Introduction

This page provides a comprehensive analysis of the known insider trading history of Jereme M Sylvain. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

See the list of most profitable insider traders.

Companies with Reported Insider Positions

The SEC filings indicate Jereme M Sylvain has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:DXCM / DexCom, Inc. EVP, Chief Financal Officer 118,657
US:NUVA / Nuvasive Inc Chief Accounting Officer 931
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Jereme M Sylvain. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Trading History

This table shows the complete list of insider trades made by Jereme M Sylvain as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change
Share
Price
Tran
Value
Remaining
Value
2025-09-04 2025-09-02 4 DXCM DEXCOM INC
Common Stock
S - Sale X -4,824 118,657 -3.91 74.17 -357,796 8,800,790
2025-03-14 2025-03-12 4 DXCM DEXCOM INC
Common Stock
S - Sale -12,001 123,481 -8.86 70.38 -844,632 8,690,605
2025-03-11 2025-03-10 4 DXCM DEXCOM INC
Common Stock
S - Sale -1,127 135,482 -0.82 74.70 -84,189 10,120,817
2025-03-11 2025-03-10 4 DXCM DEXCOM INC
Common Stock
S - Sale -3,203 136,609 -2.29 74.04 -237,151 10,114,585
2025-03-11 2025-03-10 4 DXCM DEXCOM INC
Common Stock
S - Sale -2,670 139,812 -1.87 73.22 -195,489 10,236,615
2025-03-11 2025-03-08 4 DXCM DEXCOM INC
Common Stock
A - Award 22,798 142,482 19.05
2025-03-11 2025-03-08 4 DXCM DEXCOM INC
Common Stock
A - Award 35,906 119,684 42.86
2025-01-30 2025-01-29 4 DXCM DEXCOM INC
Common Stock
S - Sale -2,090 83,526 -2.44 86.91 -181,650 7,259,587
2025-01-30 2025-01-28 4 DXCM DEXCOM INC
Common Stock
A - Award 5,586 85,616 6.98
2024-12-17 2024-12-16 4 DXCM DEXCOM INC
Common Stock
S - Sale -744 80,030 -0.92 76.87 -57,191 6,151,906
2024-11-18 2024-11-15 4 DXCM DEXCOM INC
Common Stock
S - Sale X -3,500 80,774 -4.15 75.51 -264,285 6,099,245
2024-09-11 2024-09-09 4 DXCM DEXCOM INC
Common Stock
S - Sale -746 84,274 -0.88 69.15 -51,586 5,827,547
2024-06-11 2024-06-10 4 DXCM DEXCOM INC
Common Stock
S - Sale -745 84,948 -0.87 115.05 -85,713 9,773,335
2024-03-14 2024-03-12 4 DXCM DEXCOM INC
Common Stock
S - Sale -11,661 85,534 -12.00 134.41 -1,567,363 11,496,685
2024-03-11 2024-03-08 4 DXCM DEXCOM INC
Common Stock
A - Award 26,053 97,195 36.62
2024-02-21 2024-02-20 4 DXCM DEXCOM INC
Common Stock
S - Sale X -3,363 71,142 -4.51 116.73 -392,563 8,304,406
2024-01-17 2024-01-16 4 DXCM DEXCOM INC
Common Stock
S - Sale -2,734 74,505 -3.54 123.63 -338,018 9,211,411
2024-01-17 2024-01-12 4 DXCM DEXCOM INC
Common Stock
A - Award 7,171 77,239 10.23 0.00 7 77
2023-12-19 2023-12-18 4 DXCM DEXCOM INC
Common Stock
D - Sale to Issuer -2,932 70,068 -4.02 121.85 -357,261 8,537,709
2023-08-22 2023-08-22 4 DXCM DEXCOM INC
Common Stock
S - Sale X -1,844 72,867 -2.47 104.38 -192,477 7,605,857
2023-05-23 2023-05-22 4 DXCM DEXCOM INC
Common Stock
S - Sale X -2,400 74,711 -3.11 117.58 -282,192 8,784,519
2023-03-14 2023-03-10 4 DXCM DEXCOM INC
Common Stock
D - Sale to Issuer -783 77,111 -1.01 111.40 -87,225 8,590,088
2023-03-14 2023-03-10 4 DXCM DEXCOM INC
Common Stock
D - Sale to Issuer -1,857 77,894 -2.33 111.40 -206,868 8,677,314
2023-03-14 2023-03-10 4 DXCM DEXCOM INC
Common Stock
D - Sale to Issuer -3,604 79,751 -4.32 111.40 -401,482 8,884,182
2023-03-14 2023-03-10 4 DXCM DEXCOM INC
Common Stock
D - Sale to Issuer -3,374 83,355 -3.89 111.40 -375,860 9,285,664
2023-03-10 2023-03-08 4 DXCM DEXCOM INC
Common Stock
A - Award 21,769 86,729 33.51 0.00 22 87
2023-02-22 2023-02-22 4 DXCM DEXCOM INC
Common Stock
S - Sale X -2,400 64,837 -3.57 114.54 -274,896 7,426,430
2022-11-22 2022-11-21 4 DXCM DEXCOM INC
Common Stock
S - Sale X -2,400 67,237 -3.45 112.62 -270,288 7,572,231
