Disciplined Growth Investors Inc /Mn

13F Holdings History for GEOSPACE TECHNOLOGIES CORP - Common Stock (GEOS)

Symbol: GEOS on Nasdaq
Investment type: Equity / Common Stock
Latest Disclosed Ownership: 1.15M shares
Security Ownership: 9%

Shares, Excluding Options vs Price

Value, Excluding Options

DISCIPLINED GROWTH INVESTORS INC /MN ownership in GEOSPACE TECHNOLOGIES CORP Common Stock (GEOS)

2025-11-14 - DISCIPLINED GROWTH INVESTORS INC /MN has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 1.15M shares of GEOSPACE TECHNOLOGIES CORP Common Stock (GEOS). This represents 9% percent ownership of the company. In their previous filing dated 2025-08-14, DISCIPLINED GROWTH INVESTORS INC /MN had reported owning 1.24M shares, indicating a decrease of -7.33% percent.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
DISCIPLINED GROWTH INVESTORS INC /MN	9%	-7%	$21.9M	1.15M	-91,180	-7.33%	$18.96	13G/A	9/30/2025	14 Nov 2025 15:50:33
DISCIPLINED GROWTH INVESTORS INC /MN	9.7%	-2%	$25.1M	1.24M	-23,561	-1.86%	$20.13	13G/A	6/30/2025	14 Aug 2025 19:20:34
DISCIPLINED GROWTH INVESTORS INC /MN	9.9%	-11.8%	$8.03M	1.27M	-157,184	-11%	$6.33	13G/A	3/31/2025	15 May 2025 16:15:41
DISCIPLINED GROWTH INVESTORS INC /MN	11.2%	-7.5%	$9.02M	1.43M	-130,526	-8.39%	$6.33	13G/A	12/31/2024	14 Feb 2025 14:59:37
DISCIPLINED GROWTH INVESTORS INC /MN	12.1%		$9.85M	1.56M			$6.33	13G/A	9/30/2024	14 Nov 2024 16:24:37

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
9/30/2025	0.4%	-0.03%	$21.9M	1.15M	-91,180	-7.33%	$18.96	Q3 2025
6/30/2025	0.34%	-0.01%	$17.8M	1.24M	-23,561	-1.86%	$14.26	Q2 2025
3/31/2025	0.19%	-0.02%	$9.14M	1.27M	-157,184		$7.21	Q1 2025
12/31/2024	0.27%	-0.02%	$14.3M	1.43M	-130,526	-8.39%	$10.02	Q4 2024
9/30/2024	0.3%	0%	$16.1M	1.56M	-14,722	-0.94%	$10.34	Q3 2024
6/30/2024	0.27%	+0%	$14.1M	1.57M	+1,605	+0.1%	$8.98	Q2 2024
3/31/2024	0.38%	+0.02%	$20.7M	1.57M	+79,022	+5.3%	$13.19	Q1 2024
12/31/2023	0.42%	0%	$19.3M	1.49M	-7,351	-0.49%	$12.96	Q4 2023
9/30/2023	0.46%	0%	$19.4M	1.5M	-7,904	-0.53%	$12.95	Q3 2023
6/30/2023	0.26%	+0%	$11.7M	1.51M	+6,720	+0.45%	$7.77	Q2 2023
3/31/2023	0.27%	-0.01%	$10.6M	1.5M	-35,120	-2.29%	$7.05	Q1 2023
12/31/2022	0.17%	+0%	$6.47M	1.53M	+4,615	+0.3%	$4.22	Q4 2022
9/30/2022	0.19%	+0%	$6.74M	1.53M	+19,881	+1.32%	$4.41	Q3 2022
6/30/2022	0.19%	+0%	$7.15M	1.51M	+3,771	+0.25%	$4.74	Q2 2022
3/31/2022	0.19%	+0%	$8.66M	1.51M	+12,611	+0.84%	$5.75	Q1 2022
12/31/2021	0.2%	0%	$9.99M	1.49M	-19,746	-1.31%	$6.69^*	Q4 2021
9/30/2021	0.29%		$14.4M	1.51M			$9.55	Q3 2021
6/30/2021	0.23%	+0.02%	$12.2M	1.51M	+150,687	+11.1%	$8.09	Q2 2021
3/31/2021	0.25%	+0%	$12.4M	1.36M	+5,290	+0.39%	$9.12	Q1 2021
12/31/2020	0.22%	+0.09%	$11.6M	1.36M	+569,510	+72.3%	$8.56	Q4 2020
9/30/2020	0.11%	0%	$4.87M	787K	-5,008	-0.63%	$6.18	Q3 2020
6/30/2020	0.14%	-0.01%	$5.96M	792K	-48,338	-5.75%	$7.52	Q2 2020
3/31/2020	0.12%	-0.01%	$5.38M	841K	-63,077	-6.98%	$6.40	Q1 2020
12/31/2019	0.25%	0%	$15.2M	904K	-2,183	-0.24%	$16.77	Q4 2019
9/30/2019	0.26%	+0%	$13.9M	906K	+3,360	+0.37%	$15.37	Q3 2019
6/30/2019	0.25%	+0%	$13.6M	902K	+6,013	+0.67%	$15.11	Q2 2019
3/31/2019	0.2%	+0%	$11.6M	896K	+2,062	+0.23%	$12.94	Q1 2019
12/31/2018	0.19%	+0.08%	$9.22M	894K	+353,944	+65.5%	$10.31	Q4 2018
9/30/2018	0.12%	+0.01%	$7.4M	540K	+51,647	+10.6%	$13.70	Q3 2018
6/30/2018	0.13%	0%	$6.87M	489K	-759	-0.16%	$14.06	Q2 2018
3/31/2018	0.09%	0%	$4.83M	490K	-1,920	-0.39%	$9.87	Q1 2018
12/31/2017	0.13%	+0%	$6.37M	491K	+3,605	+0.74%	$12.97	Q4 2017
9/30/2017	0.18%	-0.01%	$8.69M	488K	-16,175	-3.21%	$17.82	Q3 2017
6/30/2017	0.15%	+0%	$6.97M	504K	+1,050	+0.21%	$13.83	Q2 2017
3/31/2017	0.18%	0%	$8.16M	503K	-4,975	-0.98%	$16.23	Q1 2017
12/31/2016	0.24%	+0.02%	$10.3M	508K	+38,200	+8.13%	$20.36	Q4 2016
9/30/2016	0.22%	0%	$9.15M	470K	-7,350	-1.54%	$19.48	Q3 2016
6/30/2016	0.2%	0%	$7.81M	477K	-5,275	-1.09%	$16.37	Q2 2016
3/31/2016	0.15%	0%	$5.95M	482K	-1,225	-0.25%	$12.34	Q1 2016
12/31/2015	0.17%	+0.09%	$6.8M	484K	+240,375	+98.8%	$14.07	Q4 2015
9/30/2015	0.09%	+0%	$3.36M	243K	+3,175	+1.32%	$13.81	Q3 2015
6/30/2015	0.13%	+0%	$5.53M	240K	+1,625	+0.68%	$23.05	Q2 2015
3/31/2015	0.09%	+0.09%	$3.94M	238K	+238,400	NEW	$16.51	Q1 2015

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.