Tandem Diabetes Care (TNDM) Latest Stock Analysis Report – Oct 15, 2026, 4:00 PM ET
Updated Oct 15, 2026, 4:00 PM ET
- Closed at $16.52, +3.19% vs the prior close of $16.01.
- Volume 4.59M shares, 2.2x its 50-day average (heavy).
- No new SEC filings since the prior session.
- No new insider buys or sales reported since the prior session.
TNDM jumps 3.2% to $16.52 on 2.2x normal volume. Closed at $16.52, +3.19% vs the prior close of $16.01. Day range $15.61–$16.55, opened at $16.01.
TNDM daily analysis — what happened
A plain-English, data-only note written after every US trading day. Newest first; older days stay archived below.
Oct 15, 2026 — TNDM jumps 3.2% to $16.52 on 2.2x normal volume
- Closed at $16.52, +3.19% vs the prior close of $16.01. Day range $15.61–$16.55, opened at $16.01.
- Volume was 4.59M shares, 2.2x its 50-day average of 2.05M — unusually heavy trading.
- Price is -13.3% vs its 50-day average ($19.06) and -13.8% vs its 200-day average ($19.16).
- 52-week range $12.26–$29.65; today's close sits at 24% of that range, 44.3% below the 52-week high.
Oct 14, 2026 — TNDM slides 3.8% to $16.01
- Closed at $16.01, -3.84% vs the prior close of $16.65. Day range $15.86–$16.70, opened at $16.64.
- Volume was 2.22M shares, 1.1x its 50-day average of 2.06M.
- Price is -16.3% vs its 50-day average ($19.12) and -16.6% vs its 200-day average ($19.19).
- 52-week range $12.26–$29.65; today's close sits at 22% of that range, 46.0% below the 52-week high.
Oct 13, 2026 — TNDM rises 1.2% to $16.65, 3 up days in a row
- Closed at $16.65, +1.22% vs the prior close of $16.45. Day range $15.72–$16.80, opened at $16.24.
- Volume was 1.71M shares, 0.8x its 50-day average of 2.09M.
- Price is -13.3% vs its 50-day average ($19.21) and -13.4% vs its 200-day average ($19.22).
- 52-week range $12.26–$29.65; today's close sits at 25% of that range, 43.8% below the 52-week high.
- That makes 3 straight gains.
Oct 12, 2026 — TNDM rises 2.1% to $16.45
- Closed at $16.45, +2.11% vs the prior close of $16.11. Day range $15.86–$16.91, opened at $16.11.
- Volume was 1.58M shares, 0.8x its 50-day average of 2.10M.
- Price is -14.7% vs its 50-day average ($19.28) and -14.6% vs its 200-day average ($19.25).
- 52-week range $12.26–$29.65; today's close sits at 24% of that range, 44.5% below the 52-week high.
Oct 9, 2026 — TNDM rises 2.8% to $16.11
- Closed at $16.11, +2.78% vs the prior close of $15.68. Day range $15.38–$16.13, opened at $15.64.
- Volume was 1.43M shares, 0.7x its 50-day average of 2.11M.
- Price is -16.7% vs its 50-day average ($19.34) and -16.5% vs its 200-day average ($19.28).
- 52-week range $12.26–$29.65; today's close sits at 22% of that range, 45.7% below the 52-week high.
Oct 8, 2026 — TNDM dips 1.0% to $15.68, 3 down days in a row
- Closed at $15.68, -1.04% vs the prior close of $15.84. Day range $15.12–$15.77, opened at $15.57.
- Volume was 2.90M shares, 1.4x its 50-day average of 2.09M.
- Price is -19.2% vs its 50-day average ($19.39) and -18.9% vs its 200-day average ($19.32).
- 52-week range $12.26–$29.65; today's close sits at 20% of that range, 47.1% below the 52-week high.
- That makes 3 straight losses.
Oct 7, 2026 — TNDM dips 2.0% to $15.84
- Closed at $15.84, -1.98% vs the prior close of $16.16. Day range $15.73–$16.64, opened at $15.80.
- Volume was 2.27M shares, 1.1x its 50-day average of 2.08M.
- Price is -18.6% vs its 50-day average ($19.45) and -18.1% vs its 200-day average ($19.35).
- 52-week range $12.26–$29.65; today's close sits at 21% of that range, 46.6% below the 52-week high.
Oct 6, 2026 — TNDM dips 2.2% to $16.16
- Closed at $16.16, -2.18% vs the prior close of $16.52. Day range $15.94–$17.05, opened at $16.77.
- Volume was 1.48M shares, 0.7x its 50-day average of 2.08M.
- Price is -17.1% vs its 50-day average ($19.49) and -16.6% vs its 200-day average ($19.38).
- 52-week range $12.26–$29.65; today's close sits at 22% of that range, 45.5% below the 52-week high.
