Inclusion Criteria:

For rheumatoid arthritis:

• Moderate-to-severely active RA as defined by the presence of ≥4 swollen joints (based on 28 joint count) and ≥4 tender joints (based on 28 joint count) at Screening and Day 1.

• Documentation of ≥1 of the following:

  1. Positive test results for rheumatoid factor or anti-citrullinated peptide antibodies at Screening, OR
  2. Radiology report documenting bony erosions in hands or feet consistent with RA on previous radiographs

• Inadequate response (defined as signs and symptoms of persistently active disease, loss of response, or intolerance) to:

  1. ≥1 csDMARD treatment; AND/OR
  2. ≤2 classes of bDMARD/tsDMARD treatment (>2 classes of bDMARDs and/or tsDMARDs is exclusionary)

For axial spondyloarthritis:

• Moderate-to-severely active axSpA defined by BOTH of the following at Screening AND Day 1:

  1. BASDAI ≥4, AND
  2. Back pain ≥4 (from BASDAI Item 2)

• hsCRP greater than the ULN per the central laboratory at Screening

• Inadequate response (defined as signs and symptoms of persistently active disease, loss of response, or intolerance) to:

  1. 2 different NSAIDs given at the maximum tolerated dose for ≥4 weeks or intolerant to or has a contraindication to NSAID therapy; AND/OR
  2. ≤2 classes of bDMARD (anti-TNF or anti-IL-17)/tsDMARD at an approved dose for ≥12 weeks (>2 classes of bDMARDs/tsDMARDs is exclusionary)

For psoriatic arthritis:

• Screening and Day 1 TJC ≥3 out of 68 and SJC ≥3 out of 66 (dactylitis counts as 1 joint each)

• ≥1 active plaque psoriasis lesion and/or a documented history of psoriasis

• Inadequate response (defined as signs and symptoms of persistently active disease, loss of response, or intolerance) to:

  1. ≥1 NSAID treatment; AND
  2. ≥1 csDMARD treatment; AND/OR ≤2 classes of bDMARD/tsDMARD treatment (>2 classes of bDMARDs and/or tsDMARDs is exclusionary)

Exclusion Criteria:

• Inadequate response to >2 classes of bDMARDs/tsDMARDs
• Other autoimmune, rheumatologic, inflammatory diseases or pain-amplification syndromes that might confound the evaluations of efficacy of SPY072