2022-06-06 2022-06-06 4 DXCM DEXCOM INC
Common Stock
S - Sale X -600 17,408 -3.33 301.57 -180,942 5,249,731
2022-03-10 2022-03-09 4 DXCM DEXCOM INC
Common Stock
D - Sale to Issuer -192 18,008 -1.05 406.06 -77,963 7,312,269
2022-03-10 2022-03-09 4 DXCM DEXCOM INC
Common Stock
D - Sale to Issuer -424 18,200 -2.28 406.06 -172,168 7,390,232
2022-03-10 2022-03-09 4 DXCM DEXCOM INC
Common Stock
D - Sale to Issuer -844 18,624 -4.34 406.06 -342,712 7,562,400
2022-03-10 2022-03-09 4 DXCM DEXCOM INC
Common Stock
D - Sale to Issuer -491 19,468 -2.46 406.06 -199,374 7,905,112
2022-03-10 2022-03-08 4 DXCM DEXCOM INC
Common Stock
A - Award 5,297 19,959 36.13 0.00 5 20
2022-03-04 2022-03-04 4 DXCM DEXCOM INC
Common Stock
S - Sale X -600 14,662 -3.93 422.94 -253,764 6,201,146
2021-12-17 2021-12-15 4 DXCM DEXCOM INC
Common Stock
A - Award 2,925 15,217 23.80 0.00 3 15
2021-12-06 2021-12-06 4 DXCM DEXCOM INC
Common Stock
S - Sale X -600 12,292 -4.65 517.59 -310,554 6,362,216
2021-11-10 2021-11-09 4 DXCM DEXCOM INC
Common Stock
A - Award -634 12,892 -4.69 634.12 -402,032 8,175,075
2021-09-13 2021-09-09 4 DXCM DEXCOM INC
Common Stock
S - Sale -5 13,526 -0.04 541.76 -2,709 7,327,846
2021-09-13 2021-09-09 4 DXCM DEXCOM INC
Common Stock
S - Sale -402 13,531 -2.89 541.36 -217,627 7,325,142
2021-09-08 2021-09-07 4 DXCM DEXCOM INC
Common Stock
S - Sale X -587 13,933 -4.04 545.41 -320,156 7,599,198
2021-05-26 2021-05-24 4 DXCM DEXCOM INC
Common Stock
S - Sale X -600 14,508 -3.97 346.74 -208,044 5,030,504
2021-03-12 2021-03-10 4 DXCM DEXCOM INC
Common Stock
S - Sale -941 15,108 -5.86 362.92 -341,505 5,482,950
2021-03-10 2021-03-08 4 DXCM DEXCOM INC
Common Stock
A - Award 5,301 16,049 49.32 0.00 5 16
2021-02-26 2021-02-24 4 DXCM DEXCOM INC
Common Stock
S - Sale X -600 10,700 -5.31 404.00 -242,400 4,322,800
2020-11-25 2020-11-24 4 DXCM DEXCOM INC
Common Stock
S - Sale X -600 11,300 -5.04 320.37 -192,222 3,620,181
2020-11-12 2020-11-10 4 DXCM DEXCOM INC
Common Stock
S - Sale -632 11,900 -5.04 336.22 -212,491 4,001,026
2020-09-11 2020-09-09 4 DXCM DEXCOM INC
Common Stock
S - Sale -289 12,532 -2.25 398.30 -115,109 4,991,521
2020-08-26 2020-08-24 4 DXCM DEXCOM INC
Common Stock
S - Sale X -600 12,817 -4.47 427.41 -256,446 5,478,114
2020-03-13 2020-03-11 4 DXCM DEXCOM INC
Common Stock
S - Sale -589 13,417 -4.21 265.43 -156,336 3,561,221
2020-03-13 2020-03-11 4 DXCM DEXCOM INC
Common Stock
S - Sale -24 14,006 -0.17 250.16 -6,004 3,503,789
2020-03-10 3 DXCM DEXCOM INC
Common Stock
17,094
2020-03-10 3 DXCM DEXCOM INC
Common Stock
17,094
2020-03-10 3 DXCM DEXCOM INC
Common Stock
17,094
2020-03-10 2020-03-08 4 DXCM DEXCOM INC
Common Stock
A - Award 5,483 14,030 64.15 0.00 5 14
2018-02-05 2018-02-01 4 NUVA NUVASIVE INC
RSUs
M - Exercise -931 931 -50.00
2018-02-05 2018-02-01 4 NUVA NUVASIVE INC
Common Stock
F - Taxes -380 7,943 -4.57 48.50 -18,430 385,236
2018-02-05 2018-02-01 4 NUVA NUVASIVE INC
Common Stock
M - Exercise 931 8,323 12.59
2017-07-05 2017-07-01 4 NUVA NUVASIVE INC
RSUs
D - Sale to Issuer 2,091 2,091
2017-07-05 2017-07-01 4 NUVA NUVASIVE INC
Common Stock
F - Taxes -785 7,392 -9.60 76.92 -60,382 568,593
2017-07-05 2017-07-01 4 NUVA NUVASIVE INC
Common Stock
M - Exercise 2,091 8,177 34.36
2017-02-10 2017-02-08 4 NUVA NUVASIVE INC
PRSUs
A - Award 3,951 3,951
2017-02-03 2017-02-01 4 NUVA NUVASIVE INC
RSUs
M - Exercise -931 1,862 -33.33
2017-02-03 2017-02-01 4 NUVA NUVASIVE INC
Common Stock
F - Taxes -407 5,657 -6.71 70.76 -28,799 400,289
2017-02-03 2017-02-01 4 NUVA NUVASIVE INC
Common Stock
M - Exercise 931 6,064 18.14
2016-08-03 3 NUVA NUVASIVE INC
Common Stock
10,266
2016-08-03 3 NUVA NUVASIVE INC
Common Stock
10,266
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)