Oct 5, 2026 — TNDM ends flat (+0.1%) to $16.52
- Closed at $16.52, +0.12% vs the prior close of $16.50. Day range $16.14–$16.95, opened at $16.50.
- Volume was 1.79M shares, 0.9x its 50-day average of 2.07M.
- Price is -15.3% vs its 50-day average ($19.51) and -14.9% vs its 200-day average ($19.41).
- 52-week range $12.26–$29.65; today's close sits at 24% of that range, 44.3% below the 52-week high.
Oct 2, 2026 — TNDM ends flat (+0.0%) to $16.50
- Closed at $16.50, +0.00% vs the prior close of $16.50. Day range $16.27–$17.35, opened at $16.66.
- Volume was 2.19M shares, 1.1x its 50-day average of 2.05M.
- Price is -15.5% vs its 50-day average ($19.52) and -15.1% vs its 200-day average ($19.44).
- 52-week range $12.26–$29.65; today's close sits at 24% of that range, 44.4% below the 52-week high.
TNDM latest news & SEC filings
Every SEC filing by or about TNDM in the last 120 days, explained in plain English. Updated daily, with a same-day refresh for new filings.
Sep 17, 2026 · Form 144 — Planned insider sale
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Aug 18, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 18, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 18, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 18, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 18, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Aug 6, 2026 · Form 10-Q — Quarterly report
Quarterly report (unaudited financial statements for the quarter)
Quarter ended Jun 30, 2026:
- Revenue: $254.56M (prior year $240.68M) (+5.8% vs Jun 30, 2025)
- Net income: -$21.17M (prior year -$52.40M) (loss narrowed vs Jun 30, 2025)
- Diluted EPS: -$0.31 (prior year -$0.78) (loss narrowed vs Jun 30, 2025)
Aug 6, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 2.02 — Reported results of operations (earnings release).
This is a results-day filing: the earnings press release is attached as an exhibit.
Aug 6, 2026 · Form SCHEDULE 13G/A — Update to a passive 5%+ stake (13G)
Update to a passive 5%+ stake (13G)
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Things to know before you trade TNDM
- Last results release: Aug 6, 2026 (8-K Item 2.02). Previous ones: May 7, 2026, Feb 19, 2026, Nov 6, 2025. Based on that rhythm, the next report is likely around Nov 5, 2026 — an estimate, not a confirmed date.
- How much it moves: over the last 20 sessions the average daily move was 2.53% (largest 7.1%).
- Liquidity: about 2.34M shares (≈$38.73M) trade per day on average.
- 52-week position: $16.52 vs a range of $12.26–$29.65 (24% of the range).
- Dividends: no cash dividends in the last 2 years.
- Splits: none in the last 2 years.
- Insider trades (Form 4, last 12 months, recent 25 shown): 0 open-market buys, 2 sales; latest: Mark David Novara sold 187 shares on Mar 17, 2026.
- Latest filings: 10-Q Aug 6, 2026; 8-K Aug 6, 2026; 8-K May 21, 2026.
- Share count: 69.58M shares outstanding (Aug 3, 2026), +3.0% vs a year earlier.
- Listing: Nasdaq · industry: Surgical & Medical Instruments & Apparatus.
TNDM market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 15, 2026 | 16.01 | 16.55 | 15.61 | 16.52 | 4.59M |
| Oct 14, 2026 | 16.64 | 16.70 | 15.86 | 16.01 | 2.22M |
| Oct 13, 2026 | 16.24 | 16.80 | 15.72 | 16.65 | 1.71M |
| Oct 12, 2026 | 16.11 | 16.91 | 15.86 | 16.45 | 1.58M |
| Oct 9, 2026 | 15.64 | 16.13 | 15.38 | 16.11 | 1.43M |
| Oct 8, 2026 | 15.57 | 15.77 | 15.12 | 15.68 | 2.90M |
| Oct 7, 2026 | 15.80 | 16.64 | 15.73 | 15.84 | 2.27M |
| Oct 6, 2026 | 16.77 | 17.05 | 15.94 | 16.16 | 1.48M |
| Oct 5, 2026 | 16.50 | 16.95 | 16.14 | 16.52 | 1.79M |
| Oct 2, 2026 | 16.66 | 17.35 | 16.27 | 16.50 | 2.19M |
| Oct 1, 2026 | 16.42 | 16.58 | 16.04 | 16.50 | 2.40M |
| Sep 30, 2026 | 16.63 | 16.68 | 16.00 | 16.31 | 2.20M |
| Sep 29, 2026 | 16.24 | 16.65 | 15.87 | 16.57 | 1.89M |
| Sep 28, 2026 | 15.60 | 16.53 | 15.52 | 16.42 | 2.85M |
| Sep 25, 2026 | 15.20 | 16.18 | 14.83 | 15.72 | 2.84M |
| Sep 24, 2026 | 16.43 | 16.60 | 15.20 | 15.22 | 2.65M |
| Sep 23, 2026 | 17.44 | 17.67 | 15.86 | 16.38 | 2.81M |
| Sep 22, 2026 | 17.88 | 18.03 | 16.97 | 17.50 | 2.69M |
| Sep 21, 2026 | 17.01 | 17.83 | 16.60 | 17.62 | 2.10M |
| Sep 18, 2026 | 17.13 | 17.15 | 16.77 | 16.87 | 2.28M |
About Tandem Diabetes Care
Tandem Diabetes Care (TNDM) is listed on the Nasdaq and classified by the SEC under “Surgical & Medical Instruments & Apparatus”. Its business address is in San Diego, CA. State of incorporation: DE. Fiscal year ends December 31. SEC CIK 1438133.
