BLACK DIAMOND THERAPEUTICS I BDTX
COM · Common Stock · CUSIP 09203E105 · ISIN US09203E1055
- SectorHealth care
- IndustryBiological Products, (No Diagnostic Substances)
- HeadquartersCambridge, MA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($464.3k this quarter). Holder counts are more reliable. Shares outstanding: 57.5m as of 2026-07-30, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $1.85. Options: 6 managers hold calls ($779.4k notional), 4 hold puts ($163.0k).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 69 |
| Q4 2022 | 60 |
| Q1 2023 | 51 |
| Q2 2023 | 75 |
| Q3 2023 | 74 |
| Q4 2023 | 77 |
| Q1 2024 | 89 |
| Q2 2024 | 92 |
| Q3 2024 | 97 |
| Q4 2024 | 89 |
| Q1 2025 | 86 |
| Q2 2025 | 95 |
| Q3 2025 | 91 |
| Q4 2025 | 104 |
| Q1 2026 | 105 |
| Q2 2026 | 96 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 57 | 38 |
| Q4 2024 | 48 | 45 |
| Q1 2025 | 32 | 41 |
| Q2 2025 | 61 | 44 |
| Q3 2025 | 49 | 47 |
| Q4 2025 | 62 | 36 |
| Q1 2026 | 50 | 55 |
| Q2 2026 | 59 | 56 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $449.7k | $17.3k | 0.04 |
| Q4 2025 | $657.1k | $234.7k | 0.36 |
| Q1 2026 | $229.2k | $221.1k | 0.96 |
| Q2 2026 | $779.4k | $163.0k | 0.21 |
Biggest buyers
| BlackRock, Inc. | Added | +2.8m |
| Defilade Capital Management, L.P. | New | +1.7m |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +681.6k |
| AWM Investment Company, Inc. | Added | +475.0k |
| RENAISSANCE TECHNOLOGIES LLC | Added | +318.6k |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Added | +313.9k |
| STATE STREET CORP | Added | +311.5k |
| BANK OF AMERICA CORP /DE/ | Added | +299.4k |
| PANAGORA ASSET MANAGEMENT INC | New | +295.2k |
| VANGUARD CAPITAL MANAGEMENT LLC | Added | +274.8k |
Biggest sellers
| T. Rowe Price Investment Management, Inc. | Reduced | -6.5m |
| MACKENZIE FINANCIAL CORP | Sold out | -844.8k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | -569.0k |
| Man Group plc | Sold out | -559.7k |
| WINTON GROUP Ltd | Sold out | -538.3k |
| CITADEL ADVISORS LLC | Sold out | -502.7k |
| GOLDMAN SACHS GROUP INC | Reduced | -395.6k |
| GLOBEFLEX CAPITAL L P | Sold out | -305.3k |
| UBS Group AG | Reduced | -299.5k |
| Round Rock Advisors LLC | Sold out | -274.4k |
Biggest calls
| TORONTO DOMINION BANK | New | $395.9k214.0k shares |
| CITADEL ADVISORS LLC | Added | $166.5k90.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $97.9k52.9k shares |
| SIMPLEX TRADING, LLC | Added | $69.7k37.7k shares |
| JANE STREET GROUP, LLC | Reduced | $25.2k13.6k shares |
| GROUP ONE TRADING LLC | Reduced | $24.2k13.1k shares |
Biggest puts
| CITADEL ADVISORS LLC | Reduced | $112.8k61.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $48.8k26.4k shares |
| GROUP ONE TRADING LLC | New | $925500 shares |
| SIMPLEX TRADING, LLC | Reduced | $370200 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| T. Rowe Price Investment Management, Inc. 13G · institution filed 2026-07-08 | 7.0% |
| BlackRock, Inc. 13G · institution +2.2 pts · filed 2026-07-27 | 6.7% |
Fell to 5% or below in the last year: Vestal Point Capital, LP (1.5%, 2026-02-17)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| NEA Management Company, LLC 0.52% of their portfolio | 4.4m $8.2m | Unchanged |
| T. Rowe Price Investment Management, Inc. 0.00% of their portfolio | 4.0m $7.5m | Reduced -6.5m |
| BlackRock, Inc. 0.00% of their portfolio | 3.9m $7.2m | Added +2.8m |
| ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio | 2.3m $4.3m | Unchanged |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 2.1m $3.9m | Added +274.8k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 2.0m $3.6m | Added +318.6k |
| Defilade Capital Management, L.P. 0.41% of their portfolio | 1.7m $3.1m | New |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 1.4m $2.5m | Added +63.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.2m $2.3m | Added +681.6k |
| Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio | 1.1m $2.0m | Added +34.5k |
| AWM Investment Company, Inc. 0.16% of their portfolio | 1.0m $1.9m | Added +475.0k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 896.6k $1.7m | Added +60.3k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.03% of their portfolio | 791.4k $1.5m | Added +68.0k |
| FMR LLC 0.00% of their portfolio | 643.7k $1.2m | Added +19.8k |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 542.2k $1.0m | Added +31.4k |
| STATE STREET CORP 0.00% of their portfolio | 525.0k $971.3k | Added +311.5k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 413.5k $765.0k | Added +299.4k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 407.1k $753.1k | Added +313.9k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 365.4k $676.0k | Reduced -99.3k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 318.8k $589.7k | Added +129.6k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 309.9k $573.2k | Added +49.9k |
| PANAGORA ASSET MANAGEMENT INC 0.00% of their portfolio | 295.2k $546.1k | New |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 289.7k $536.0k | Added +194.9k |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.00% of their portfolio | 288.9k $534.4k | Added +106.6k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 288.8k $534.2k | Reduced -395.6k |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 281.2k $520.3k | Added +2.6k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio | 265.6k $491.3k | Reduced -569.0k |
