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
-$154,606
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 -$154,606 $0.77 39
2025 Q2 4,537,069 $2,469,272 +$220,825 $0.56 36
2025 Q1 4,103,607 $3,072,294 +$547,544 $0.75 35
2024 Q4 3,362,465 $4,842,052 +$293,479 $1.44 30
2024 Q3 3,156,679 $2,682,932 +$5,570 $0.85 26
2024 Q2 3,157,915 $2,635,877 +$193,030 $0.83 27
2024 Q1 2,908,925 $2,806,448 +$124,819 $0.96 26
2023 Q4 2,766,798 $3,071,223 -$11,652 $1.11 25
2023 Q3 2,783,765 $3,033,989 +$142,394 $1.09 28
2023 Q2 2,646,366 $3,466,522 +$288,633 $1.31 27
2023 Q1 2,495,008 $1,990,920 -$26,773 $0.80 25
2022 Q4 2,539,277 $1,358,684 -$70,648 $0.54 28
2022 Q3 2,659,506 $2,437,000 +$83,754 $0.91 24
2022 Q2 2,595,982 $3,141,000 -$62,776 $1.21 24
2022 Q1 2,589,140 $4,217,630 -$113,622 $1.63 23
2021 Q4 2,674,202 $3,686,000 -$128,785 $1.38 25
2021 Q3 2,719,871 $5,478,000 -$1,123,022 $2.00 32
2021 Q2 2,976,513 $14,280,000 +$718,539 $4.80 41
2021 Q1 2,813,569 $63,404,000 +$50,332,234 $5.68 36
2020 Q4 2,317,048 $6,788,000 +$651,776 $2.93 26
2020 Q3 2,557,795 $5,779,000 +$411,129 $2.26 23
2020 Q2 2,380,552 $4,953,000 -$1,733,899 $2.08 24
2020 Q1 3,212,993 $2,314,000 -$26,705 $0.72 18
2019 Q4 3,249,237 $2,479,000 -$121,249 $0.76 18
2019 Q3 3,334,382 $4,074,000 +$22,215 $1.22 21
2019 Q2 3,341,216 $3,843,000 +$361,078 $1.15 19
2019 Q1 3,031,251 $2,727,000 -$483,695 $0.90 20
2018 Q4 3,478,793 $3,548,000 +$195,402 $1.02 20
2018 Q3 3,256,861 $5,213,000 +$400,711 $1.60 20
2018 Q2 2,978,441 $5,957,000 +$476,199 $2.00 22
2018 Q1 2,730,196 $5,526,000 +$1,550,612 $2.02 21
2017 Q4 1,935,280 $6,966,000 +$1,294,017 $3.60 22
2017 Q3 1,530,227 $5,432,000 -$78,666 $3.55 17
2017 Q2 1,560,946 $5,931,000 -$223,447 $3.80 23
2017 Q1 1,600,556 $6,241,000 +$1,367,861 $3.90 25
2016 Q4 1,394,190 $4,750,000 -$902,507 $3.40 30
2016 Q3 1,651,303 $9,905,000 +$1,348,568 $6.00 27
2016 Q2 1,421,264 $6,998,000 -$275,301 $5.00 25
2016 Q1 1,490,279 $5,945,000 -$522,345 $3.99 26
2015 Q4 1,667,594 $8,083,000 -$241,089 $4.85 29
2015 Q3 1,678,490 $10,385,000 +$311,661 $6.19 28
2015 Q2 1,608,699 $8,700,000 +$518,171 $5.41 21
2015 Q1 1,521,442 $8,047,000 +$1,668,995 $5.29 20
2014 Q4 1,170,294 $8,576,000 +$1,358,284 $7.33 21
2014 Q3 1,114,864 $7,446,004 +$642,957 $6.68 18
2014 Q2 1,001,844 $9,197,665 +$483,583 $9.18 18
2014 Q1 970,382 $10,588,232 +$3,114,061 $10.91 19