NASDAQ:CSPI | Historical Stock Price | CSP INC /MA/

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1982-01-29 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$1.18$2.32$4.56$8.97$17.61$34.601982-01-292026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2020

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2020-12-31$3.87$6.0963,600——
2020-12-30$3.90$6.1454,000——
2020-12-29$3.90$6.1467,800——
2020-12-28$3.94$6.2160,800——
2020-12-24$3.90$6.1422,600——
2020-12-23$3.90$6.1410,600——
2020-12-22$3.91$6.16156,600——
2020-12-21$3.75$5.9110,800——
2020-12-18$3.75$5.9013,000——
2020-12-17$3.92$6.1818,000——
2020-12-16$3.91$6.156,400——
2020-12-15$3.94$6.2112,000——
2020-12-14$3.97$6.259,200——
2020-12-11$3.96$6.247,000——
2020-12-10$3.95$6.223,000——
2020-12-09$3.94$6.2024,800——
2020-12-08$3.97$6.2512,000——
2020-12-07$3.78$5.959,000——
2020-12-04$3.85$6.0610,600——
2020-12-03$3.78$5.968,000——
2020-12-02$3.75$5.9119,200——
2020-12-01$3.81$5.9922,200——
2020-11-30$4.00$6.291,400——
2020-11-27$4.03$6.359,600——
2020-11-25$4.10$6.464,200——
2020-11-24$4.11$6.4726,400——
2020-11-23$4.07$6.411,800——
2020-11-20$4.01$6.3110,600——
2020-11-19$3.93$6.181,800——
2020-11-18$3.88$6.119,800——
2020-11-17$3.86$6.0815,400——
2020-11-16$3.88$6.114,600——
2020-11-13$3.88$6.111,200——
2020-11-12$3.78$5.969,800——
2020-11-11$3.86$6.084,000——
2020-11-10$3.75$5.903,200——
2020-11-09$3.68$5.808,400——
2020-11-06$3.59$5.6517,800——
2020-11-05$3.83$6.038,200——
2020-11-04$3.82$6.022,000——
2020-11-03$3.82$6.025,200——
2020-11-02$3.90$6.1411,000——
2020-10-30$3.55$5.5914,600——
2020-10-29$3.69$5.814,000——
2020-10-28$3.72$5.857,600——
2020-10-27$3.87$6.092,000——
2020-10-26$3.67$5.7828,000——
2020-10-23$3.87$6.0914,400——
2020-10-22$3.93$6.182,800——
2020-10-21$3.94$6.211,800——
2020-10-20$3.94$6.215,800——
2020-10-19$3.95$6.2227,000——
2020-10-16$4.17$6.577,800——
2020-10-15$4.20$6.622,000——
2020-10-14$4.31$6.797,000——
2020-10-13$4.31$6.784,200——
2020-10-12$4.25$6.704,400——
2020-10-09$4.23$6.665,800——
2020-10-08$4.36$6.862,800——
2020-10-07$4.20$6.621,400——
2020-10-06$4.18$6.583,000——
2020-10-05$4.26$6.711,400——
2020-10-02$4.28$6.744,400——
2020-10-01$4.26$6.712,400——
2020-09-30$4.32$6.8033,600——
2020-09-29$4.38$6.902,200——
2020-09-28$4.42$6.964,400——
2020-09-25$4.50$7.092,000——
2020-09-24$4.39$6.911,000——
2020-09-23$4.42$6.961,200——
2020-09-22$4.53$7.13800——
2020-09-21$4.38$6.902,200——
2020-09-18$4.45$7.006,000——
2020-09-17$4.39$6.9113,800——
2020-09-16$4.37$6.897,200——
2020-09-15$4.49$7.073,800——
2020-09-14$4.59$7.221,600——
