PHATHOM PHARMACEUTICALS INC PHAT
COM · Common Stock · CUSIP 71722W107 · ISIN US71722W1071
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersFlorham Park, NJ
- 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. Holder counts are more reliable. Shares outstanding: 56.8m as of 2023-08-08, 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 ≈ $14.32. Options: 7 managers hold calls ($6.2m notional), 5 hold puts ($637.8k).
Trends to Q2 2023
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 94 |
| Q4 2022 | 87 |
| Q1 2023 | 85 |
| Q2 2023 | 104 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 38 | 41 |
| Q1 2023 | 49 | 35 |
| Q2 2023 | 69 | 29 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2022 | $1.9m | $3.0k | 0.00 |
| Q4 2022 | $133.0k | $123.8k | 0.93 |
| Q1 2023 | $1.8m | $15.6k | 0.01 |
| Q2 2023 | $6.2m | $637.8k | 0.10 |
Biggest buyers
| Frazier Life Sciences Management, L.P. | Added | +1.7m |
| NEA Management Company, LLC | New | +1.3m |
| Medicxi Ventures Management (Jersey) Ltd | Added | +1.3m |
| Invesco Ltd. | Added | +1.2m |
| KENNEDY CAPITAL MANAGEMENT LLC | New | +1.0m |
| Decheng Capital Management III (Cayman), LLC | New | +850.0k |
| EcoR1 Capital, LLC | New | +700.0k |
| Woodline Partners LP | New | +673.7k |
| DEERFIELD MANAGEMENT COMPANY, L.P. | New | +656.0k |
| VANGUARD GROUP INC | Added | +564.8k |
Biggest sellers
| Opaleye Management Inc. | Sold out | -496.0k |
| BANK OF AMERICA CORP /DE/ | Reduced | -197.4k |
| CITADEL ADVISORS LLC | Reduced | -171.6k |
| Avidity Partners Management LP | Reduced | -98.9k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | -83.0k |
| Candriam S.C.A. | Sold out | -63.8k |
| 683 Capital Management, LLC | Reduced | -38.0k |
| MARSHALL WACE, LLP | Sold out | -37.1k |
| Atom Investors LP | Reduced | -33.3k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -29.9k |
Biggest calls
| GROUP ONE TRADING LLC | Added | $2.5m176.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $2.2m152.4k shares |
| CITADEL ADVISORS LLC | Reduced | $558.5k39.0k shares |
| SIMPLEX TRADING, LLC | Added | $501.0k35.0k shares |
| JANE STREET GROUP, LLC | New | $411.0k28.7k shares |
| Cutler Group LLC / CA | Unchanged | $6.0k2.0k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $486.9k34.0k shares |
| CITADEL ADVISORS LLC | Added | $75.9k5.3k shares |
| SIMPLEX TRADING, LLC | Added | $55.0k3.9k shares |
| GROUP ONE TRADING LLC | New | $20.0k1.4k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 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 |
|---|---|
Frazier Life Sciences Public Fund, L.P.
13D · may seek influence
no change · filed 2025-11-04
Stated purposeItem 4 is hereby amended to remove references to "FLSPOF" and the "FLSPOF Shares" from the first paragraph. Full filing |
8.6% |
| BlackRock, Inc. 13G · institution +0.9 pts · filed 2026-07-29 | 5.5% |
Fell to 5% or below in the last year: MILLENNIUM MANAGEMENT LLC (4.2%, 2026-07-20)
Insider purchases and sales in Q2 2023
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.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2021 | 0 | — | 0 | — | — |
| Q4 2021 | 0 | — | 1 | $586.3k | — |
| Q1 2022 | 0 | — | 0 | — | — |
| Q2 2022 | 4 | $415.1k | 0 | — | — |
| Q3 2022 | 0 | — | 0 | — | — |
| Q4 2022 | 0 | — | 2 | $35.4k | — |
| Q1 2023 | 1 | $73.7k | 2 | $77.3k | — |
| Q2 2023 | 3 | $191.2k | 1 | $74.5k | $74.5k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2023-06-02 | Henderson Molly CFO and CBO | Sold plan | $22.4k2.0k shares |
| 2023-05-22 | Henderson Molly CFO and CBO | Sold plan | $27.2k2.1k shares |
| 2023-04-11 | Nabulsi Azmi Chief Operating Officer | Bought | $82.6k10.0k shares |
| 2023-04-10 | Parikh Asit Director | Bought | $7.5k1.0k shares |
| 2023-04-06 | Curran Terrie President and Chief Executive, director | Bought | $101.0k12.9k shares |
| 2023-04-06 | Henderson Molly CFO and CBO | Sold plan | $25.0k3.4k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2023
| Manager | Shares | Change |
|---|---|---|
