ASSOCIATES LP Registered adviser, Diversified active | $290,184,480 11 held | ICHR, GHM, UTI |
| 6 | BARROW HANLEY MEWHINNEY & STRAUSS LLC Registered adviser, Diversified active | $283,345,498 3 held | PENG, ICHR, MXL |
| 7 | Hood River Capital Management LLC Registered adviser, Diversified active | $245,604,747 4 held | ONDS, UTI, AXGN |
| 8 | Capital International Investors Adviser, Diversified active | $229,454,958 1 held | ICHR |
| 9 | Boston Partners Registered adviser, Diversified active | $223,103,881 3 held | PENG, MGNI, OOMA |
| 10 | CITADEL ADVISORS LLC Registered adviser, Systematic-like | $213,451,538 15 held | AXGN, AEHR, ONDS |
Fund Ownership of BLZE by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 11.58% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 3.03% | 1,875,332 |
| Index ETFs | 8.55% | 5,295,116 |
| Active ETFs | 0.81% | 499,423 |
| Active funds | 2.72% | 1,680,825 |
| Unclassified | 0.01% | 7,144 |
| All registered funds | 15.12% | 9,357,840 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $74,898,577 | 12.88% | 4,722,483 | Shares | 2026-08-07 | |
| Large Driehaus Capital Management LLC Registered adviser | $42,632,377 | 7.33% | 2,688,044 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $39,882,174 | 6.86% | 2,514,639 | Shares | 2026-08-13 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $28,332,335 | 4.87% | 1,786,402 | Shares | 2026-08-13 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $24,188,037 | 4.16% | 1,525,097 | Shares | 2026-08-12 | |
| Mid AWM Investment Company, Inc. Registered adviser | $22,206,632 | 3.82% | 1,400,166 | Shares | 2026-08-14 | |
| Small Pillsbury Lake Capital LLC Registered adviser | $21,249,814 | 3.65% | 1,339,837 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $19,301,588 | 3.32% | 1,216,998 | Shares | 2026-09-22 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $18,346,086 | 3.16% | 1,156,752 | Shares | 2026-08-13 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $16,682,289 | 2.87% | 1,051,847 | Shares | 2026-08-14 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $12,151,932 | 2.09% | 766,200 | Shares | 2026-08-14 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $12,094,962 | 2.08% | 762,608 | Shares | 2026-08-13 | |
| Mid NEXT CENTURY GROWTH INVESTORS LLC Adviser | $10,903,718 | 1.88% | 687,498 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $9,970,166 | 1.71% | 628,636 | Shares | 2026-08-11 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $9,734,614 | 1.67% | 613,784 | Shares | 2026-08-13 | |
| Mega Nuveen, LLC | $9,164,556 | 1.58% | 577,841 | Shares | 2026-08-11 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $8,724,110 | 1.50% | 550,070 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $7,857,599 | 1.35% | 495,435 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $7,669,863 | 1.32% | 483,598 | Shares | 2026-08-13 | |
| Mid Jump Financial, LLC | $7,439,926 | 1.28% | 469,100 | Shares | 2026-08-13 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $7,427,713 | 1.28% | 468,330 | Shares | 2026-08-14 | |
| Small Halter Ferguson Financial Inc. Registered adviser | $7,259,962 | 1.25% | 457,753 | Shares | 2026-08-03 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $6,718,993 | 1.16% | 423,644 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY Holding company | $6,469,465 | 1.11% | 407,911 | Shares | 2026-08-13 | |
| Mega FMR LLC Holding company | $5,622,258 | 0.97% | 354,493 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $5,341,648 | 0.92% | 336,800 | Call | 2026-08-14 | |
| Small P.A.W. CAPITAL CORP | $5,075,200 | 0.87% | 320,000 | Shares | 2026-07-28 | |
