Chuck Royce's TNDM Position Overview
Chuck Royce (via Royce & Associates Lp) currently holds 696,590 shares of Tandem Diabetes Care, Inc. (TNDM) worth $13.35 M, representing 0.13% of the portfolio. First purchased in 2019-Q3, this medium-term investment has been held for 12 quarters.
Based on 13F filings, Chuck Royce has maintained a strategic position in TNDM, demonstrating sustained confidence in this investment. Largest addition occurred in Q3 2025, adding 510,000 shares. Largest reduction occurred in Q3 2021, reducing 78,286 shares.
Analysis based on 13F filings available since 2013 Q2
Chuck Royce's Tandem Diabetes Care (TNDM) Holding Value Over Time
Track share changes against reported price movement
Quarterly Tandem Diabetes Care (TNDM) Trades by Chuck Royce
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q1 2026 | +46,340 | Add 7.13% | 696,590 | $19.17 |
| Q4 2025 | +140,250 | Add 27.50% | 650,250 | $21.98 |
| Q3 2025 | +510,000 | New Buy | 510,000 | $12.14 |
| Q3 2021 | -78,286 | Sold Out | 0 | $0.00 |
| Q2 2021 | +9,900 | Add 14.48% | 78,286 | $97.40 |
| Q1 2021 | +1,300 | Add 1.94% | 68,386 | $88.25 |
| Q4 2020 | +31,800 | Add 90.12% | 67,086 | $95.68 |
| Q3 2020 | +11,700 | Add 49.61% | 35,286 | $113.50 |
| Q2 2020 | -14,000 | Reduce 37.25% | 23,586 | $98.91 |
| Q1 2020 | -29,500 | Reduce 43.97% | 37,586 | $64.36 |
| Q4 2019 | +16,586 | Add 32.84% | 67,086 | $59.61 |
| Q3 2019 | +50,500 | New Buy | 50,500 | $58.97 |
Chuck Royce's Tandem Diabetes Care Investment FAQs
Chuck Royce first purchased Tandem Diabetes Care, Inc. (TNDM) in Q3 2019, acquiring 50,500 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Chuck Royce has held Tandem Diabetes Care, Inc. (TNDM) for 12 quarters since Q3 2019.
Chuck Royce's largest addition to Tandem Diabetes Care, Inc. (TNDM) was in Q3 2025, adding 510,000 shares worth $6.19 M.
According to the latest 13F filing for Q1 2026, Chuck Royce's firm, Royce & Associates Lp, owns 696,590 shares of Tandem Diabetes Care, Inc. (TNDM), valued at approximately $13.35 M.
As of the Q1 2026 filing, Tandem Diabetes Care, Inc. (TNDM) represents approximately 0.13% of Chuck Royce's publicly disclosed stock portfolio, making it one of their key holdings.
Chuck Royce's peak holding in Tandem Diabetes Care, Inc. (TNDM) was 696,590 shares, as reported at the end of Q1 2026.