IC Identification, part 5 (sensors):

AKM Semiconductor AK09916C 3-axis electronic compass

Ablic (Formerly Seiko Instruments) S-5712CCDL1-I4T1U hall effect sensor

STMicroelectronics LSM6DSL 3-Axis accelerometer/gyroscope

STMicroelectronics LPS22HB pressure sensor

Maxim Integrated MAX86902 heart rate sensor (likely)