| 2022-02-23 | VOCERA COMMUNICATIONS, INC. | D | −45.1K sh | — | — | 0 |
| 2022-01-18 | VOCERA COMMUNICATIONS, INC. | S | ▼−8,000 sh | $78.98 | ▼−$632K | 45,066 |
| 2021-01-12 | VOCERA COMMUNICATIONS, INC. | S | ▼−5,732 sh | $43.40 | ▼−$249K | 49,955 |
| 2021-01-12 | VOCERA COMMUNICATIONS, INC. | S | ▼−1,268 sh | $44.41 | ▼−$56.3K | 48,687 |
| 2020-12-04 | VOCERA COMMUNICATIONS, INC. | G | −735 sh | — | — | 55,687 |
| 2020-09-30 | GTT Communications, Inc. | A | +4,603 sh | $5.16 | +$23.8K | 286,368 |
| 2020-07-01 | VOCERA COMMUNICATIONS, INC. | A | +4,379 sh | — | — | 53,066 |
| 2020-07-01 | GTT Communications, Inc. | A | +9,309 sh | — | — | 281,765 |
| 2020-07-01 | GTT Communications, Inc. | A | +22K sh | — | — | 294,441 |
| 2020-06-30 | GTT Communications, Inc. | A | +2,911 sh | $8.16 | +$23.8K | 272,456 |
| 2020-06-01 | VOCERA COMMUNICATIONS, INC. | A | +7,708 sh | — | — | 56,422 |
| 2020-03-31 | GTT Communications, Inc. | A | +2,988 sh | $7.95 | +$23.8K | 269,545 |
| 2019-12-31 | GTT Communications, Inc. | A | +2,093 sh | $11.35 | +$23.8K | 266,557 |
| 2019-09-30 | GTT Communications, Inc. | A | +2,522 sh | $9.42 | +$23.8K | 264,464 |
| 2019-08-28 | GTT Communications, Inc. | P | ▲+2,850 sh | $8.81 | ▲+$25.1K | 261,942 |
| 2019-07-01 | GTT Communications, Inc. | A | +9,309 sh | — | — | 259,092 |
| 2019-06-30 | GTT Communications, Inc. | A | +1,350 sh | $17.60 | +$23.8K | 249,783 |
| 2019-06-14 | VOCERA COMMUNICATIONS, INC. | G | −2,050 sh | — | — | 48,714 |
| 2019-06-07 | VOCERA COMMUNICATIONS, INC. | S | ▼−600 sh | $30.73 | ▼−$18.4K | 51,664 |
| 2019-06-07 | VOCERA COMMUNICATIONS, INC. | S | ▼−800 sh | $32.23 | ▼−$25.8K | 50,864 |
| 2019-06-07 | VOCERA COMMUNICATIONS, INC. | S | ▼−100 sh | $32.80 | ▼−$3,280 | 50,764 |
| 2019-05-31 | VOCERA COMMUNICATIONS, INC. | A | −4,333 sh | — | — | 52,264 |
| 2019-03-29 | GTT Communications, Inc. | A | +685 sh | $34.70 | +$23.8K | 248,433 |
| 2019-03-07 | VOCERA COMMUNICATIONS, INC. | S | ▼−1,500 sh | $32.53 | ▼−$48.8K | 47,931 |
| 2018-12-31 | GTT Communications, Inc. | A | +1,004 sh | $23.66 | +$23.8K | 247,748 |
| 2018-12-07 | VOCERA COMMUNICATIONS, INC. | S | ▼−1,500 sh | $39.61 | ▼−$59.4K | 49,431 |
| 2018-10-30 | VOCERA COMMUNICATIONS, INC. | S | ▼−13K sh | $35.82 | ▼−$466K | 50,931 |
| 2018-09-28 | GTT Communications, Inc. | A | +548 sh | $43.40 | +$23.8K | 246,744 |
| 2018-09-07 | VOCERA COMMUNICATIONS, INC. | S | ▼−1,500 sh | $33.89 | ▼−$50.8K | 63,931 |
| 2018-07-01 | GTT Communications, Inc. | A | +3,889 sh | — | — | 246,196 |
| 2018-06-30 | GTT Communications, Inc. | A | +378 sh | $45.00 | +$17K | 242,307 |
| 2018-06-01 | VOCERA COMMUNICATIONS, INC. | A | +5,600 sh | — | — | 65,431 |
| 2018-03-31 | GTT Communications, Inc. | A | +300 sh | $56.70 | +$17K | 241,929 |
| 2017-12-14 | VOCERA COMMUNICATIONS, INC. | G | −4,455 sh | — | — | 59,831 |
| 2017-09-30 | GTT Communications, Inc. | A | +538 sh | $31.65 | +$17K | 241,266 |
| 2017-08-01 | GTT Communications, Inc. | S | ▼−6,000 sh | $30.32 | ▼−$182K | 240,728 |
| 2017-07-03 | GTT Communications, Inc. | S | ▼−6,000 sh | $30.97 | ▼−$186K | 240,692 |
| 2017-07-01 | GTT Communications, Inc. | A | +5,530 sh | $31.65 | +$175K | 246,728 |
| 2017-07-01 | GTT Communications, Inc. | A | +506 sh | $31.65 | +$16K | 241,198 |
| 2017-06-15 | Sonus, Inc. | A | +19.8K sh | — | — | 89,412 |
| 2017-06-01 | VOCERA COMMUNICATIONS, INC. | A | +5,285 sh | — | — | 64,286 |
| 2017-06-01 | GTT Communications, Inc. | S | ▼−6,000 sh | $32.84 | ▼−$197K | 246,692 |
| 2017-05-10 | GTT Communications, Inc. | S | ▼−12K sh | $30.00 | ▼−$360K | 252,692 |
| 2017-05-10 | GTT Communications, Inc. | S | ▼−12K sh | $30.00 | ▼−$360K | 252,692 |
| 2017-03-31 | GTT Communications, Inc. | A | +658 sh | $24.35 | +$16K | 264,692 |
| 2017-03-13 | VOCERA COMMUNICATIONS, INC. | S | ▼−10K sh | $22.65 | ▼−$227K | 59,001 |
| 2016-12-31 | GTT Communications, Inc. | A | +557 sh | $28.75 | +$16K | 264,034 |
| 2016-11-09 | VOCERA COMMUNICATIONS, INC. | G | −3,228 sh | — | — | 69,001 |
| 2016-09-30 | GTT Communications, Inc. | A | +680 sh | $23.53 | +$16K | 263,477 |
| 2016-07-01 | GTT Communications, Inc. | A | +6,945 sh | $18.00 | +$125K | 262,797 |