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. Holder counts are more reliable. Shares outstanding: 24.2m 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 ≈ $4.65. Options: 2 managers hold calls ($101.8k notional), 0 hold puts (—).
Trends to Q2 2026
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 |
| Q3 2025 | 62 |
| Q4 2025 | 80 |
| Q1 2026 | 61 |
| Q2 2026 | 57 |
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 | 10 | 11 |
| Q4 2024 | 16 | 16 |
| Q1 2025 | 14 | 17 |
| Q2 2025 | 39 | 12 |
| Q3 2025 | 43 | 23 |
| Q4 2025 | 57 | 24 |
| Q1 2026 | 30 | 48 |
| Q2 2026 | 23 | 35 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $623.6k | $29.8k | 0.05 |
| Q4 2025 | $431.7k | $0 | 0.00 |
| Q1 2026 | $63.3k | $300 | 0.00 |
| Q2 2026 | $101.8k | $0 | 0.00 |
Biggest buyers
| First Eagle Investment Management, LLC | Added | +488.7k |
| FLPUTNAM INVESTMENT MANAGEMENT CO | New | +288.8k |
| MARSHALL WACE, LLP | Added | +279.4k |
| FourWorld Capital Management LLC | Added | +156.6k |
| Mink Brook Asset Management LLC | Added | +106.9k |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | Added | +90.0k |
| JANE STREET GROUP, LLC | Added | +85.8k |
| GWN SECURITIES INC. | New | +78.0k |
| Man Group plc | Added | +37.6k |
| Invesco Ltd. | New | +21.1k |
Biggest sellers
| Balyasny Asset Management L.P. | Sold out | -796.6k |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | -379.0k |
| CITADEL ADVISORS LLC | Reduced | -216.7k |
| RTW INVESTMENTS, LP | Reduced | -200.2k |
| Squarepoint Ops LLC | Reduced | -179.8k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -163.7k |
| Massar Capital Management, LP | Sold out | -140.0k |
| SEI INVESTMENTS CO | Reduced | -135.2k |
| XTX Topco Ltd | Reduced | -130.3k |
| TWO SIGMA INVESTMENTS, LP | Reduced | -97.8k |
Biggest calls
| IMC-Chicago, LLC | New | $83.2k17.9k shares |
| SIMPLEX TRADING, LLC | Reduced | $18.6k4.0k shares |
Biggest puts
| None |
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 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.
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 |
|---|---|---|---|---|---|
| Q4 2024 | 2 | $134.7k | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 1 | $200.4k | — |
| Q4 2025 | 0 | — | 1 | $375.7k | — |
| Q1 2026 | 0 | — | 2 | $103.8k | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 1 | $148.8k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-01 | Black Jeffrey G. Chief Financial Officer | Sold | $148.8k20.6k 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 2026
| Manager | Shares | Change |
|---|---|---|
| WEXFORD CAPITAL LP 0.51% of their portfolio | 792.9k $3.7m | Unchanged |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P 2.41% of their portfolio | 675.0k $3.1m | Added +90.0k |
| First Eagle Investment Management, LLC 0.00% of their portfolio | 613.9k $2.9m | Added +488.7k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 612.8k $2.8m | Reduced -65.8k |
| FourWorld Capital Management LLC 3.54% of their portfolio | 596.5k $2.8m | Added +156.6k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.02% of their portfolio | 514.8k $2.4m | Reduced -23.1k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.04% of their portfolio | 485.0k $2.3m | Reduced -8.6k |
| Mink Brook Asset Management LLC 0.98% of their portfolio | 475.9k $2.2m | Added +106.9k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 322.5k $1.5m | Added +85.8k |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 310.1k $1.4m | Reduced -379.0k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 306.7k $1.4m | Added +279.4k |
| FLPUTNAM INVESTMENT MANAGEMENT CO 0.02% of their portfolio | 288.8k $1.3m | New |
| GSA CAPITAL PARTNERS LLP 0.06% of their portfolio | 214.7k $998.0k | Reduced -38.3k |
| RTW INVESTMENTS, LP 0.01% of their portfolio | 195.0k $906.8k | Reduced -200.2k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 185.7k $863.9k | Added +6.8k |
| Man Group plc 0.00% of their portfolio | 167.3k $777.9k | Added +37.6k |
| BlackRock, Inc. 0.00% of their portfolio | 142.6k $663.2k | Added +16.7k |
| PERCEPTIVE ADVISORS LLC 0.01% of their portfolio | 114.9k $534.3k | Unchanged |
| XTX Topco Ltd 0.01% of their portfolio | 111.9k $520.6k | Reduced -130.3k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 109.0k $506.9k | Reduced -135.2k |
| Squarepoint Ops LLC 0.00% of their portfolio | 109.0k $506.8k | Reduced -179.8k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 108.6k $505.2k | Added +11.3k |
| GWN SECURITIES INC. 0.06% of their portfolio | 78.0k $362.9k | New |
| STATE STREET CORP 0.00% of their portfolio | 71.3k $331.3k | Unchanged |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 62.6k $291.0k | Unchanged |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 60.0k $279.0k | Reduced -97.8k |
| PERKINS CAPITAL MANAGEMENT INC 0.20% of their portfolio | 56.8k $264.1k | Reduced -15.0k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 52.1k $242.2k | Reduced -69.4k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 49.7k $231.2k | Added +15.1k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 39.6k $184.1k | Reduced -163.7k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 39.5k $183.7k | Added +2.0k |
| Engineers Gate Manager LP 0.00% of their portfolio | 37.0k $172.1k | Reduced -49.2k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 30.0k $139.5k | Reduced -57.4k |
| AXQ CAPITAL, LP 0.01% of their portfolio | 27.9k $130.0k | Reduced -6.6k |
| R Squared Ltd 0.06% of their portfolio | 26.1k $121.2k | Reduced -1.0k |
| Invesco Ltd. 0.00% of their portfolio | 21.1k $98.3k | New |
| Bank of New York Mellon Corp 0.00% of their portfolio | 20.9k $97.4k | Unchanged |
| Arax Advisory Partners 0.00% of their portfolio | 20.9k $97.3k | Unchanged |
| OCCUDO QUANTITATIVE STRATEGIES LP 0.01% of their portfolio | 20.6k $95.9k | Reduced -7.2k |
| HRT FINANCIAL LP 0.00% of their portfolio | 16.1k $74.0k | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 14.4k $66.9k | Reduced -216.7k |
| Jump Financial, LLC 0.00% of their portfolio | 11.7k $54.5k | New |
| Corient Private Wealth LP 0.00% of their portfolio | 11.1k $51.6k | Unchanged |
| MORGAN STANLEY 0.00% of their portfolio | 6.3k $29.5k | Reduced -5.9k |
| Truvestments Capital LLC 0.00% of their portfolio | 5.7k $26.3k | Reduced -510 |
| BARCLAYS PLC 0.00% of their portfolio | 5.5k $25.5k | Reduced -15.7k |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 4.1k $19.3k | Unchanged |
| UBS Group AG 0.00% of their portfolio | 4.1k $18.9k | Reduced -23.8k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 3.0k $13.8k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 2.4k $11.1k | Unchanged |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 1.1k $5.1k | Added +100 |
| Geneos Wealth Management Inc. 0.00% of their portfolio | 1.0k $4.7k | New |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 200 $916 | Unchanged |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 128 $608 | Added +123 |
| FMR LLC 0.00% of their portfolio | 100 $465 | New |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 48 $223 | Added +46 |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 29 $135 | Reduced -19.8k |