GEOSPACE TECHNOLOGIES CORP (GEOS) Top Institutional Shareholders
GEOSPACE TECHNOLOGIES CORP (GEOS) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $70.33M in GEOS holdings during the latest filing period.
Disciplined Growth Investors is currently the largest disclosed institutional shareholder of GEOS tracked by InsiderSet, reporting ownership valued at approximately $13.44M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $7.94M, representing an estimated loss of -40.90% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 71% of the total disclosed GEOS value among the investors covered in this analysis. Major shareholders include Disciplined Growth Investors, Vanguard Capital Management Llc, Dimensional Fund Advisors Lp, and several other long-term asset managers with concentrated positions in GEOSPACE TECHNOLOGIES CORP (GEOS).
This page ranks the largest institutional GEOS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
86
Total Reported Value
$70.33M
Largest Holder
Disciplined Growth Investors
Largest Position
$13.44M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
103
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Disciplined Growth Investors | Fred Martin | 0.27% | 1,101,426 | $13,437,397 | $7,941,281 | -$5,496,116 | -40.90% |
| Vanguard Capital Management Llc | 0.00% | 577,032 | $7,039,790 | $4,160,401 | -$2,879,389 | -40.90% | |
| Dimensional Fund Advisors Lp | 0.00% | 491,016 | $5,989,798 | $3,540,225 | -$2,449,573 | -40.90% | |
| Grace & White Inc | 1.02% | 473,201 | $5,773,052 | $3,411,779 | -$2,361,273 | -40.90% | |
| Sei Investments Co | 0.00% | 410,906 | $5,013,053 | $2,962,632 | -$2,050,421 | -40.90% | |
| First Eagle U.S. Value | Jean-Marie Eveillard | 0.00% | 240,000 | $2,928,000 | $1,730,400 | -$1,197,600 | -40.90% |
| Blackrock, Inc. | 0.00% | 225,568 | $2,751,930 | $1,626,345 | -$1,125,585 | -40.90% | |
| Moors & Cabot, Inc. | 0.10% | 190,600 | $2,325,320 | $1,374,226 | -$951,094 | -40.90% | |
| Marshall Wace, Llp | 0.00% | 188,806 | $2,303,432 | $1,361,291 | -$942,141 | -40.90% | |
| Glenorchy Capital Ltd | 1.14% | 173,339 | $2,114,738 | $1,249,774 | -$864,964 | -40.90% | |
| Geode Capital Management, Llc | 0.00% | 152,154 | $1,857,342 | $1,097,030 | -$760,312 | -40.94% | |
| De Lisle Partners Llp | 0.21% | 147,133 | $1,787,666 | $1,060,829 | -$726,837 | -40.66% | |
| Susquehanna International Group, Llp | 0.00% | 146,395 | $1,786,019 | $1,055,508 | -$730,511 | -40.90% | |
| State Street Corp | 0.00% | 136,853 | $1,669,607 | $986,710 | -$682,897 | -40.90% | |
| Us Bancorp \De\ | 0.00% | 127,134 | $1,551,035 | $916,636 | -$634,399 | -40.90% | |
| Millennium Management Llc | 0.00% | 107,386 | $1,310,109 | $774,253 | -$535,856 | -40.90% | |
| Eagleclaw Capital Managment, Llc | 0.14% | 82,015 | $1,000,583 | $591,328 | -$409,255 | -40.90% | |
| Bridgeway Capital Management, Llc | 0.02% | 78,793 | $961,275 | $568,098 | -$393,177 | -40.90% | |
| Vanguard Fiduciary Trust Co | 0.00% | 76,065 | $927,993 | $548,429 | -$379,564 | -40.90% | |
| Two Sigma Investments, Lp | 0.00% | 73,907 | $901,665 | $532,869 | -$368,796 | -40.90% | |
