EXAGEN INC XGN
COM · Common Stock · CUSIP 30068X103
Clinical laboratory company
- SectorHealth care
- IndustryServices-Medical Laboratories
- HeadquartersVista, CA
- Founded2002
- Websiteexagen.com
- 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 ($448.3k this quarter). Holder counts are more reliable. Shares outstanding: 22.0m as of 2025-07-24, 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 ≈ $6.97. Options: 3 managers hold calls ($55.9k notional), 3 hold puts ($16.6k).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 38 |
| Q4 2022 | 32 |
| Q1 2023 | 29 |
| Q2 2023 | 29 |
| Q3 2023 | 30 |
| Q4 2023 | 31 |
| Q1 2024 | 32 |
| Q2 2024 | 34 |
| Q3 2024 | 34 |
| Q4 2024 | 42 |
| Q1 2025 | 39 |
| Q2 2025 | 54 |
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 2023 | 9 | 9 |
| Q4 2023 | 10 | 12 |
| Q1 2024 | 9 | 12 |
| Q2 2024 | 13 | 12 |
| Q3 2024 | 10 | 11 |
| Q4 2024 | 16 | 16 |
| Q1 2025 | 14 | 17 |
| Q2 2025 | 39 | 12 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $13.9k | $1.2k | 0.09 |
| Q4 2024 | $4.5k | $26.2k | 5.82 |
| Q1 2025 | $18.2k | $66.1k | 3.63 |
| Q2 2025 | $55.9k | $16.6k | 0.30 |
Biggest buyers
| Balyasny Asset Management L.P. | New | +718.8k |
| WEXFORD CAPITAL LP | New | +416.3k |
| UBS Group AG | Added | +383.7k |
| Russell Investments Group, Ltd. | New | +220.6k |
| FourWorld Capital Management LLC | New | +208.5k |
| VANGUARD GROUP INC | Added | +190.7k |
| RTW INVESTMENTS, LP | Added | +185.0k |
| Manatuck Hill Partners, LLC | New | +175.0k |
| Massar Capital Management, LP | Added | +149.2k |
| Point72 Asset Management, L.P. | New | +136.4k |
Biggest sellers
| PERKINS CAPITAL MANAGEMENT INC | Reduced | -191.1k |
| Hudson Bay Capital Management LP | Sold out | -166.7k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -115.8k |
| MARSHALL WACE, LLP | Sold out | -106.6k |
| Stonepine Capital Management, LLC | Sold out | -95.7k |
| TORONTO DOMINION BANK | Reduced | -40.1k |
| Palumbo Wealth Management LLC | Reduced | -33.2k |
| PRUDENTIAL FINANCIAL INC | Sold out | -16.2k |
| GSA CAPITAL PARTNERS LLP | Sold out | -12.3k |
| CITADEL ADVISORS LLC | Sold out | -4.3k |
Biggest calls
| SIMPLEX TRADING, LLC | Added | $35.0k5.1k shares |
| GROUP ONE TRADING LLC | New | $20.9k3.0k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| SIMPLEX TRADING, LLC | New | $11.0k1.7k shares |
| GROUP ONE TRADING LLC | New | $5.6k800 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 |
|---|---|
| Chernett Jorey 13G · passive investor +4.5 pts · filed 2026-05-20 | 9.9% |
| NMSIC Co-Investment Fund, L.P. 13G · exempt (held before listing) -3.8 pts · filed 2026-02-11 | 6.0% |
| Parian Ultreia LP 13G · exempt (held before listing) new · filed 2026-05-27 | 5.3% |
Fell to 5% or below in the last year: RTW INVESTMENTS, LP (4.9%, 2026-02-17)
Insider purchases and sales in Q2 2025
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 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 1 | $59.2k | — |
| Q1 2024 | 0 | — | 1 | $37.6k | — |
| Q2 2024 | 1 | $77.6k | 0 | — | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 2 | $134.7k | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
None reported in Q2 2025.