| Frazier Life Sciences Management, L.P. 8.65% of their portfolio | 10.1m $144.8m | Added +1.7m |
| Medicxi Ventures Management (Jersey) Ltd 15.09% of their portfolio | 3.8m $53.9m | Added +1.3m |
| Carlyle Group Inc. 1.78% of their portfolio | 3.5m $50.1m | Added +561.7k |
| Invesco Ltd. 0.01% of their portfolio | 3.3m $47.7m | Added +1.2m |
| BlackRock Inc. 0.00% of their portfolio | 2.0m $28.7m | Added +369.7k |
| Avidity Partners Management LP 0.98% of their portfolio | 1.9m $27.9m | Reduced -98.9k |
| Ensign Peak Advisors, Inc 0.05% of their portfolio | 1.8m $25.2m | Reduced -4.1k |
| VANGUARD GROUP INC 0.00% of their portfolio | 1.7m $25.0m | Added +564.8k |
| 683 Capital Management, LLC 1.79% of their portfolio | 1.3m $18.4m | Reduced -38.0k |
| NEA Management Company, LLC 1.40% of their portfolio | 1.3m $18.3m | New |
| GILDER GAGNON HOWE & CO LLC 0.21% of their portfolio | 1.1m $15.2m | Added +506.8k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.35% of their portfolio | 1.0m $15.0m | New |
| Decheng Capital Management III (Cayman), LLC 3.82% of their portfolio | 850.0k $12.2m | New |
| EcoR1 Capital, LLC 0.26% of their portfolio | 700.0k $10.0m | New |
| Newtyn Management, LLC 2.31% of their portfolio | 683.6k $9.8m | Added +1.6k |
| Woodline Partners LP 0.11% of their portfolio | 673.7k $9.6m | New |
| DEERFIELD MANAGEMENT COMPANY, L.P. 0.20% of their portfolio | 656.0k $9.4m | New |
| GW&K Investment Management, LLC 0.08% of their portfolio | 592.4k $8.5m | Reduced -6.5k |
| STATE STREET CORP 0.00% of their portfolio | 529.8k $7.6m | Added +66.1k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 490.1k $7.0m | Added +41.5k |
| StepStone Group LP 1.12% of their portfolio | 422.1k $6.0m | Unchanged |
| MPM BIOIMPACT LLC 0.81% of their portfolio | 282.3k $4.0m | Added +69.7k |
| TANG CAPITAL MANAGEMENT LLC 0.53% of their portfolio | 250.0k $3.6m | New |
| Simplify Asset Management Inc. 0.62% of their portfolio | 237.9k $3.4m | Unchanged |
| NORTHERN TRUST CORP 0.00% of their portfolio | 217.2k $3.1m | Added +4.3k |
| Altium Capital Management LLC 2.32% of their portfolio | 207.4k $3.0m | New |
| SILVERARC CAPITAL MANAGEMENT, LLC 0.97% of their portfolio | 200.0k $2.9m | Unchanged |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 181.6k $2.6m | Added +73.3k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 178.9k $2.6m | Added +7.3k |
| FEDERATED HERMES, INC. 0.01% of their portfolio | 164.0k $2.3m | New |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 154.7k $2.2m | Added +106.0k |
| Ghost Tree Capital, LLC 0.80% of their portfolio | 154.2k $2.2m | New |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) 0.04% of their portfolio | 140.3k $2.0m | Added +40.2k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 134.0k $1.9m | Added +409 |
| AlphaCentric Advisors LLC 1.03% of their portfolio | 130.0k $1.9m | New |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 113.7k $1.6m | New |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 98.0k $1.4m | New |
| STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio | 86.3k $1.2m | Reduced -8.9k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 78.6k $1.1m | Added +1.2k |
| MORGAN STANLEY 0.00% of their portfolio | 72.4k $1.0m | Reduced -21.3k |
| Swiss National Bank 0.00% of their portfolio | 71.5k $1.0m | Added +31.1k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.01% of their portfolio | 70.8k $1.0m | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 63.4k $908.0k | Reduced -83.0k |
| Penn Mutual Asset Management 0.81% of their portfolio | 62.8k $899.3k | Unchanged |
| MOORE CAPITAL MANAGEMENT, LP 0.02% of their portfolio | 60.0k $859.2k | New |
| Hennion & Walsh Asset Management, Inc. 0.05% of their portfolio | 58.7k $840.0k | Added +616 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 56.1k $803.1k | Reduced -197.4k |
| GSA CAPITAL PARTNERS LLP 0.08% of their portfolio | 53.9k $772.0k | Added +33.7k |
