GEOSPACE TECHNOLOGIES CORP

Ticker: GEOS CUSIP: 37364X109 Class: Common Stock

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 544,099 Value ($000) $9,201 Avg Close $20.08 Range $10.78 - $29.89

Q3 2025

Shares 628,404 Value ($000) $11,915 Avg Close $16.20 Range $10.22 - $21.90

Q2 2025

Shares 679,689 Value ($000) $9,694 Avg Close $7.46 Range $5.51 - $18.99

Q1 2025

Shares 667,196 Value ($000) $4,810 Avg Close $8.58 Range $7.02 - $10.46

Q4 2024

Shares 649,933 Value ($000) $6,512 Avg Close $11.13 Range $9.68 - $13.79

Q3 2024

Shares 627,349 Value ($000) $6,487 Avg Close $9.56 Range $8.09 - $10.81

Q2 2024

Shares 658,308 Value ($000) $5,912 Avg Close $11.24 Range $8.49 - $14.83

Q1 2024

Shares 673,683 Value ($000) $8,886 Avg Close $13.43 Range $11.40 - $17.09

Q4 2023

Shares 630,166 Value ($000) $8,167 Avg Close $12.23 Range $10.35 - $13.74

Q3 2023

Shares 548,275 Value ($000) $7,100 Avg Close $9.44 Range $7.22 - $14.59

Q2 2023

Shares 555,911 Value ($000) $4,319 Avg Close $7.94 Range $6.60 - $9.16

Q1 2023

Shares 556,275 Value ($000) $3,922 Avg Close $5.54 Range $3.96 - $7.55

Q4 2022

Shares 544,640 Value ($000) $2 Avg Close $4.33 Range $3.76 - $4.88

Q3 2022

Shares 549,104 Value ($000) $2,421 Avg Close $4.69 Range $4.10 - $5.45

Q2 2022

Shares 598,375 Value ($000) $2,836 Avg Close $5.71 Range $4.64 - $6.94

Q1 2022

Shares 614,401 Value ($000) $3,533 Avg Close $6.59 Range $4.97 - $8.88

Q4 2021

Shares 668,927 Value ($000) $4,495 Avg Close $8.73 Range $6.41 - $10.27

Q3 2021

Shares 688,255 Value ($000) $6,573 Avg Close $9.22 Range $7.78 - $10.94

Q2 2021

Shares 731,333 Value ($000) $5,916 Avg Close $8.23 Range $7.30 - $9.47

Q1 2021

Shares 750,255 Value ($000) $6,842 Avg Close $9.62 Range $8.15 - $12.40

Q4 2020

Shares 753,816 Value ($000) $6,453 Avg Close $6.84 Range $5.02 - $10.29

Q3 2020

Shares 771,429 Value ($000) $4,767 Avg Close $6.83 Range $5.64 - $8.15

Q2 2020

Shares 787,509 Value ($000) $5,923 Avg Close $6.66 Range $5.00 - $9.57

Q1 2020

Shares 812,587 Value ($000) $5,200 Avg Close $11.89 Range $4.61 - $16.96

Q4 2019

Shares 795,626 Value ($000) $13,343 Avg Close $15.19 Range $13.18 - $17.66

Q3 2019

Shares 785,050 Value ($000) $12,066 Avg Close $14.43 Range $11.61 - $16.61

Q2 2019

Shares 785,939 Value ($000) $11,874 Avg Close $13.76 Range $11.85 - $15.89

Q1 2019

Shares 768,711 Value ($000) $9,948 Avg Close $14.62 Range $10.01 - $16.92

Q4 2018

Shares 728,057 Value ($000) $7,506 Avg Close $13.38 Range $9.93 - $15.93

Q3 2018

Shares 720,973 Value ($000) $9,877 Avg Close $13.80 Range $12.68 - $15.12

Q2 2018

Shares 659,065 Value ($000) $9,267 Avg Close $11.58 Range $9.46 - $14.81

Q1 2018

Shares 571,185 Value ($000) $5,638 Avg Close $12.26 Range $9.18 - $15.66

Q4 2017

Shares 497,474 Value ($000) $6,452 Avg Close $15.45 Range $12.09 - $18.71

Q3 2017

Shares 468,905 Value ($000) $8,356 Avg Close $15.21 Range $13.08 - $17.99

Q2 2017

Shares 400,276 Value ($000) $5,536 Avg Close $15.37 Range $13.59 - $17.04

Q1 2017

Shares 357,941 Value ($000) $5,809 Avg Close $18.95 Range $13.80 - $24.37

Q4 2016

Shares 334,323 Value ($000) $6,807 Avg Close $20.24 Range $16.77 - $23.20

Q3 2016

Shares 324,986 Value ($000) $6,331 Avg Close $17.28 Range $14.51 - $19.96

Q2 2016

Shares 313,856 Value ($000) $5,138 Avg Close $16.29 Range $11.82 - $19.92

Q1 2016

