| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Director
2 companies
Christopher J Twomey is Director at BNGO and has filed Form 4s across 2 companies. Christopher J Twomey's net worth is not public. Form 4 filings only show shares in the companies where this person is an insider; those holdings are worth an estimated $509K at current prices.
Historically, Christopher J Twomey's trades have earned a middling insider score of 59/100 across 7 rated trades. Over a 12-month horizon, 71.4% of those trades were profitable, with an average 12-month return of +28.3%.
The biggest single holding is TNDM (~$431K) as Director. Net of sales, the TNDM filings show accumulation of 20,975 shares.
Christopher J Twomey has 39 Form 4 filings on record from November 2015 to October 2026, across 2 companies: Director at Tandem Diabetes Care (TNDM), 2015–2026; Director at Bionano Genomics (BNGO), 2018–2026.
The 70 reported transactions were 24 option or other derivative awards, 23 open-market sales, 11 option exercises and 6 gifts, plus smaller numbers of other types.
Counted by filing, the open-market trades come to 2 purchases worth about $211K and 11 sales worth about $5.3M.
The largest open-market purchase was 75,000 shares of TNDM at an average $2.00 on February 9, 2018, about $150K.
The largest open-market sale was 8,696 shares of TNDM at an average $115.00 on September 2, 2021, about $1.0M. Twelve months later TNDM was down 61%.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Oct 27, 2026 | TNDM Tandem Diabetes Care, Inc. | Director | Sale+OE10b5-1 | 1,700 | $19.15 | $32,555.00 | -6.5% | - | - | |
| May 5, 2022 | TNDM Tandem Diabetes Care Inc | Director | Sale+OE | 248 | $111.73 | $27,709.04 | -3.2% | -14.0% | -56.3% | |
| Sep 7, 2021 | TNDM Tandem Diabetes Care Inc | Director | Sell | 304 | $123.00 | $37,392.00 | -3.9% | +1.2% | -64.7% | |
| Sep 2, 2021 | TNDM Tandem Diabetes Care Inc | Director | Sell | 8,696 | $115.00 | $1,000,077.50 | -52.6% | +9.9% | -60.6% | |
| Jul 29, 2021 | TNDM Tandem Diabetes Care Inc | Director | Sell | 8,000 | $105.00 | $840,000.00 | -41.0% | +23.6% | -37.1% | |
| May 19, 2021 | TNDM Tandem Diabetes Care Inc | Director | Sale+OE | 269 | $89.03 | $23,949.07 | -1.8% | +36.1% | -10.7% | |
| Apr 22, 2021 | TNDM Tandem Diabetes Care Inc | Director | Sell | 8,000 | $95.01 | $760,057.72 | -35.6% | +7.5% | +12.6% | |
| Jul 31, 2020 | TNDM Tandem Diabetes Care Inc | Director | Sell | 7,500 | $110.04 | $825,319.50 | -30.0% | - | - | |
| Jul 2, 2020 | TNDM Tandem Diabetes Care Inc | Director | Sell | 7,500 | $100.28 | $752,073.72 | -27.3% | - | - | |
| May 7, 2020 | TNDM Tandem Diabetes Care Inc | Director | Sell | 7,500 | $90.03 | $675,214.50 | -25.0% | - | - |