TNDM board of directors & executives
From SEC Form 3/4/5 insider filings made in the last 12 months (date = latest filing).
Directors
| Name | Role | Latest filing |
|---|---|---|
| Sandra Beaver | Director | May 22, 2026 |
| Myoungil Cha | Director | May 22, 2026 |
| Peyton R Howell | Director | May 22, 2026 |
| Joao Paulo Falcao Malagueira | Director | May 22, 2026 |
| Kathleen Mcgroddy-Goetz | Director | May 22, 2026 |
| Rebecca B Robertson | Director | May 22, 2026 |
| John F Sheridan | PRESIDENT & CEO | Aug 18, 2026 |
| Rajwant Sodhi | Director | May 22, 2026 |
| Christopher J Twomey | Director | May 22, 2026 |
Executive officers
| Name | Title | Latest filing |
|---|---|---|
| Rick Carpenter | EVP & Chief Technology Officer | Aug 18, 2026 |
| Elizabeth Anne Gasser | EVP, Chief Strategy Officer | Aug 18, 2026 |
| Shannon Marie Hansen | EVP & Chief Legal Officer | Aug 18, 2026 |
| Jean-Claude Kyrillos | EVP & Chief Operating Officer | Aug 18, 2026 |
| Susan Morrison | EVP & Chief Admin. Officer | Aug 18, 2026 |
| Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | May 19, 2026 |
| John F Sheridan | PRESIDENT & CEO | Aug 18, 2026 |
| Leigh Vosseller | EVP & CHIEF FINANCIAL OFFICER | Aug 18, 2026 |
Recent insider buys & sales
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Mar 17, 2026 | Mark David Novara | Sale | 187 | $23.05 |
| Mar 5, 2026 | Mark David Novara | Sale | 2 | $22.81 |
TNDM financials (annual, from XBRL filings)
| Fiscal year end | Revenue | Net income | Diluted EPS | Operating cash flow |
|---|---|---|---|---|
| Dec 31, 2025 | $1.01B | $-204.71M | -3.04 | $-9.72M |
| Dec 31, 2024 | $940.20M | $-96.03M | -1.47 | $24.23M |
| Dec 31, 2023 | $747.72M | $-222.61M | -3.43 | $-31.81M |
| Dec 31, 2022 | $801.22M | $-94.59M | -1.47 | $50.46M |
| Dec 31, 2021 | $702.80M | $15.57M | 0.24 | $111.36M |
Latest balance sheet: total assets $1.15B, total liabilities $1.02B, cash $62.82M (as of Jun 30, 2026).
TNDM earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| Aug 6, 2026 | 8-K Item 2.02 (results) | $18.79 |
| May 7, 2026 | 8-K Item 2.02 (results) | $18.47 |
| Feb 19, 2026 | 8-K Item 2.02 (results) | $18.52 |
| Nov 6, 2025 | 8-K Item 2.02 (results) | $13.33 |
| Aug 6, 2025 | 8-K Item 2.02 (results) | $14.39 |
| Apr 30, 2025 | 8-K Item 2.02 (results) | $16.85 |
| Feb 26, 2025 | 8-K Item 2.02 (results) | $33.59 |
| Nov 6, 2024 | 8-K Item 2.02 (results) | $34.24 |
| Aug 1, 2024 | 8-K Item 2.02 (results) | — |
| May 2, 2024 | 8-K Item 2.02 (results) | — |
| Feb 21, 2024 | 8-K Item 2.02 (results) | — |
| Nov 1, 2023 | 8-K Item 2.02 (results) | — |
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Information only, not investment advice. BuyMeWhiskey is not a registered investment adviser or broker-dealer; nothing here is a recommendation to buy, sell or hold any security, and there are no price targets. Data comes from SEC EDGAR filings and public end-of-day market data and may be delayed or contain errors. Verify with the company's filings before making decisions. Prices: end-of-day data as of Oct 15, 2026, 4:00 PM ET. Filings: SEC EDGAR. Updated after every US trading day.