| Atom Investors LP 0.29% of their portfolio | 53.3k $763.1k | Reduced -33.3k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 50.2k $718.9k | Added +17.4k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 41.5k $594.3k | Added +12.4k |
| CREDIT SUISSE AG/ 0.00% of their portfolio | 39.5k $565.1k | Added +22.8k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 37.7k $539.9k | Added +10.4k |
| FMR LLC 0.00% of their portfolio | 37.3k $534.5k | Added +35.8k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 37.1k $530.9k | Added +11.5k |
| Legal & General Group Plc 0.00% of their portfolio | 32.3k $462.3k | Added +28.4k |
| INSPIRION WEALTH ADVISORS, LLC 0.08% of their portfolio | 30.1k $431.5k | Added +6.9k |
| Occidental Asset Management, LLC 0.10% of their portfolio | 29.7k $424.9k | Unchanged |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 27.9k $400.1k | Reduced -29.9k |
| SIMPLEX TRADING, LLC 0.01% of their portfolio | 24.3k $348.0k | Reduced -5.1k |
| Creative Planning 0.00% of their portfolio | 20.5k $293.2k | Added +475 |
| Allworth Financial LP 0.00% of their portfolio | 19.6k $280.4k | Unchanged |
| Trexquant Investment LP 0.01% of their portfolio | 18.3k $262.1k | New |
| Ergoteles LLC 0.01% of their portfolio | 18.3k $262.1k | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 16.9k $242.2k | Reduced -171.6k |
| Vestcor Inc 0.01% of their portfolio | 16.9k $242.0k | New |
| UBS Group AG 0.00% of their portfolio | 16.8k $240.7k | New |
| Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio | 13.4k $192.5k | Added +210 |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 13.4k $193.0k | Reduced -1.6k |
| Stratos Wealth Advisors, LLC 0.01% of their portfolio | 12.5k $179.0k | Unchanged |
| MetLife Investment Management, LLC 0.00% of their portfolio | 12.3k $176.2k | Unchanged |
| AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio | 11.8k $169.6k | Added +6 |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 11.2k $160.4k | Reduced -2.1k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 11.1k $159.4k | Reduced -5.1k |
| BARCLAYS PLC 0.00% of their portfolio | 10.8k $154.8k | Reduced -1.7k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 10.5k $151.0k | New |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 10.4k $149.2k | New |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 10.0k $143.8k | New |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 10.0k $143.0k | New |
| STALEY CAPITAL ADVISERS INC 0.01% of their portfolio | 10.0k $143.2k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 9.6k $137.4k | Added +4.9k |
| CITIGROUP INC 0.00% of their portfolio | 9.1k $130.1k | Added +8.1k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 9.0k $128.6k | New |
| VIRTUS ADVISERS, LLC 0.07% of their portfolio | 8.5k $121.9k | New |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 5.7k $81.1k | Reduced -8.9k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 4.3k $59.4k | Added +4.1k |
| AMALGAMATED BANK 0.00% of their portfolio | 2.6k $37.0k | Reduced -659 |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 2.5k $36.0k | Added +617 |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 1.8k $25.6k | Reduced -353 |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 1.6k $22.7k | Unchanged |
| Metropolitan Life Insurance Co/NY 0.00% of their portfolio | 1.4k $19.7k | Unchanged |
| Cutler Group LLC / CA 0.00% of their portfolio | 1.2k $17.0k | Added +100 |
| HUNTINGTON NATIONAL BANK 0.00% of their portfolio | 1.1k $15.3k | Added +104 |
| CANADA LIFE ASSURANCE Co 0.00% of their portfolio | 850 $12.0k | Unchanged |
| China Universal Asset Management Co., Ltd. 0.00% of their portfolio | 717 $10.3k | Added +153 |
| Tradition Wealth Management, LLC 0.00% of their portfolio | 500 $7.0k | Added +100 |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 477 $6.8k | Reduced -1.2k |
| Daiwa Securities Group Inc. 0.00% of their portfolio | 167 $2.0k | Unchanged |
| BerganKDV Wealth Management, LLC 0.00% of their portfolio | 140 $2.0k | New |
| Lindbrook Capital, LLC 0.00% of their portfolio | 132 $1.9k | New |