# Sierra Oncology, Inc.

Sierra Oncology, Inc. is a company headquartered in San Mateo, CA, United States.

## Company overview

- **Legal name:** Sierra Oncology, Inc.
- **Former names in filing history:** ProNAi Therapeutics Inc (2004-05-12 to 2017-01-04)
- **Classification:** Company
- **Industry (SIC):** 2834 — Pharmaceutical Preparations
- **Headquarters:** San Mateo, CA, United States
- **Incorporated in:** DE
- **Fiscal year end:** December 31
- **SEC CIK:** 0001290149

## About

Sierra Oncology, Inc. is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0001290149, and its reported industry is Pharmaceutical Preparations. In 10-K filed on 2022-03-10, it reported net income of USD -94,659,000; total assets of USD 109,367,000 for the fiscal period ended 2021-12-31. The financial history preserves reporting periods, currencies, filing accessions and source provenance. Figures are reported filing data, rather than real-time estimates.

## Financials

Annual figures as originally reported. Currency is shown for each fiscal year; B means billion and M means million.

### FY2021 (period ended 2021-12-31)

- **Net income:** -$94.7M (USD -94,659,000)
- **Total assets:** $109.4M (USD 109,367,000)
- **Cash and equivalents:** $104.7M (USD 104,749,000)
- **Operating cash flow:** -$79.0M (USD -78,964,000)

### FY2020 (period ended 2020-12-31)

- **Revenue:** $300,000 (USD 300,000)
- **Net income:** -$80.9M (USD -80,902,000)
- **Total assets:** $107.5M (USD 107,487,000)
- **Cash and equivalents:** $104.1M (USD 104,055,000)
- **Operating cash flow:** -$52.4M (USD -52,367,000)

### FY2019 (period ended 2019-12-31)

- **Net income:** -$88.3M (USD -88,275,000)
- **Total assets:** $151.3M (USD 151,328,000)
- **Cash and equivalents:** $147.5M (USD 147,528,000)
- **Operating cash flow:** -$51.2M (USD -51,183,000)

### FY2018 (period ended 2018-12-31)

- **Net income:** -$53.3M (USD -53,335,000)
- **Total assets:** $109.5M (USD 109,469,000)
- **Cash and equivalents:** $106.0M (USD 106,046,000)
- **Operating cash flow:** -$45.1M (USD -45,115,000)

## Recent SEC filings

- Form 8-K — filed 2022-07-01 — period 2022-07-01 — 8-K
- Form 8-K — filed 2022-06-29 — period 2022-06-29 — 8-K
- Form 8-K — filed 2022-06-22 — period 2022-06-22 — 8-K
- Form 8-K — filed 2022-06-01 — period 2022-05-31 — 8-K
- Form 10-Q — filed 2022-05-06 — period 2022-03-31 — 10-Q
- Form 8-K — filed 2022-05-06 — period 2022-05-06 — 8-K
- Form 10-K/A — filed 2022-04-29 — period 2021-12-31 — FORM 10-K/A
- Form SC 13G — filed 2022-04-22
- Form 8-K — filed 2022-04-13 — period 2022-04-12 — 8-K
- Form 8-K — filed 2022-03-23 — period 2022-03-22 — 8-K (KOWALSKI AGREEMENTS)
- Form 10-K — filed 2022-03-10 — period 2021-12-31 — 10-K
- Form 8-K — filed 2022-03-10 — period 2022-03-10 — 8-K

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Updated: 2026-10-23T20:08:00Z

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