2020-09-11$4.33$6.821,600——
2020-09-10$4.48$7.051,600——
2020-09-09$4.45$7.002,800——
2020-09-08$4.43$6.984,000——
2020-09-04$4.45$7.002,000——
2020-09-03$4.39$6.914,200——
2020-09-02$4.65$7.3313,800——
2020-09-01$4.80$7.557,400——
2020-08-31$4.85$7.642,400——
2020-08-28$4.75$7.482,200——
2020-08-27$4.75$7.485,800——
2020-08-26$4.88$7.6817,000——
2020-08-25$4.85$7.649,400——
2020-08-24$4.86$7.667,000——
2020-08-21$4.71$7.412,200——
2020-08-20$4.74$7.466,800——
2020-08-19$4.76$7.5022,400——
2020-08-18$4.91$7.7416,200——
2020-08-17$4.88$7.6848,800——
2020-08-14$4.66$7.3322,200——
2020-08-13$4.12$6.4812,000——
2020-08-12$3.95$6.2223,600——
2020-08-11$3.79$5.9723,600——
2020-08-10$3.83$6.031,400——
2020-08-07$3.90$6.1412,200——
2020-08-06$3.95$6.22600——
2020-08-05$3.92$6.184,600——
2020-08-04$3.70$5.8212,800——
2020-08-03$3.83$6.031,800——
2020-07-31$3.72$5.8616,800——
2020-07-30$3.69$5.812,000——
2020-07-29$3.75$5.9011,400——
2020-07-28$3.68$5.8019,400——
2020-07-27$3.79$5.961,000——
2020-07-24$3.78$5.952,200——
2020-07-23$3.77$5.933,200——
2020-07-22$3.77$5.944,400——
2020-07-21$3.82$6.022,000——
2020-07-20$3.79$5.968,400——
2020-07-17$3.79$5.963,600——
2020-07-16$3.86$6.075,400——
2020-07-15$3.87$6.103,600——
2020-07-14$3.88$6.118,000——
2020-07-13$3.90$6.144,800——
2020-07-10$3.97$6.259,400——
2020-07-09$3.93$6.181,200——
2020-07-08$3.97$6.2512,200——
2020-07-07$4.16$6.5514,600——
2020-07-06$4.04$6.372,200——
2020-07-02$4.04$6.365,400——
2020-07-01$4.12$6.483,400——
2020-06-30$4.14$6.513,600——
2020-06-29$4.03$6.3517,800——
2020-06-26$3.95$6.227,400——
2020-06-25$4.06$6.4011,000——
2020-06-24$4.01$6.321,200——
2020-06-23$4.19$6.6014,000——
2020-06-22$4.26$6.7118,800——
2020-06-19$4.34$6.833,600——
2020-06-18$4.51$7.106,200——
2020-06-17$4.40$6.9223,400——
2020-06-16$4.89$7.708,000——
2020-06-15$4.17$6.575,800——
2020-06-12$4.18$6.585,400——
2020-06-11$4.14$6.528,800——
2020-06-10$4.12$6.484,000——
2020-06-09$4.25$6.703,600——
2020-06-08$4.16$6.5510,200——
2020-06-05$4.01$6.3225,200——
2020-06-04$4.10$6.4614,000——
2020-06-03$4.01$6.3210,200——
2020-06-02$3.88$6.115,400——
2020-06-01$3.88$6.112,400——
2020-05-29$3.90$6.142,600——
2020-05-28$3.98$6.261,600——
2020-05-27$4.13$6.507,600——
2020-05-26$4.01$6.328,800——
2020-05-22$3.99$6.294,200——
2020-05-21$3.93$6.189,400——
2020-05-20$4.17$6.577,800——
2020-05-19$3.98$6.2611,800——
2020-05-18$3.81$5.9925,400——
2020-05-15$4.01$6.3219,200——
2020-05-14$3.98$6.2698,000——
2020-05-13$5.10$8.043,400——
2020-05-12$5.30$8.356,800——
2020-05-11$5.04$7.934,400——
2020-05-08$5.19$8.174,600——
2020-05-07$5.08$8.002,200——
