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 — 1989

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1989-12-29$2.16$2.162,396——
1989-12-28$2.35$2.3513,310——
1989-12-27$2.16$2.161,065——
1989-12-26$2.16$2.16532——
1989-12-22$2.25$2.252,130——
1989-12-21$2.35$2.3528,217——
1989-12-20$2.16$2.1613,842——
1989-12-19$2.25$2.2527,152——
1989-12-18$2.16$2.165,324——
1989-12-15$2.16$2.164,525——
1989-12-14$2.25$2.25266——
1989-12-13$2.16$2.161,863——
1989-12-12$2.21$2.217,454——
1989-12-11$2.25$2.250——
1989-12-08$2.25$2.250——
1989-12-07$2.25$2.251,065——
1989-12-06$2.16$2.1614,641——
1989-12-05$2.25$2.2533,275——
1989-12-04$2.21$2.2113,310——
1989-12-01$2.21$2.217,986——
1989-11-30$2.25$2.2524,224——
1989-11-29$2.39$2.39266——
1989-11-28$2.39$2.391,065——
1989-11-27$2.30$2.3010,648——
1989-11-24$2.30$2.307,986——
1989-11-22$2.30$2.3050,578——
1989-11-21$2.44$2.440——
1989-11-20$2.44$2.440——
1989-11-17$2.44$2.442,662——
1989-11-16$2.44$2.44799——
1989-11-15$2.35$2.352,662——
1989-11-14$2.30$2.301,331——
1989-11-13$2.30$2.301,331——
1989-11-10$2.30$2.302,396——
1989-11-09$2.44$2.44266——
1989-11-08$2.25$2.250——
1989-11-07$2.25$2.250——
1989-11-06$2.25$2.250——
1989-11-03$2.25$2.25799——
1989-11-02$2.44$2.44799——
1989-11-01$2.25$2.251,331——
1989-10-31$2.25$2.25532——
1989-10-30$2.39$2.390——
1989-10-27$2.39$2.399,583——
1989-10-26$2.49$2.49266——
1989-10-25$2.30$2.300——
1989-10-24$2.30$2.300——
1989-10-23$2.30$2.305,856——
1989-10-20$2.49$2.49266——
1989-10-19$2.49$2.49266——
1989-10-18$2.44$2.441,065——
1989-10-17$2.30$2.30266——
1989-10-16$2.30$2.30799——
1989-10-13$2.49$2.490——
1989-10-12$2.49$2.494,792——
1989-10-11$2.35$2.35799——
1989-10-10$2.35$2.350——
1989-10-09$2.35$2.35266——
1989-10-06$2.49$2.490——
1989-10-05$2.49$2.493,993——
1989-10-04$2.35$2.350——
1989-10-03$2.35$2.35799——
1989-10-02$2.35$2.350——
1989-09-29$2.35$2.356,389——
1989-09-28$2.49$2.493,461——
1989-09-27$2.49$2.49266——
1989-09-26$2.35$2.350——
1989-09-25$2.35$2.351,331——
1989-09-22$2.35$2.351,331——
1989-09-21$2.39$2.392,928——
1989-09-20$2.35$2.35266——
1989-09-19$2.35$2.35532——
1989-09-18$2.54$2.540——
1989-09-15$2.54$2.54532——
1989-09-14$2.49$2.49266——
1989-09-13$2.49$2.49532——
1989-09-12$2.39$2.392,396——
1989-09-11$2.35$2.354,525——
1989-09-08$2.39$2.3913,310——
1989-09-07$2.44$2.445,058——
1989-09-06$2.35$2.350——
1989-09-05$2.35$2.35532——
1989-09-01$2.35$2.35799——
1989-08-31$2.49$2.492,396——
1989-08-30$2.44$2.447,986——
1989-08-29$2.35$2.351,597——
1989-08-28$2.49$2.49532——
1989-08-25$2.49$2.49532——
1989-08-24$2.49$2.4935,937——
1989-08-23$2.25$2.25266——
1989-08-22$2.30$2.3018,900——
1989-08-21$2.30$2.309,583——
1989-08-18$2.25$2.252,662——
1989-08-17$2.35$2.351,597——
1989-08-16$2.25$2.250——
1989-08-15$2.25$2.253,727——
1989-08-14$2.25$2.250——
1989-08-11$2.25$2.25532——
1989-08-10$2.35$2.351,331——
1989-08-09$2.25$2.251,065——
1989-08-08$2.30$2.303,194——
1989-08-07$2.35$2.350——
1989-08-04$2.35$2.350——
1989-08-03$2.35$2.35266——
1989-08-02$2.25$2.25266——
1989-08-01$2.30$2.3014,109——
1989-07-31$2.25$2.250——
1989-07-28$2.25$2.251,863——
1989-07-27$2.35$2.35266——
1989-07-26$2.30$2.300——
1989-07-25$2.30$2.301,597——
1989-07-24$2.35$2.35266——
1989-07-21$2.25$2.253,727——
1989-07-20$2.35$2.3527,419——
1989-07-19$2.25$2.25266——
1989-07-18$2.25$2.251,863——
1989-07-17$2.25$2.25266——
1989-07-14$2.35$2.350——
1989-07-13$2.35$2.351,065——
1989-07-12$2.25$2.25532——
1989-07-11$2.25$2.25532——
1989-07-10$2.35$2.35532——
1989-07-07$2.25$2.25266——
1989-07-06$2.39$2.392,662——
1989-07-05$2.25$2.259,583——
1989-07-03$2.25$2.252,662——
