Tandem Diabetes Care (TNDM): Congress and insider trades
Who in Congress and inside the company traded TNDM, when each filing appeared, and what buying after each one would have earned against the S&P 500.
Key Facts
- Tandem Diabetes Care (TNDM) is a listed stock on NASDAQ.
- 3 members of Congress filed 2 buys and 2 sells of TNDM, the latest published 2026-04-08 (8 April 2026).
- Insiders filed 0 open market buys worth $0 and 1 sell worth $4.3K, the latest filed 2026-03-18 (18 March 2026).
- Across 2 scored buys, Congress averaged -16.0% against the S&P 500 (SPY) over the 90 days after disclosure, with 50% of them ahead of the index. That result is too few trades to draw a conclusion.
- Data as of 2026-09-29 (29 September 2026).
Congress trades in TNDM
as of 2026-04-08| Filed | Member | Type | Size | Days to file | 90 day vs S&P |
|---|---|---|---|---|---|
| 8 Apr 2026 | Gil Cisneros (D-CA) | buy | 1K–15K | 35 | -32.9% |
| 14 Aug 2023 | Daniel S. Goldman (D-NY) | sell | 1K–15K | 32 | n/a |
| 9 Sep 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 16 | n/a |
| 15 Jun 2022 | Ro Khanna (D-CA) | buy | 1K–15K | 18 | +0.9% |
Nothing matches that search.
Insider trades in TNDM
as of 2026-03-18| Filed | Insider | Type | Shares | Price | Value | 90 day vs S&P |
|---|---|---|---|---|---|---|
| 18 Mar 2026 | Novara Mark David | sell | 187 | $23.05 | $4.3K | n/a |
Nothing matches that search.
Related pages
Frequently asked questions
Who has bought TNDM?
2 Congress buys by 3 members and 0 insider buys are on file. The tables on this page list every one.
Did buying TNDM after a disclosure beat the market?
Across 2 scored buys, Congress averaged -16.0% against the S&P 500 (SPY) over the 90 days after disclosure, with 50% of them ahead of the index. That result is too few trades to draw a conclusion. A single stock is a small sample.
Sources: Congressional trades: STOCK Act disclosures, collected from CapitolTrades. Insider trades: SEC Form 4 filings, collected from Finviz. Prices: Yahoo Finance daily adjusted closes. Data as of 2026-09-29 (29 September 2026). About these sources.
Not investment advice. Past disclosed trades do not predict future returns. Disclosures are published late, so the trades shown are ones you could only have copied after the fact. Talk to a licensed adviser before you invest.