Shares 313,856 Value ($000) $3,873 Avg Close $11.02 Range $7.62 - $14.69

Q4 2015

Shares 314,256 Value ($000) $4,422 Avg Close $14.23 Range $10.16 - $18.91

Q3 2015

Shares 318,536 Value ($000) $4,399 Avg Close $16.62 Range $13.44 - $23.45

Q2 2015

Shares 303,978 Value ($000) $7,007 Avg Close $20.88 Range $15.59 - $26.75

Q1 2015

Shares 278,704 Value ($000) $4,601 Avg Close $20.77 Range $14.95 - $28.88

Q4 2014

Shares 278,704 Value ($000) $7,386 Avg Close $29.00 Range $24.07 - $35.32

Q3 2014

Shares 281,190 Value ($000) $9,885 Avg Close $41.90 Range $34.01 - $55.50

Q2 2014

Shares 281,497 Value ($000) $15,504 Avg Close $56.24 Range $41.63 - $66.84

Q1 2014

Shares 267,253 Value ($000) $17,683 Avg Close $76.66 Range $60.70 - $94.82

Q4 2013

Shares 214,541 Value ($000) $20,346 Avg Close $91.95 Range $79.60 - $107.93

Q3 2013

Shares 194,893 Value ($000) $16,429 Avg Close $74.50 Range $66.87 - $84.82

Q2 2013

Shares 229,840 Value ($000) $15,877 Avg Close $83.42 Range $65.31 - $108.86

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	544,099	$9,201	$20.08	$10.78 - $29.89
Q3 2025	628,404	$11,915	$16.20	$10.22 - $21.90
Q2 2025	679,689	$9,694	$7.46	$5.51 - $18.99
Q1 2025	667,196	$4,810	$8.58	$7.02 - $10.46
Q4 2024	649,933	$6,512	$11.13	$9.68 - $13.79
Q3 2024	627,349	$6,487	$9.56	$8.09 - $10.81
Q2 2024	658,308	$5,912	$11.24	$8.49 - $14.83
Q1 2024	673,683	$8,886	$13.43	$11.40 - $17.09
Q4 2023	630,166	$8,167	$12.23	$10.35 - $13.74
Q3 2023	548,275	$7,100	$9.44	$7.22 - $14.59
Q2 2023	555,911	$4,319	$7.94	$6.60 - $9.16
Q1 2023	556,275	$3,922	$5.54	$3.96 - $7.55
Q4 2022	544,640	$2	$4.33	$3.76 - $4.88
Q3 2022	549,104	$2,421	$4.69	$4.10 - $5.45
Q2 2022	598,375	$2,836	$5.71	$4.64 - $6.94
Q1 2022	614,401	$3,533	$6.59	$4.97 - $8.88
Q4 2021	668,927	$4,495	$8.73	$6.41 - $10.27
Q3 2021	688,255	$6,573	$9.22	$7.78 - $10.94
Q2 2021	731,333	$5,916	$8.23	$7.30 - $9.47
Q1 2021	750,255	$6,842	$9.62	$8.15 - $12.40
Q4 2020	753,816	$6,453	$6.84	$5.02 - $10.29
Q3 2020	771,429	$4,767	$6.83	$5.64 - $8.15
Q2 2020	787,509	$5,923	$6.66	$5.00 - $9.57
Q1 2020	812,587	$5,200	$11.89	$4.61 - $16.96
Q4 2019	795,626	$13,343	$15.19	$13.18 - $17.66
Q3 2019	785,050	$12,066	$14.43	$11.61 - $16.61
Q2 2019	785,939	$11,874	$13.76	$11.85 - $15.89
Q1 2019	768,711	$9,948	$14.62	$10.01 - $16.92
Q4 2018	728,057	$7,506	$13.38	$9.93 - $15.93
Q3 2018	720,973	$9,877	$13.80	$12.68 - $15.12
Q2 2018	659,065	$9,267	$11.58	$9.46 - $14.81
Q1 2018	571,185	$5,638	$12.26	$9.18 - $15.66
Q4 2017	497,474	$6,452	$15.45	$12.09 - $18.71
Q3 2017	468,905	$8,356	$15.21	$13.08 - $17.99
Q2 2017	400,276	$5,536	$15.37	$13.59 - $17.04
Q1 2017	357,941	$5,809	$18.95	$13.80 - $24.37
Q4 2016	334,323	$6,807	$20.24	$16.77 - $23.20
Q3 2016	324,986	$6,331	$17.28	$14.51 - $19.96
Q2 2016	313,856	$5,138	$16.29	$11.82 - $19.92
Q1 2016	313,856	$3,873	$11.02	$7.62 - $14.69
Q4 2015	314,256	$4,422	$14.23	$10.16 - $18.91
Q3 2015	318,536	$4,399	$16.62	$13.44 - $23.45
Q2 2015	303,978	$7,007	$20.88	$15.59 - $26.75
Q1 2015	278,704	$4,601	$20.77	$14.95 - $28.88
Q4 2014	278,704	$7,386	$29.00	$24.07 - $35.32
Q3 2014	281,190	$9,885	$41.90	$34.01 - $55.50
Q2 2014	281,497	$15,504	$56.24	$41.63 - $66.84
Q1 2014	267,253	$17,683	$76.66	$60.70 - $94.82
Q4 2013	214,541	$20,346	$91.95	$79.60 - $107.93
Q3 2013	194,893	$16,429	$74.50	$66.87 - $84.82
Q2 2013	229,840	$15,877	$83.42	$65.31 - $108.86