Mammoth Biosciences — 25 certified H-1B filings (FY2019–FY2026)
- 4
- Filings · FY2025
- $140k
- Median base · FY2025
- Scientist I
- Top role · 4 all-time
- CA
- Top state · 25 all-time
Mammoth Biosciences filed 4 certified H-1B LCAs in FY2025 (down 43% from the year before), with a median base salary of $140k and the middle 50% of offers between $120k and $140k. That is 29% above the market median for the same job titles. Across all years it has 25 certified filings since FY2019, most often for Scientist I in California.
How much does Mammoth Biosciences pay H-1B workers?
Certified base salary by fiscal year: each box is the p25–p75 range, the heavy line the median, the whiskers reach p10–p90. $140k median in FY2025. Base pay only — hover a year for its figures.
How has Mammoth Biosciences's H-1B hiring changed by year?
2 certified filings in FY2019 → 3 in FY2026. The change column is each year against the one before.
| Fiscal year | Filings | vs prior FY | Median base |
|---|---|---|---|
| FY2026 | 3 | −25% | $140k |
| FY2025 | 4 | −43% | $140k |
| FY2024 | 7 | +250% | $110k |
| FY2023 | 2 | −50% | $128k |
| FY2022 | 4 | +33% | $125k |
| FY2021 | 3 | +50% | $108k |
| FY2019 | 2 | — | $76k |
Which wage levels does Mammoth Biosciences file?
DOL prevailing-wage levels I–IV approximate experience tiers (I = entry, IV = fully competent). 32% of Mammoth Biosciences's filings sit at Level III–IV. A heavy I–II skew reads as entry-level or contractor-style hiring; a heavy IV skew as senior in-house roles — and higher levels earn more lottery entries.
Share of 25 filings with a wage level · all years
- Level I12.0%3
- Level II56.0%14
- Level III32.0%8
What jobs does Mammoth Biosciences sponsor for H-1B?
The most-filed job titles across all years (DOL titles, employer pay-grade codes stripped), with base-salary percentiles.
| Job title | Filings | Median base |
|---|---|---|
| Scientist I | 4 | $125k |
| Scientist II | 3 | $140k |
| Scientist | 3 | $119k |
| Senior Project Manager | 2 | $140k |
| Research Associate | 2 | $76k |
| Senior Scientist I | 2 | $115k |
| Data Scientist | 1 | $88k |
| Research Associate II | 1 | $77k |
| Scientist II, Protein Sciences | 1 | $110k |
| Senior Data Scientist | 1 | $86k |
Where does Mammoth Biosciences hire H-1B workers?
Worksite states on the certified filings, all years. Deeper pink = more filings; hover a state for its figures.
| State | Filings | Median base |
|---|---|---|
| CA | 25 | $120k |
What has Mammoth Biosciences filed recently?
Every certified LCA on record for Mammoth Biosciences: job title, worksite, prevailing-wage level and the offered base salary.
| FY | Job title | Base salary |
|---|---|---|
| 2026 | Scientist II | $140,213 |
| 2026 | Scientist I | $140,213 |
| 2026 | Senior Research Associate | $85,000 |
| 2025 | Scientist II | $145,000 |
| 2025 | Senior Scientist I | $120,000 |
| 2025 | Senior Project Manager | $140,000 |
| 2025 | Senior Project Manager | $140,000 |
| 2024 | Senior Scientist I | $115,000 |
| 2024 | Scientist II | $127,150 |
| 2024 | Scientist I | $110,000 |
| 2024 | Research Associate II | $77,000 |
| 2024 | Associate Scientist | $105,000 |
| 2024 | Scientist II, Protein Sciences | $110,000 |
| 2024 | Senior Scientist | $154,500 |
| 2023 | Scientist I | $128,154 |
| 2023 | Sr. Scientist I | $150,000 |
| 2022 | Senior Data Scientist | $86,424 |
| 2022 | Sr. Scientist I, Protein Production | $150,000 |
| 2022 | Scientist I | $125,000 |
| 2022 | Scientist | $125,000 |
| 2021 | Data Scientist | $87,610 |
| 2021 | Scientist | $108,202 |
| 2021 | Scientist | $118,997 |
| 2019 | Research Associate | $83,866 |
| 2019 | Research Associate | $75,920 |
Common questions about Mammoth Biosciences's H-1B filings
- How much does Mammoth Biosciences pay H-1B workers?
- Mammoth Biosciences's median certified H-1B base salary is $140k (FY2025), from 4 filings. See the full salary distribution and percentiles above.
- How many H-1B workers does Mammoth Biosciences sponsor?
- Mammoth Biosciences has 25 certified H-1B Labor Condition Applications on record (FY2019–FY2026).
- What jobs does Mammoth Biosciences sponsor for H-1B?
- Mammoth Biosciences's most-sponsored H-1B roles include Scientist I, Scientist II, Scientist, Senior Project Manager.
- Where does Mammoth Biosciences hire H-1B workers?
- Mammoth Biosciences's top H-1B worksite states are CA.
- Does a certified LCA mean an H-1B visa was approved?
- No. A Labor Condition Application (LCA) is the Department of Labor attestation an employer must have certified before filing an H-1B petition with USCIS. It records the job, worksite and offered wage, but not whether the petition was filed, selected in the lottery, or approved. Filing counts measure intent to sponsor, not headcount.
- What salary do these figures show?
- The base annual wage offered on the certified LCA, converted to a yearly amount. Bonus, equity, overtime and benefits are not included, so total compensation is typically higher. Figures are medians and percentiles over certified filings; wages above $5,000,000 a year are excluded as data-entry errors.
- What do prevailing-wage levels I–IV mean?
- The Department of Labor assigns each LCA an OES wage level from I (entry) to IV (fully competent) for the occupation and area. Under the FY2027 wage-weighted H-1B lottery rule, a higher level earns more selection entries, so an employer's level mix is a proxy for how senior its sponsored roles are.
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Source: U.S. Department of Labor, Office of Foreign Labor Certification — certified LCA disclosure data through June 2026 (FY2019–FY2026). An LCA is not an approved visa; pay figures are base salary and exclude bonus and equity. Methodology →