2020-05-06$5.19$8.181,600——
2020-05-05$4.95$7.793,800——
2020-05-04$4.93$7.766,800——
2020-05-01$5.09$8.0113,200——
2020-04-30$5.42$8.546,000——
2020-04-29$5.29$8.3316,200——
2020-04-28$5.51$8.686,600——
2020-04-27$5.48$8.6346,200——
2020-04-24$5.63$8.8618,400——
2020-04-23$5.30$8.3515,800——
2020-04-22$4.97$7.835,600——
2020-04-21$4.85$7.638,600——
2020-04-20$4.71$7.413,800——
2020-04-17$4.80$7.551,000——
2020-04-16$4.52$7.129,000——
2020-04-15$4.45$7.011,600——
2020-04-14$4.69$7.3910,200——
2020-04-13$4.55$7.173,200——
2020-04-09$4.36$6.8714,200——
2020-04-08$4.00$6.301,400——
2020-04-07$3.84$6.0515,800——
2020-04-06$3.32$5.225,200——
2020-04-03$3.23$5.092,800——
2020-04-02$3.20$5.043,200——
2020-04-01$3.23$5.0819,200——
2020-03-31$3.50$5.517,800——
2020-03-30$3.42$5.383,200——
2020-03-27$3.43$5.404,800——
2020-03-26$3.35$5.286,800——
2020-03-25$3.33$5.2411,600——
2020-03-24$3.29$5.1813,000——
2020-03-23$2.95$4.659,400——
2020-03-20$2.75$4.3218,600——
2020-03-19$2.80$4.4050,800——
2020-03-18$2.51$3.9535,000——
2020-03-17$3.08$4.8431,400——
2020-03-16$3.00$4.7318,400——
2020-03-13$4.01$6.3210,400——
2020-03-12$4.68$7.3723,200——
2020-03-11$5.07$7.9920,600——
2020-03-10$5.30$8.3517,800——
2020-03-09$5.66$8.911,000——
2020-03-06$5.86$9.235,000——
2020-03-05$6.15$9.6910,000——
2020-03-04$6.60$10.399,000——
2020-03-03$6.41$10.1015,000——
2020-03-02$6.67$10.5021,200——
2020-02-28$6.76$10.6537,200——
2020-02-27$6.58$10.367,800——
2020-02-26$6.84$10.657,600——
2020-02-25$6.70$10.447,200——
2020-02-24$6.83$10.646,400——
2020-02-21$7.13$11.100——
2020-02-20$7.13$11.103,200——
2020-02-19$7.04$10.9619,000——
2020-02-18$7.14$11.1314,600——
2020-02-14$6.94$10.8144,200——
2020-02-13$6.73$10.4812,600——
2020-02-12$6.67$10.392,800——
2020-02-11$6.67$10.391,800——
2020-02-10$6.65$10.368,000——
2020-02-07$6.80$10.602,000——
2020-02-06$6.91$10.773,200——
2020-02-05$7.05$10.991,200——
2020-02-04$6.91$10.7611,600——
2020-02-03$7.25$11.300——
2020-01-31$7.25$11.301,600——
2020-01-30$7.22$11.251,400——
2020-01-29$7.14$11.122,800——
2020-01-28$7.00$10.912,600——
2020-01-27$6.64$10.3414,200——
2020-01-24$7.28$11.3412,000——
2020-01-23$7.29$11.3522,400——
2020-01-22$7.25$11.306,800——
2020-01-21$7.48$11.6633,800——
2020-01-17$6.65$10.364,000——
2020-01-16$6.56$10.226,600——
2020-01-15$6.48$10.097,600——
2020-01-14$6.45$10.056,400——
2020-01-13$6.57$10.2312,000——
2020-01-10$6.50$10.1318,000——
2020-01-09$6.57$10.2456,000——
2020-01-08$6.52$10.1692,400——
2020-01-07$6.62$10.3217,000——
2020-01-06$6.55$10.209,000——
2020-01-03$6.56$10.21600——
2020-01-02$6.71$10.462,600——