1989-06-30$2.25$2.25532——
1989-06-29$2.35$2.353,194——
1989-06-28$2.35$2.3514,641——
1989-06-27$2.30$2.301,863——
1989-06-26$2.30$2.30266——
1989-06-23$2.44$2.443,461——
1989-06-22$2.44$2.44266——
1989-06-21$2.30$2.302,396——
1989-06-20$2.25$2.2511,180——
1989-06-19$2.39$2.391,863——
1989-06-16$2.39$2.390——
1989-06-15$2.39$2.394,525——
1989-06-14$2.35$2.353,461——
1989-06-13$2.25$2.25532——
1989-06-12$2.30$2.304,259——
1989-06-09$2.35$2.355,324——
1989-06-08$2.39$2.39266——
1989-06-07$2.39$2.391,331——
1989-06-06$2.39$2.394,525——
1989-06-05$2.44$2.4454,305——
1989-06-02$2.35$2.355,324——
1989-06-01$2.39$2.392,662——
1989-05-31$2.39$2.3927,419——
1989-05-30$2.44$2.441,331——
1989-05-26$2.44$2.443,461——
1989-05-25$2.30$2.30799——
1989-05-24$2.35$2.355,324——
1989-05-23$2.39$2.395,324——
1989-05-22$2.49$2.49532——
1989-05-19$2.39$2.3938,599——
1989-05-18$2.49$2.49532——
1989-05-17$2.44$2.4447,650——
1989-05-16$2.39$2.390——
1989-05-15$2.39$2.390——
1989-05-12$2.39$2.39532——
1989-05-11$2.39$2.391,065——
1989-05-10$2.39$2.391,065——
1989-05-09$2.39$2.39532——
1989-05-08$2.25$2.253,727——
1989-05-05$2.39$2.391,065——
1989-05-04$2.39$2.39532——
1989-05-03$2.39$2.39799——
1989-05-02$2.30$2.3033,275——
1989-05-01$2.39$2.392,928——
1989-04-28$2.39$2.39532——
1989-04-27$2.39$2.392,130——
1989-04-26$2.39$2.396,123——
1989-04-25$2.39$2.393,727——
1989-04-24$2.39$2.390——
1989-04-21$2.39$2.391,331——
1989-04-20$2.35$2.3520,231——
1989-04-19$2.35$2.3517,303——
1989-04-18$2.30$2.301,331——
1989-04-17$2.30$2.300——
1989-04-14$2.30$2.302,130——
1989-04-13$2.30$2.305,856——
1989-04-12$2.30$2.302,130——
1989-04-11$2.35$2.35266——
1989-04-10$2.35$2.35532——
1989-04-07$2.30$2.301,597——
1989-04-06$2.30$2.302,662——
1989-04-05$2.30$2.3066,018——
1989-04-04$2.25$2.259,051——
1989-04-03$2.30$2.302,928——
1989-03-31$2.30$2.305,324——
1989-03-30$2.39$2.3917,835——
1989-03-29$2.35$2.3534,074——
1989-03-28$2.35$2.355,324——
1989-03-27$2.30$2.306,921——
1989-03-23$2.35$2.35799——
1989-03-22$2.35$2.350——
1989-03-21$2.35$2.353,194——
1989-03-20$2.35$2.353,461——
1989-03-17$2.44$2.44266——
1989-03-16$2.44$2.442,130——
1989-03-15$2.30$2.301,597——
1989-03-14$2.35$2.353,194——
1989-03-13$2.39$2.3921,296——
1989-03-10$2.39$2.394,259——
1989-03-09$2.44$2.442,928——
1989-03-08$2.44$2.442,928——
1989-03-07$2.39$2.3917,835——
1989-03-06$2.39$2.390——
1989-03-03$2.39$2.3923,159——
1989-03-02$2.44$2.4431,145——
1989-03-01$2.39$2.3920,764——
1989-02-28$2.21$2.212,662——
1989-02-27$2.39$2.39532——
1989-02-24$2.25$2.2547,384——
1989-02-23$2.35$2.35799——
1989-02-22$2.35$2.351,065——
1989-02-21$2.35$2.35266——
1989-02-17$2.35$2.351,863——
1989-02-16$2.35$2.359,051——
1989-02-15$2.35$2.3511,713——
1989-02-14$2.35$2.3543,124——
1989-02-13$2.25$2.254,259——
1989-02-10$2.25$2.251,597——
1989-02-09$2.25$2.252,662——
1989-02-08$2.39$2.3940,462——
1989-02-07$2.30$2.30143,748——
1989-02-06$2.25$2.251,331——
1989-02-03$2.25$2.250——
1989-02-02$2.25$2.2526,088——
1989-02-01$2.39$2.390——
1989-01-31$2.39$2.39799——
1989-01-30$2.30$2.301,331——
1989-01-27$2.25$2.253,194——
1989-01-26$2.39$2.391,863——
1989-01-25$2.39$2.3911,180——
1989-01-24$2.25$2.250——
1989-01-23$2.25$2.250——
1989-01-20$2.25$2.251,331——
1989-01-19$2.35$2.352,662——
1989-01-18$2.35$2.3527,152——
1989-01-17$2.35$2.35266——
1989-01-16$2.25$2.25266——
1989-01-13$2.25$2.251,331——
1989-01-12$2.39$2.391,065——
1989-01-11$2.39$2.391,863——
1989-01-10$2.39$2.392,130——
1989-01-09$2.39$2.39266——
1989-01-06$2.39$2.39266——
1989-01-05$2.39$2.391,863——
1989-01-04$2.39$2.39266——
1989-01-03$2.39$2.391,065——