| 2018-09-12 | First Financial Northwest, Inc. | S | ▼−2,765 sh | $17.11 | ▼−$47.3K | 71,235 |
| 2018-09-11 | First Financial Northwest, Inc. | S | ▼−6,967 sh | $17.16 | ▼−$120K | 74,000 |
| 2018-09-10 | First Financial Northwest, Inc. | S | ▼−5,442 sh | $17.22 | ▼−$93.7K | 80,967 |
| 2018-06-13 | First Financial Northwest, Inc. | A | +1,532 sh | $19.98 | +$30.6K | 86,409 |
| 2017-06-14 | First Financial Northwest, Inc. | A | +1,739 sh | $17.25 | +$30K | 84,877 |
| 2017-05-26 | First Financial Northwest, Inc. | M | +18.3K sh | $9.78 | +$179K | 101,478 |
| 2017-05-26 | First Financial Northwest, Inc. | S | ▼−18.3K sh | $15.95 | ▼−$293K | 83,138 |
| 2017-05-26 | First Financial Northwest, Inc. | M | −18.3K sh | — | — | 0 |
| 2017-02-13 | First Financial Northwest, Inc. | M | +14.9K sh | $9.78 | +$146K | 98,038 |
| 2017-02-13 | First Financial Northwest, Inc. | S | ▼−14.9K sh | $20.07 | ▼−$299K | 83,138 |
| 2017-02-13 | First Financial Northwest, Inc. | M | −14.9K sh | — | — | 18,340 |
| 2017-02-10 | First Financial Northwest, Inc. | M | +20.6K sh | $9.78 | +$201K | 103,738 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−103 sh | $20.03 | ▼−$2,063.09 | 103,635 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−400 sh | $20.01 | ▼−$8,004 | 103,235 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−2,753 sh | $20.00 | ▼−$55.1K | 100,482 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−100 sh | $19.94 | ▼−$1,994 | 100,382 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−8 sh | $19.92 | ▼−$159.36 | 100,374 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−3,217 sh | $19.91 | ▼−$64.1K | 97,157 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−3,881 sh | $19.90 | ▼−$77.2K | 93,276 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−883 sh | $19.89 | ▼−$17.6K | 92,393 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−1,400 sh | $19.88 | ▼−$27.8K | 90,993 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−1,751 sh | $19.87 | ▼−$34.8K | 89,242 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−4,600 sh | $19.86 | ▼−$91.4K | 84,642 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−400 sh | $19.85 | ▼−$7,940 | 84,242 |
| 2017-02-10 | First Financial Northwest, Inc. | S | ▼−1,104 sh | $19.84 | ▼−$21.9K | 83,138 |
| 2017-02-10 | First Financial Northwest, Inc. | M | −20.6K sh | — | — | 33,240 |
| 2017-02-09 | First Financial Northwest, Inc. | M | +24.1K sh | $9.78 | +$236K | 107,238 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−306 sh | $20.40 | ▼−$6,242.4 | 106,932 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−100 sh | $20.36 | ▼−$2,036 | 196,832 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−1,500 sh | $20.35 | ▼−$30.5K | 105,332 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−400 sh | $20.32 | ▼−$8,128 | 104,932 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−600 sh | $20.31 | ▼−$12.2K | 104,332 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−900 sh | $20.30 | ▼−$18.3K | 103,432 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−4,600 sh | $20.28 | ▼−$93.3K | 98,832 |
| 2017-02-09 | First Financial Northwest, Inc. | P | ▲−100 sh | $20.27 | ▲−$2,027 | 98,732 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−316 sh | $20.26 | ▼−$6,402.16 | 98,416 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−100 sh | $20.21 | ▼−$2,021 | 98,316 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−503 sh | $20.20 | ▼−$10.2K | 97,813 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−800 sh | $20.17 | ▼−$16.1K | 97,013 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−1,200 sh | $20.16 | ▼−$24.2K | 95,813 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−117 sh | $20.15 | ▼−$2,357.55 | 95,696 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−1,311 sh | $20.10 | ▼−$26.4K | 94,385 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−3,574 sh | $20.08 | ▼−$71.8K | 90,811 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−302 sh | $20.07 | ▼−$6,061.14 | 90,509 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−3,990 sh | $20.05 | ▼−$80K | 86,519 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−883 sh | $20.04 | ▼−$17.7K | 85,636 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−904 sh | $20.03 | ▼−$18.1K | 84,732 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼+100 sh | $20.02 | ▼+$2,002.5 | 84,632 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−672 sh | $20.02 | ▼−$13.5K | 83,960 |
| 2017-02-09 | First Financial Northwest, Inc. | S | ▼−288 sh | $20.01 | ▼−$5,762.88 | 83,672 |