| UBS Group AG 0.00% of their portfolio | 265.3k $490.8k | Reduced -299.5k |
| Empowered Funds, LLC 0.00% of their portfolio | 248.1k $459.0k | Added +18.0k |
| MORGAN STANLEY 0.00% of their portfolio | 231.2k $427.7k | Added +142.6k |
| GSA CAPITAL PARTNERS LLP 0.03% of their portfolio | 220.9k $409.0k | Added +51.1k |
| RITHOLTZ WEALTH MANAGEMENT 0.00% of their portfolio | 178.5k $330.2k | Added +13.1k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 157.3k $291.1k | Reduced -206.6k |
| Invesco Ltd. 0.00% of their portfolio | 131.7k $243.6k | Added +24.3k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 107.7k $199.2k | Added +93.2k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.00% of their portfolio | 103.6k $191.7k | Reduced -107.8k |
| RB Capital Management, LLC 0.04% of their portfolio | 100.0k $185.0k | Added +65.0k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 81.3k $150.4k | Reduced -9.7k |
| Quadrature Capital Ltd 0.00% of their portfolio | 76.7k $141.9k | Added +39.2k |
| Nuveen, LLC 0.00% of their portfolio | 64.8k $119.9k | New |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 62.2k $115.1k | Added +48.1k |
| Graham Capital Management, L.P. 0.00% of their portfolio | 54.2k $100.3k | Reduced -116.7k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 46.0k $85.2k | New |
| XTX Topco Ltd 0.00% of their portfolio | 44.3k $82.0k | Reduced -8.5k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 42.0k $77.7k | Reduced -1.3k |
| LPL Financial LLC 0.00% of their portfolio | 40.8k $75.5k | Reduced -2.0k |
| BARCLAYS PLC 0.00% of their portfolio | 40.1k $74.1k | Reduced -27.2k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 39.7k $73.4k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 39.6k $73.2k | New |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 39.3k $73.0k | New |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 36.8k $68.1k | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 35.0k $64.8k | Reduced -43.8k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 32.3k $68.9k | New |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 30.3k $56.1k | New |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 29.2k $51.2k | Added +24.6k |
| EFG International AG 0.00% of their portfolio | 27.0k $50.0k | New |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 26.4k $46.4k | Unchanged |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 24.1k $44.6k | New |
| CITIGROUP INC 0.00% of their portfolio | 23.1k $42.8k | Added +21.5k |
| Virtu Financial LLC 0.00% of their portfolio | 22.7k $42.0k | New |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 21.7k $40.2k | New |
| DIVERSIFIED TRUST CO 0.00% of their portfolio | 18.9k $34.9k | New |
| DLK Investment Management, LLC 0.03% of their portfolio | 16.2k $75.6k | Reduced -2.0k |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 15.7k $29.0k | Unchanged |
| Beacon Capital Management, LLC 0.00% of their portfolio | 15.6k $28.9k | Unchanged |
| Spark Investment Management LLC 0.06% of their portfolio | 15.5k $28.7k | New |
| J. Safra Sarasin Holding AG 0.00% of their portfolio | 15.5k $28.7k | New |
| Brookstone Capital Management 0.00% of their portfolio | 13.5k $24.9k | Reduced -806 |
| INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 11.1k $20.5k | New |
| NEUBERGER BERMAN GROUP LLC 0.00% of their portfolio | 10.5k $19.4k | New |
| Kathmere Capital Management, LLC 0.00% of their portfolio | 10.2k $19.0k | Reduced -3.6k |
| Vontobel Holding Ltd. 0.00% of their portfolio | 10.0k $18.5k | New |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 9.9k $18.4k | Added +5.5k |
| China Universal Asset Management Co., Ltd. 0.00% of their portfolio | 9.1k $16.9k | Reduced -991 |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 8.0k $14.8k | Added +6.3k |
| Optiver Holding B.V. 0.00% of their portfolio | 7.5k $13.9k | New |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 5.0k $9.2k | Added +4.1k |
| Legal & General Group Plc 0.00% of their portfolio | 4.6k $8.4k | New |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 4.3k $7.9k | New |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 4.0k $7.4k | Added +3.8k |
| NewEdge Advisors, LLC 0.00% of their portfolio | 3.5k $6.5k | Reduced -2.6k |
| FEDERATED HERMES, INC. 0.00% of their portfolio | 3.3k $6.1k | Reduced -2.1k |
| Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio | 2.6k $4.7k | Reduced -409 |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 1.5k $3.0k | Added +801 |
| GF FUND MANAGEMENT CO. LTD. 0.00% of their portfolio | 1.2k $2.2k | Reduced -87 |
| Sterling Capital Management LLC 0.00% of their portfolio | 951 $1.8k | New |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 480 $888 | Reduced -377 |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 428 $732 | Unchanged |
| Rialto Wealth Management, LLC 0.00% of their portfolio | 286 $530 | New |
| Federation des caisses Desjardins du Quebec 0.00% of their portfolio | 280 $518 | Unchanged |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 275 $509 | Unchanged |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 200 $370 | Unchanged |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 141 $261 | Reduced -333 |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 103 $191 | Unchanged |
| TSFG, LLC 0.00% of their portfolio | 100 $0 | Unchanged |
| Arax Advisory Partners 0.00% of their portfolio | 9 $17 | Reduced -83 |