X0306 4 2018-01-04 0 0000764579 CAS MEDICAL SYSTEMS INC CASM 0001601391 Acuta Capital Fund, LP 1301 SHOREWAY ROAD SUITE 350 BELMONT CA 94002 0 0 1 0 Common Stock 2017-01-04 4 P 0 858 1.595 A 2751407 D Common Stock 2017-01-05 4 P 0 411 1.6081 A 2751818 D Common Stock 2017-01-06 4 P 0 4068 1.6151 A 2755886 D Common Stock 2017-01-09 4 P 0 3366 1.6322 A 2759252 D Common Stock 2017-01-10 4 P 0 3360 1.6149 A 2762612 D Common Stock 2017-01-11 4 P 0 8118 1.6528 A 2770730 D Common Stock 2017-01-13 4 P 0 3170 1.715 A 2773900 D Common Stock 2017-01-17 4 P 0 1015 1.7186 A 2774915 D Common Stock 2017-01-18 4 P 0 10829 1.6864 A 2785744 D Common Stock 2017-01-19 4 P 0 38940 1.5998 A 2824684 D Common Stock 2017-01-20 4 P 0 5676 1.5473 A 2830360 D Common Stock 2017-01-27 4 P 0 2640 1.5124 A 2833000 D Common Stock 2017-01-30 4 P 0 2706 1.5146 A 2835706 D Common Stock 2017-01-31 4 P 0 1452 1.5241 A 2837158 D Common Stock 2017-02-02 4 P 0 1876 1.5507 A 2839034 D Common Stock 2017-02-03 4 P 0 15798 1.5311 A 2854832 D Common Stock 2017-02-06 4 P 0 670 1.53 A 2855502 D Common Stock 2017-02-07 4 P 0 2010 1.5127 A 2857512 D Common Stock 2017-02-08 4 P 0 895 1.525 A 2858407 D Common Stock 2017-02-10 4 P 0 1675 1.4995 A 2860082 D Common Stock 2017-02-13 4 P 0 670 1.50 A 2860752 D Common Stock 2017-02-15 4 P 0 1340 1.5095 A 2862092 D Common Stock 2017-02-21 4 P 0 670 1.495 A 2862762 D Common Stock 2017-02-22 4 P 0 4020 1.4933 A 2866782 D Common Stock 2017-02-23 4 P 0 2680 1.465 A 2869462 D Common Stock 2017-02-24 4 P 0 1340 1.49 A 2870802 D Common Stock 2017-02-27 4 P 0 2010 1.4958 A 2872812 D Common Stock 2017-02-28 4 P 0 1639 1.4891 A 2874451 D Common Stock 2017-03-01 4 P 0 23306 1.48 A 2897757 D Common Stock 2017-03-07 4 P 0 4020 1.4478 A 2901777 D The shares were purchased in multiple transactions at prices ranging from $1.58 to $1.60 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.60 to $1.63 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.605 to $1.63 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.63 to $1.64 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.60 to $1.62 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.63 to $1.68 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.69 to $1.72 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.70 to $1.72 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.65 to $1.73 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.59 to $1.60 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.54 to $1.57 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.49 to $1.54 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.51 to $1.52 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.49 to $1.54 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.55 to $1.56 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.51 to $1.56 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.50 to $1.52 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.52 to $1.54 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.49 to $1.50 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.50 to $1.52 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.49 to $1.50 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.48 to $1.50 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.46 to $1.48 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.48 to $1.50 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.48 to $1.51 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The shares were purchased in multiple transactions at prices ranging from $1.44 to $1.45 per share. The price reported reflects the volume weighted average purchase price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price. Due to limitations of the electronic filing system, this Form 4 is being filed in multiple parts. This is part 1 of 4. Acuta Capital Fund, LP, by its general partner, Acuta Capital Partners, LLC, /s/ Manfred Yu, CCO & COO 2018-05-01