| Mid PRELUDE CAPITAL MANAGEMENT, LLC Registered adviser | $5,025,256 | 0.86% | 316,851 | Shares | 2026-08-14 | |
| Large MARSHALL WACE, LLP Exempt adviser | $5,017,167 | 0.86% | 316,341 | Shares | 2026-08-13 | |
| Small PERKINS CAPITAL MANAGEMENT INC Registered adviser | $4,896,378 | 0.84% | 308,725 | Shares | 2026-07-24 | |
| Large LAZARD ASSET MANAGEMENT LLC Adviser | $4,712,608 | 0.81% | 297,138 | Shares | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $3,960,019 | 0.68% | 249,686 | Shares | 2026-08-14 | |
| Large TUDOR INVESTMENT CORP ET AL Registered adviser | $3,884,161 | 0.67% | 244,903 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $3,859,387 | 0.66% | 243,341 | Shares | 2026-08-12 | |
| Mid BOOTHBAY FUND MANAGEMENT, LLC Registered adviser | $3,844,241 | 0.66% | 242,386 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $3,589,118 | 0.62% | 226,300 | Call | 2026-08-14 | |
| Large Trexquant Investment LP Registered adviser | $3,585,866 | 0.62% | 226,095 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $3,421,335 | 0.59% | 215,721 | Shares | 2026-08-13 | |
| Mega NORGES BANK Non-US | $3,416,244 | 0.59% | 215,400 | Shares | 2026-08-12 | |
| Large HRT FINANCIAL LP | $3,094,603 | 0.53% | 195,120 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $3,073,856 | 0.53% | 193,812 | Shares | 2026-08-06 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $2,691,727 | 0.46% | 169,718 | Shares | 2026-08-14 | |
| Small Kultura Capital Management LP Registered adviser | $2,650,206 | 0.46% | 167,100 | Call | 2026-08-14 | |
| Mid Regal Partners Ltd | $2,586,385 | 0.44% | 163,076 | Shares | 2026-08-14 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $2,488,862 | 0.43% | 156,927 | Shares | 2026-08-14 | |
| Large Squarepoint Ops LLC Registered adviser | $2,464,913 | 0.42% | 155,417 | Shares | 2026-08-14 | |
| Mega Jupiter Topco LLC | $2,395,462 | 0.41% | 151,038 | Shares | 2026-08-14 | |
| Large Cerity Partners LLC Registered adviser | $2,342,394 | 0.40% | 147,692 | Shares | 2026-08-14 | |
| Large IEQ CAPITAL, LLC Registered adviser | $2,100,117 | 0.36% | 132,416 | Shares | 2026-08-11 | |
| Mega FRANKLIN RESOURCES INC Adviser | $2,043,591 | 0.35% | 128,852 | Shares | 2026-08-13 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $1,954,158 | 0.34% | 123,213 | Shares | 2026-08-14 | |
| Small Scientech Research LLC | $1,783,790 | 0.31% | 112,471 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $1,625,808 | 0.28% | 102,510 | Shares | 2026-08-14 | |
| Large Balyasny Asset Management L.P. Registered adviser | $1,489,523 | 0.26% | 93,917 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $1,446,432 | 0.25% | 91,200 | Call | 2026-09-02 | |
| Mid Informed Momentum Co LLC Registered adviser | $1,419,422 | 0.24% | 89,497 | Shares | 2026-08-13 | |
| Small Vanguard Capital Wealth Advisors Registered adviser | $1,405,995 | 0.24% | 100,500 | Shares | 2026-10-16 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1,374,126 | 0.24% | 86,641 | Shares | 2026-08-14 | |
| Mid CastleKnight Management LP Registered adviser | $1,365,546 | 0.23% | 86,100 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $1,273,256 | 0.22% | 80,281 | Shares | 2026-08-14 | |
| Mega SEI INVESTMENTS CO | $1,207,691 | 0.21% | 76,147 | Shares | 2026-08-14 | |
| Small SCALAR GAUGE MANAGEMENT, LLC | $1,189,500 | 0.20% | 75,000 | Shares | 2026-08-14 | |
| Large Mariner, LLC Registered adviser | $1,170,134 | 0.20% | 73,779 | Shares | 2026-08-13 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $1,137,066 | 0.20% | 71,694 | Shares | 2026-08-12 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC Registered adviser | $1,107,028 | 0.19% | 69,800 | Shares | 2026-08-14 | |
