NASDAQ:SEIC | Historical Stock Price | SEI INVESTMENTS CO

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
1981-03-25 to 2026-09-04
Data captured

Stock Price Chart

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

$0.18$0.70$2.72$10.58$41.07$159.491981-03-252026-08-27

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

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Historical Stock Price — 1981

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1981-12-31$0.26$0.269,600
1981-12-30$0.25$0.25105,600
1981-12-29$0.25$0.2528,800
1981-12-28$0.25$0.25163,200
1981-12-24$0.26$0.2638,400
1981-12-23$0.26$0.26192,000
1981-12-22$0.26$0.269,600
1981-12-21$0.26$0.2667,200
1981-12-18$0.26$0.26259,200
1981-12-17$0.25$0.25441,600
1981-12-16$0.24$0.24172,800
1981-12-15$0.24$0.24374,400
1981-12-14$0.24$0.241,209,600
1981-12-11$0.26$0.2628,800
1981-12-10$0.26$0.26182,400
1981-12-09$0.26$0.26374,400
1981-12-08$0.26$0.262,208,000
1981-12-07$0.27$0.2719,200
1981-12-04$0.27$0.2748,000
1981-12-03$0.27$0.2776,800
1981-12-02$0.27$0.27220,800
1981-12-01$0.27$0.27268,800
1981-11-30$0.27$0.27873,600
1981-11-27$0.27$0.2767,200
1981-11-25$0.27$0.2786,400
1981-11-24$0.27$0.27768,000
1981-11-23$0.26$0.26163,200
1981-11-20$0.26$0.26163,200
1981-11-19$0.26$0.26614,400
1981-11-18$0.26$0.2657,600
1981-11-17$0.26$0.26336,000
1981-11-16$0.27$0.2796,000
1981-11-13$0.27$0.27134,400
1981-11-12$0.27$0.2796,000
1981-11-11$0.27$0.27124,800
1981-11-10$0.27$0.27259,200
1981-11-09$0.27$0.27192,000
1981-11-06$0.27$0.271,056,000
1981-11-05$0.27$0.27211,200
1981-11-04$0.26$0.26192,000
1981-11-03$0.26$0.2686,400
1981-11-02$0.26$0.26355,200
1981-10-30$0.25$0.2528,800
1981-10-29$0.25$0.25451,200
1981-10-28$0.25$0.25489,600
1981-10-27$0.24$0.24883,200
1981-10-26$0.23$0.23326,400
1981-10-23$0.24$0.24662,400
1981-10-22$0.24$0.24374,400
1981-10-21$0.24$0.2438,400
1981-10-20$0.24$0.24230,400
1981-10-19$0.24$0.2438,400
1981-10-16$0.24$0.24297,600
1981-10-15$0.24$0.24172,800
1981-10-14$0.24$0.24489,600
1981-10-13$0.23$0.23192,000
1981-10-12$0.23$0.23595,200
1981-10-09$0.23$0.23441,600
1981-10-08$0.22$0.22432,000
1981-10-07$0.22$0.2257,600
1981-10-06$0.22$0.22153,600
1981-10-05$0.22$0.22988,800
1981-10-02$0.22$0.22921,600
1981-10-01$0.21$0.2157,600
1981-09-30$0.21$0.21268,800
1981-09-29$0.20$0.20576,000
1981-09-28$0.20$0.20326,400
1981-09-25$0.20$0.20547,200
1981-09-24$0.22$0.22115,200
1981-09-23$0.22$0.22844,800
1981-09-22$0.22$0.22470,400
1981-09-21$0.22$0.22105,600
1981-09-18$0.22$0.2286,400
1981-09-17$0.22$0.22451,200
1981-09-16$0.21$0.21124,800
1981-09-15$0.22$0.2248,000
1981-09-14$0.22$0.22528,000
1981-09-11$0.22$0.22230,400
1981-09-10$0.22$0.22355,200
1981-09-09$0.22$0.22182,400
1981-09-08$0.22$0.22268,800
1981-09-04$0.22$0.22268,800
1981-09-03$0.23$0.23124,800
1981-09-02$0.23$0.23384,000
1981-09-01$0.23$0.23528,000
1981-08-31$0.24$0.24153,600
1981-08-28$0.24$0.24384,000
1981-08-27$0.23$0.23470,400
1981-08-26$0.23$0.23259,200
1981-08-25$0.23$0.23374,400
1981-08-24$0.23$0.23451,200
