ClearSign Technologies Corp - Common Stock (CLIR) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / Common Stock
Symbol
CLIR on Nasdaq
Shares outstanding
54,976,358
Price per share
$0.56
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
4,234,378
Total reported value
$3,267,120
% of total 13F portfolios
0%
Share change
-302,691
Value change
-$154,604
Number of holders
39
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of ClearSign Technologies Corp - Common Stock (CLIR) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
PASQUESI JOHN M 20% $6,703,762 10,989,774 John M Pasquesi 14 Feb 2025
clirSPV LLC 4.3% $1,371,906 2,249,027 HOFFMAN Robert Thurston Sr 14 Feb 2025

As of 30 Sep 2025, 39 institutional investors reported holding 4,234,378 shares of ClearSign Technologies Corp - Common Stock (CLIR). This represents 7.7% of the company’s total 54,976,358 outstanding shares.

Institutional Holders of ClearSign Technologies Corp - Common Stock (CLIR) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 138,018 $76,752 +$2,781 $0.56 2
2025 Q3 4,234,378 $3,267,120 -$154,604 $0.77 39
2025 Q2 4,537,069 $2,469,272 +$220,824 $0.56 36
2025 Q1 4,103,607 $3,072,294 +$547,543 $0.75 35
2024 Q4 3,362,465 $4,842,052 +$293,480 $1.44 30
2024 Q3 3,156,679 $2,682,932 +$5,564 $0.85 26
2024 Q2 3,157,915 $2,635,877 +$193,028 $0.83 27
2024 Q1 2,908,925 $2,806,448 +$124,817 $0.96 26
2023 Q4 2,766,798 $3,071,223 -$17,036 $1.11 25
2023 Q3 2,783,765 $3,033,989 +$142,400 $1.09 27
2023 Q2 2,646,366 $3,466,522 +$276,891 $1.31 26
2023 Q1 2,509,708 $2,002,651 -$27,012 $0.80 26
2022 Q4 2,554,277 $1,366,724 -$62,609 $0.54 29
2022 Q3 2,659,506 $2,437,000 +$14,757 $0.91 23
2022 Q2 2,595,982 $3,141,000 -$85,066 $1.21 24
2022 Q1 2,641,540 $4,306,630 -$81,729 $1.63 24
2021 Q4 2,709,002 $3,735,000 -$78,848 $1.38 25
2021 Q3 2,719,171 $5,477,000 -$1,130,142 $2.00 32
2021 Q2 2,976,513 $14,280,000 +$719,545 $4.80 41
2021 Q1 2,813,428 $63,403,000 +$50,340,875 $5.68 33
2020 Q4 2,329,504 $6,824,000 +$653,262 $2.93 28
2020 Q3 2,558,551 $5,780,000 +$411,126 $2.26 23
2020 Q2 2,380,552 $4,953,000 -$1,733,862 $2.08 24
2020 Q1 3,212,993 $2,314,000 -$26,707 $0.72 16
2019 Q4 3,250,237 $2,480,000 -$120,307 $0.76 18
2019 Q3 3,359,382 $4,105,000 +$20,062 $1.22 22
2019 Q2 3,341,216 $3,843,000 +$357,755 $1.15 19
2019 Q1 3,031,251 $2,727,000 -$483,671 $0.90 20
2018 Q4 3,478,793 $3,548,000 +$195,408 $1.02 20
2018 Q3 3,263,601 $5,224,000 +$364,493 $1.60 22
2018 Q2 3,018,775 $6,038,000 +$484,160 $2.00 23
2018 Q1 2,766,566 $5,600,000 +$1,559,760 $2.02 22
2017 Q4 1,941,020 $6,987,000 +$1,290,361 $3.60 23
2017 Q3 1,536,967 $5,456,000 -$84,742 $3.55 18
2017 Q2 1,560,946 $5,931,000 -$222,928 $3.80 23
2017 Q1 1,644,258 $6,411,000 +$1,329,887 $3.90 26
2016 Q4 1,373,990 $4,669,000 -$983,515 $3.40 29
2016 Q3 1,651,303 $9,905,000 +$1,346,570 $6.00 27
2016 Q2 1,421,597 $7,000,000 -$277,215 $5.00 26
2016 Q1 1,490,279 $5,945,000 -$622,345 $3.99 26
2015 Q4 1,667,594 $8,083,000 -$241,089 $4.85 29
2015 Q3 1,678,490 $10,385,000 +$349,813 $6.19 27
2015 Q2 1,626,205 $8,796,000 +$348,261 $5.41 23
2015 Q1 1,521,442 $8,047,000 +$1,670,780 $5.29 19
2014 Q4 1,180,860 $8,654,000 +$1,330,524 $7.33 22
2014 Q3 1,129,873 $7,547,004 +$645,312 $6.68 20
2014 Q2 1,026,844 $9,427,665 +$483,581 $9.18 19
2014 Q1 970,382 $10,588,232 +$3,114,790 $10.91 19