| Mid SIMPLEX TRADING, LLC | $1,103,713 | 0.19% | 69,591 | Shares | 2026-08-12 | |
| Large LOS ANGELES CAPITAL MANAGEMENT LLC Registered adviser | $995,754 | 0.17% | 62,784 | Shares | 2026-08-13 | |
| Large Cambridge Investment Research Advisors, Inc. | $952,202 | 0.16% | 60,038 | Shares | 2026-07-30 | |
| Mega DEUTSCHE BANK AG\ Non-US | $924,732 | 0.16% | 58,306 | Shares | 2026-08-07 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $915,105 | 0.16% | 57,699 | Shares | 2026-08-14 | |
| Large Cetera Investment Advisers Registered adviser | $908,714 | 0.16% | 57,296 | Shares | 2026-08-12 | |
| Large ZACKS INVESTMENT MANAGEMENT Registered adviser | $894,313 | 0.15% | 56,388 | Shares | 2026-08-13 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $856,440 | 0.15% | 54,000 | Put | 2026-09-02 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $853,268 | 0.15% | 53,800 | Shares | 2026-08-14 | |
| Large Brevan Howard Capital Management LP Exempt adviser | $816,552 | 0.14% | 51,485 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $795,379 | 0.14% | 50,150 | Shares | 2026-08-14 | |
| Mega BARCLAYS PLC Bank | $793,062 | 0.14% | 50,004 | Shares | 2026-08-14 | |
| Small NANO CAP NEW MILLENNIUM GROWTH FUND L P | $793,000 | 0.14% | 50,000 | Shares | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $792,095 | 0.14% | 49,943 | Shares | 2026-08-13 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $774,031 | 0.13% | 48,804 | Shares | 2026-08-14 | |
| Mid PDT Partners, LLC Registered adviser | $773,650 | 0.13% | 48,780 | Shares | 2026-08-14 | |
| Small Penbrook Management LLC Registered adviser | $726,081 | 0.12% | 51,900 | Shares | 2026-10-16 | |
| Small Integrated Quantitative Investments LLC Registered adviser | $701,202 | 0.12% | 44,212 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $699,426 | 0.12% | 44,100 | Put | 2026-08-14 | |
| Large Quadrature Capital Ltd | $686,849 | 0.12% | 43,307 | Shares | 2026-08-07 | |
| Large Walleye Trading LLC | $668,086 | 0.11% | 42,124 | Shares | 2026-08-03 | |
| Mid Y-Intercept (Hong Kong) Ltd Exempt adviser | $655,501 | 0.11% | 46,855 | Shares | 2026-10-16 | |
| Mega JANE STREET GROUP, LLC | $623,298 | 0.11% | 39,300 | Put | 2026-08-14 | |
| Mid BAILARD, INC. Registered adviser | $579,186 | 0.10% | 41,400 | Shares | 2026-10-13 | |
| Mid Quantbot Technologies LP Registered adviser | $577,811 | 0.10% | 36,432 | Shares | 2026-08-12 | |
| Mega CANADA PENSION PLAN INVESTMENT BOARD Non-US | $574,132 | 0.10% | 36,200 | Shares | 2026-08-14 | |
| Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $553,934 | 0.10% | 39,595 | Shares | 2026-10-13 | |
| Large MetLife Investment Management, LLC Registered adviser | $539,890 | 0.09% | 34,041 | Shares | 2026-08-14 | |
| Mid Cornerstone Investment Partners, LLC Registered adviser | $518,257 | 0.09% | 32,677 | Shares | 2026-08-07 | |
| Large FULLER & THALER ASSET MANAGEMENT, INC. Registered adviser | $505,410 | 0.09% | 31,867 | Shares | 2026-08-12 | |
| Mega Invesco Ltd. Adviser | $504,013 | 0.09% | 31,779 | Shares | 2026-08-14 | |
| Mid Foundations Investment Advisors, LLC Registered adviser | $475,800 | 0.08% | 30,000 | Shares | 2026-08-14 | |
| Mega AMERICAN CENTURY COMPANIES INC | $474,198 | 0.08% | 29,899 | Shares | 2026-08-12 | |
| Large MERCER GLOBAL ADVISORS INC /ADV Registered adviser | $446,728 | 0.08% | 28,167 | Shares | 2026-08-19 | |
| Mega CITIGROUP INC Bank | $442,208 | 0.08% | 27,882 | Shares | 2026-08-03 |
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