1981-08-21$0.25$0.2557,600
1981-08-20$0.25$0.2528,800
1981-08-19$0.25$0.25163,200
1981-08-18$0.25$0.25748,800
1981-08-17$0.27$0.27336,000
1981-08-14$0.27$0.27345,600
1981-08-13$0.27$0.27105,600
1981-08-12$0.27$0.2767,200
1981-08-11$0.27$0.27528,000
1981-08-10$0.27$0.270
1981-08-07$0.27$0.27144,000
1981-08-06$0.27$0.27595,200
1981-08-05$0.26$0.2667,200
1981-08-04$0.25$0.2586,400
1981-08-03$0.25$0.25163,200
1981-07-31$0.24$0.24220,800
1981-07-30$0.23$0.23134,400
1981-07-29$0.23$0.23172,800
1981-07-28$0.23$0.23172,800
1981-07-27$0.23$0.23134,400
1981-07-24$0.23$0.2357,600
1981-07-23$0.23$0.23307,200
1981-07-22$0.23$0.23172,800
1981-07-21$0.23$0.23364,800
1981-07-20$0.23$0.23153,600
1981-07-17$0.23$0.23806,400
1981-07-16$0.23$0.23134,400
1981-07-15$0.23$0.23374,400
1981-07-14$0.23$0.23384,000
1981-07-13$0.23$0.23345,600
1981-07-10$0.22$0.22499,200
1981-07-09$0.22$0.22163,200
1981-07-08$0.21$0.21230,400
1981-07-07$0.21$0.21384,000
1981-07-06$0.22$0.22288,000
1981-07-02$0.22$0.22614,400
1981-07-01$0.22$0.22748,800
1981-06-30$0.22$0.22835,200
1981-06-29$0.24$0.24201,600
1981-06-26$0.24$0.24115,200
1981-06-25$0.24$0.24355,200
1981-06-24$0.24$0.24115,200
1981-06-23$0.24$0.24768,000
1981-06-22$0.24$0.241,296,000
1981-06-19$0.24$0.241,161,600
1981-06-18$0.24$0.241,968,000
1981-06-17$0.25$0.25748,800
1981-06-16$0.26$0.26441,600
1981-06-15$0.27$0.27508,800
1981-06-12$0.28$0.2886,400
1981-06-11$0.28$0.28124,800
1981-06-10$0.28$0.28172,800
1981-06-09$0.28$0.28211,200
1981-06-08$0.28$0.28355,200
1981-06-05$0.28$0.28297,600
1981-06-04$0.28$0.28268,800
1981-06-03$0.28$0.28844,800
1981-06-02$0.28$0.28902,400
1981-06-01$0.29$0.29518,400
1981-05-29$0.28$0.28268,800
1981-05-28$0.28$0.28787,200
1981-05-27$0.27$0.27297,600
1981-05-26$0.27$0.27268,800
1981-05-22$0.27$0.27499,200
1981-05-21$0.27$0.27643,200
1981-05-20$0.28$0.28345,600
1981-05-19$0.28$0.28288,000
1981-05-18$0.28$0.28604,800
1981-05-15$0.27$0.27748,800
1981-05-14$0.27$0.27374,400
1981-05-13$0.27$0.271,497,600
1981-05-12$0.26$0.261,180,800
1981-05-11$0.26$0.26576,000
1981-05-08$0.25$0.25556,800
1981-05-07$0.25$0.25403,200
1981-05-06$0.25$0.25777,600
1981-05-05$0.25$0.251,017,600
1981-05-04$0.25$0.25614,400
1981-05-01$0.25$0.251,363,200
1981-04-30$0.25$0.251,872,000
1981-04-29$0.25$0.254,483,200
1981-04-28$0.26$0.263,792,000
1981-04-27$0.25$0.254,809,600
1981-04-24$0.23$0.232,102,400
1981-04-23$0.23$0.231,200,000
1981-04-22$0.23$0.231,632,000
1981-04-21$0.23$0.231,526,400
1981-04-20$0.24$0.241,152,000
1981-04-16$0.23$0.23931,200
1981-04-15$0.23$0.232,620,800
1981-04-14$0.21$0.211,670,400
1981-04-13$0.21$0.211,382,400
1981-04-10$0.21$0.21614,400
1981-04-09$0.20$0.201,420,800
1981-04-08$0.20$0.202,688,000
1981-04-07$0.20$0.20787,200
1981-04-06$0.20$0.201,526,400
1981-04-03$0.21$0.212,265,600
1981-04-02$0.21$0.212,515,200
1981-04-01$0.20$0.203,734,400
1981-03-31$0.19$0.193,916,800
1981-03-30$0.19$0.192,361,600
1981-03-27$0.19$0.195,260,800
1981-03-26$0.19$0.1913,795,200
1981-03-25$0.19$0.1914,880,000