| Northern Trust Corp | 0.00% | 40,596 | $495,271 | $292,697 | -$202,574 | -40.90% | |
| 683 Capital Management, Llc | 0.04% | 39,252 | $478,874 | $283,007 | -$195,867 | -40.90% | |
| Ironwood Investment Management Llc | 0.18% | 36,042 | $439,712 | $259,863 | -$179,849 | -40.90% | |
| Citadel Advisors Llc | 0.00% | 32,718 | $399,160 | $235,897 | -$163,263 | -40.90% | |
| American Century Companies Inc | 0.00% | 29,319 | $357,692 | $211,390 | -$146,302 | -40.90% | |
| Kingsview Wealth Management, Llc | 0.00% | 28,322 | $345,528 | $204,202 | -$141,326 | -40.90% | |
| Elevation Point Wealth Partners, Llc | 0.01% | 24,355 | $297,131 | $175,600 | -$121,531 | -40.90% | |
| Vestmark Advisory Solutions, Inc. | 0.00% | 24,313 | $296,619 | $175,297 | -$121,322 | -40.90% | |
| Mraz, Amerine & Associates, Inc. | 0.04% | 24,081 | $293,788 | $173,624 | -$120,164 | -40.90% | |
| Bnp Paribas Financial Markets | 0.00% | 23,442 | $285,992 | $169,017 | -$116,975 | -40.90% | |
| Hudson Bay Capital Management Lp | 0.00% | 22,293 | $271,975 | $160,733 | -$111,242 | -40.90% | |
| Qube Research & Technologies Ltd | 0.00% | 21,909 | $267,290 | $157,964 | -$109,326 | -40.90% | |
| Commonwealth Equity Services, Llc | 0.00% | 21,885 | $267,000 | $157,791 | -$109,209 | -40.90% | |
| Empowered Funds, Llc | 0.00% | 20,291 | $247,550 | $146,298 | -$101,252 | -40.90% | |
| Bank Of America Corp | 0.00% | 18,060 | $220,332 | $130,213 | -$90,119 | -40.90% | |
| Tannin Capital Llc | 0.15% | 17,209 | $209,950 | $124,077 | -$85,873 | -40.90% | |
| Morgan Stanley | 0.00% | 16,518 | $201,519 | $119,095 | -$82,424 | -40.90% | |
| Schonfeld Strategic Advisors Llc | 0.00% | 16,282 | $198,640 | $117,393 | -$81,247 | -40.90% | |
| Essex Investment Management Co Llc | 0.03% | 13,636 | $166,359 | $98,316 | -$68,043 | -40.90% | |
| Imc-Chicago, Llc | 0.00% | 13,498 | $164,676 | $97,321 | -$67,355 | -40.90% | |
| Barclays Plc | 0.00% | 11,866 | $144,765 | $85,554 | -$59,211 | -40.90% | |
| Omers Administration Corp | 0.00% | 11,100 | $135,420 | $80,031 | -$55,389 | -40.90% | |
| Charles Schwab Investment Management Inc | 0.00% | 10,335 | $126,087 | $74,515 | -$51,572 | -40.90% | |
| Wells Fargo & Company/Mn | 0.00% | 10,178 | $124,172 | $73,383 | -$50,789 | -40.90% | |
| Hub Investment Partners, Llc | 0.00% | 10,000 | $122,000 | $72,100 | -$49,900 | -40.90% | |
| Vanguard Global Advisers, Llc | 0.00% | 5,026 | $61,317 | $36,237 | -$25,080 | -40.90% | |
| Group One Trading Llc | 0.00% | 2,575 | $31,415 | $18,566 | -$12,849 | -40.90% | |
| Pnc Financial Services Group, Inc. | 0.00% | 2,000 | $24,400 | $14,420 | -$9,980 | -40.90% | |
| Sbi Securities Co., Ltd. | 0.00% | 1,806 | $22,033 | $13,021 | -$9,012 | -40.90% | |
| Osaic Holdings, Inc. | 0.00% | 1,643 | $20,044 | $11,846 | -$8,198 | -40.90% |
Frequently asked questions about GEOS
Who owns the most GEOS stock?
The largest holders of GEOS are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for GEOSPACE TECHNOLOGIES CORP (GEOS).
Is GEOS widely held by superinvestors?
Many widely followed stocks like GEOS appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly GEOS is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.