| 2017-07-28 | Discover Financial Services | G | −8,365 sh | — | — | 69,850 |
| 2017-04-27 | Discover Financial Services | S | ▼−9,500 sh | $64.34 | ▼−$611K | 78,215 |
| 2017-02-22 | Discover Financial Services | A | +9,133 sh | — | — | 87,715 |
| 2017-02-02 | Discover Financial Services | S | ▼−5,000 sh | $68.06 | ▼−$340K | 70,021 |
| 2017-02-02 | Discover Financial Services | S | ▼−5,000 sh | $68.06 | ▼−$340K | 78,582 |
| 2017-02-01 | Discover Financial Services | A | +14.5K sh | $68.77 | +$997K | 89,006 |
| 2017-02-01 | Discover Financial Services | F | −14K sh | $68.77 | −$962K | 75,021 |
| 2017-02-01 | Discover Financial Services | A | +23.1K sh | $68.77 | +$1.59M | 97,567 |
| 2017-02-01 | Discover Financial Services | F | −14K sh | $68.77 | −$962K | 83,582 |
| 2017-01-31 | Discover Financial Services | S | ▼−5,000 sh | $69.28 | ▼−$346K | 74,505 |
| 2017-01-27 | Discover Financial Services | S | ▼−5,000 sh | $69.06 | ▼−$345K | 79,505 |
| 2017-01-26 | Discover Financial Services | S | ▼−5,000 sh | $69.35 | ▼−$347K | 84,505 |
| 2016-02-03 | Discover Financial Services | S | ▼−5,000 sh | $44.27 | ▼−$221K | 94,505 |
| 2016-02-03 | Discover Financial Services | S | ▼−5,000 sh | $45.40 | ▼−$227K | 89,505 |
| 2016-02-02 | Discover Financial Services | S | ▼−5,000 sh | $45.05 | ▼−$225K | 99,505 |
| 2016-02-01 | Discover Financial Services | A | +46.3K sh | — | — | 135,104 |
| 2016-02-01 | Discover Financial Services | F | −25.6K sh | $46.05 | −$1.18M | 109,505 |
| 2016-02-01 | Discover Financial Services | S | ▼−5,000 sh | $46.24 | ▼−$231K | 104,505 |
| 2016-01-22 | Discover Financial Services | A | +13.4K sh | — | — | 88,820 |
| 2016-01-02 | Discover Financial Services | F | −1,845 sh | $53.62 | −$98.9K | 75,443 |
| 2015-10-22 | Discover Financial Services | S | ▼−20K sh | $55.93 | ▼−$1.12M | 77,288 |
| 2015-02-01 | Discover Financial Services | F | −4,825 sh | $54.38 | −$262K | 97,288 |
| 2015-01-26 | Discover Financial Services | S | ▼−46.7K sh | $56.42 | ▼−$2.63M | 102,113 |
| 2015-01-22 | Discover Financial Services | A | +11.3K sh | — | — | 148,790 |
| 2015-01-02 | Discover Financial Services | A | +59.2K sh | — | — | 169,230 |
| 2015-01-02 | Discover Financial Services | F | −31.8K sh | $65.36 | −$2.08M | 137,450 |
| 2014-02-01 | Discover Financial Services | F | −3,059 sh | $53.65 | −$164K | 110,006 |
| 2014-01-28 | Discover Financial Services | S | ▼−40K sh | $54.71 | ▼−$2.19M | 113,065 |
| 2014-01-22 | Discover Financial Services | A | +12.8K sh | — | — | 153,065 |
| 2014-01-03 | Discover Financial Services | A | +66.6K sh | — | — | 180,049 |
| 2014-01-03 | Discover Financial Services | F | −39.8K sh | $55.36 | −$2.2M | 140,253 |
| 2013-08-02 | Discover Financial Services | S | ▼−40K sh | $50.78 | ▼−$2.03M | 113,417 |
| 2013-01-22 | Discover Financial Services | A | +20.6K sh | — | — | 149,647 |
| 2013-01-04 | Discover Financial Services | F | −17.1K sh | $39.53 | −$676K | 129,076 |
| 2012-06-29 | Discover Financial Services | S | ▼−40K sh | $34.26 | ▼−$1.37M | 146,179 |
| 2012-03-23 | Discover Financial Services | M | +4,903 sh | $26.68 | +$131K | 231,082 |
| 2012-03-23 | Discover Financial Services | S | ▼−4,903 sh | $32.31 | ▼−$158K | 226,179 |
| 2012-03-23 | Discover Financial Services | S | ▼−40K sh | $33.17 | ▼−$1.33M | 186,179 |
| 2012-03-23 | Discover Financial Services | M | −4,903 sh | — | — | 0 |
| 2012-01-06 | Discover Financial Services | F | −12.1K sh | $24.00 | −$290K | 226,179 |
| 2011-12-09 | Discover Financial Services | A | +25.7K sh | — | — | 242,087 |
| 2011-12-09 | Discover Financial Services | F | −3,844 sh | $23.97 | −$92.1K | 238,243 |
| 2011-09-26 | Discover Financial Services | M | +14.3K sh | $18.87 | +$270K | 230,728 |
| 2011-09-26 | Discover Financial Services | S | ▼−14.3K sh | $25.05 | ▼−$358K | 216,423 |
| 2011-07-08 | Discover Financial Services | F | −7,400 sh | $26.55 | −$196K | 216,423 |
| 2011-06-27 | Discover Financial Services | M | −14.3K sh | — | — | 0 |
| 2011-06-27 | Discover Financial Services | M | +95.6K sh | $18.05 | +$1.73M | 319,416 |
| 2011-06-27 | Discover Financial Services | S | ▼−95.6K sh | $24.83 | ▼−$2.37M | 223,823 |
| 2011-06-27 | Discover Financial Services | M | −95.6K sh | — | — | 0 |
| 2011-03-25 | Discover Financial Services | S | ▼−12.5K sh | $23.95 | ▼−$300K | 223,823 |