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| RTW INVESTMENTS, LP 0.17% of their portfolio | 1.7m $11.8m | Added +185.0k |
| TORONTO DOMINION BANK 0.01% of their portfolio | 851.3k $5.9m | Reduced -40.1k |
| Balyasny Asset Management L.P. 0.01% of their portfolio | 718.8k $5.0m | New |
| VANGUARD GROUP INC 0.00% of their portfolio | 681.6k $4.8m | Added +190.7k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.02% of their portfolio | 531.8k $3.7m | Unchanged |
| MORGAN STANLEY 0.00% of their portfolio | 525.0k $3.7m | Added +39.1k |
| Driehaus Capital Management LLC 0.03% of their portfolio | 480.9k $3.4m | Added +62.4k |
| UBS Group AG 0.00% of their portfolio | 446.2k $3.1m | Added +383.7k |
| WEXFORD CAPITAL LP 0.81% of their portfolio | 416.3k $2.9m | New |
| KENNEDY CAPITAL MANAGEMENT LLC 0.05% of their portfolio | 310.7k $2.2m | Added +15.6k |
| PERKINS CAPITAL MANAGEMENT INC 1.63% of their portfolio | 231.9k $1.6m | Reduced -191.1k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 220.6k $1.5m | New |
| FourWorld Capital Management LLC 1.05% of their portfolio | 208.5k $1.5m | New |
| Manatuck Hill Partners, LLC 0.46% of their portfolio | 175.0k $1.2m | New |
| Massar Capital Management, LP 0.89% of their portfolio | 170.0k $1.2m | Added +149.2k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 146.5k $1.0m | Added +45.9k |
| Point72 Asset Management, L.P. 0.00% of their portfolio | 136.4k $951.9k | New |
| Mink Brook Asset Management LLC 0.79% of their portfolio | 130.0k $907.4k | New |
| Informed Momentum Co LLC 0.10% of their portfolio | 97.8k $682.5k | New |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 95.0k $662.8k | New |
| Huntleigh Advisors, Inc. 0.12% of their portfolio | 87.9k $613.3k | Added +4.8k |
| BlackRock, Inc. 0.00% of their portfolio | 81.5k $568.9k | Added +48.1k |
| Calamos Advisors LLC 0.00% of their portfolio | 75.4k $526.4k | New |
| CITIZENS FINANCIAL GROUP INC/RI 0.01% of their portfolio | 67.6k $471.8k | New |
| Palumbo Wealth Management LLC 0.14% of their portfolio | 66.0k $460.8k | Reduced -33.2k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 63.0k $439.7k | New |
| Nantahala Capital Management, LLC 0.03% of their portfolio | 61.2k $427.1k | Unchanged |
| Penbrook Management LLC 0.11% of their portfolio | 59.3k $280.3k | Added +19.9k |
| STATE STREET CORP 0.00% of their portfolio | 56.8k $396.4k | Added +23.1k |
| BRC Group Holdings, Inc. 0.41% of their portfolio | 50.0k $349.0k | New |
| Quadrature Capital Ltd 0.00% of their portfolio | 31.1k $216.8k | New |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 30.2k $211.0k | Unchanged |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 27.8k $194.0k | Added +2.6k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 22.6k $157.8k | New |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 21.0k $146.6k | Reduced -115.8k |
| OCCUDO QUANTITATIVE STRATEGIES LP 0.02% of their portfolio | 19.8k $138.3k | New |
| XTX Topco Ltd 0.01% of their portfolio | 19.0k $132.8k | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 18.4k $128.3k | Unchanged |
| Corient Private Wealth LP 0.00% of their portfolio | 14.6k $101.6k | Unchanged |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 12.6k $87.0k | Added +5.6k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 11.7k $80.0k | Added +11.0k |
| Virtu Financial LLC 0.00% of their portfolio | 10.0k $70.0k | New |
| Allworth Financial LP 0.00% of their portfolio | 7.0k $49.0k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 5.4k $37.6k | Added +3.0k |
| BARCLAYS PLC 0.00% of their portfolio | 5.1k $35.9k | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 4.2k $29.4k | Reduced -127 |
| Truvestments Capital LLC 0.00% of their portfolio | 2.5k $17.2k | New |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 1.6k $10.9k | New |
| LAZARD ASSET MANAGEMENT LLC 0.00% of their portfolio | 1.2k $8.0k | New |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 1.0k $7.0k | Unchanged |
| FMR LLC 0.00% of their portfolio | 357 $2.5k | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 34 $237 | Added +5 |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 5 $35 | Unchanged |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio | 0 $0 | Unchanged |