ClearSign Technologies Corp (CLIR) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

52,908,333Shares Outstanding

1,775,925Shares held by institutions

$1,118,833Value of institutional holdings

8.30%Institutional ownership %

7.04%Shares Changed QoQ

36No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

ClearSign Technologies Corp (NASDAQ:CLIR) currently has 36 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

ClearSign Technologies saw its institutional ownership percentage rose to 8.3% in December 2025 from 8.0% in September 2025.
In percentage terms, this reflects as a holdings change of 7.04% quarter on quarter, and an increase of 12.50% year over year.
Of these 36 institutional investors, 13 increased their holdings in ClearSign Technologies, while 7 of them reduced positions, and 16 investors maintained their exposure.
This class of investors increased its holdings in ClearSign Technologies to 4.39Mn shares for the 13F-cycle ending December 2025, up by 288.99K shares quarter on quarter, and up 1.03Mn shares year over year.
VANGUARD GROUP INC's holding of 1.32Mn shares as of December 31, 2025 makes it the primary institutional investor in ClearSign Technologies, owning 2.50% of the stock.
Among the most significant buyers of ClearSign Technologies during December 2025 were Rockefeller Capital Management L.P. (72.20K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (54.92K), VANGUARD GROUP INC (45.40K), RENAISSANCE TECHNOLOGIES LLC (36.77K), XTX Topco Ltd (29.02K).
Leading sellers of ClearSign Technologies stock in December 2025 included Creative Planning (23.00K), HRT FINANCIAL LP (3.38K), NORTHERN TRUST CORP (1.45K), UBS Group AG (983), BANK OF AMERICA CORP /DE/ (437).
The top 10 institutional holders of ClearSign Technologies for the quarter ending December 2025 included VANGUARD GROUP INC (1.32Mn), SIMON QUICK ADVISORS, LLC (603.15K), GEODE CAPITAL MANAGEMENT, LLC (523.11K), Cambridge Investment Research Advisors, Inc. (443.00K), BlackRock, Inc. (199.30K), Creative Planning (136.05K), HighTower Advisors, LLC (126.81K), DDD Partners, LLC (120.00K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (104.76K), STATE STREET CORP (88.99K).

36 Institutional Holders

1,775,925 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	1,322,980	45,396	3.55%	$735,577.00
SIMON QUICK ADVISORS, LLC	31 Dec, 2025	603,149	0	0.00%	$335,411.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	523,109	-120	-0.02%	$290,958.00
Cambridge Investment Research Advisors, Inc.	31 Dec, 2025	443,000	0	0.00%	$246.00
BlackRock, Inc.	31 Dec, 2025	199,304	0	0.00%	$110,833.00
Creative Planning	31 Dec, 2025	136,053	-23,000	-14.46%	$75,659.00
HighTower Advisors, LLC	31 Dec, 2025	126,809	0	0.00%	$70,518.00
DDD Partners, LLC	31 Dec, 2025	120,000	5,000	4.35%	$66,732.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	104,759	54,921	110.20%	$58,257.00
STATE STREET CORP	31 Dec, 2025	88,989	0	0.00%	$49,487.00
Rockefeller Capital Management L.P.	31 Dec, 2025	81,209	72,200	801.42%	$45,160.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	77,800	36,769	89.61%	$43,265.00
NORTHERN TRUST CORP	31 Dec, 2025	74,020	-1,446	-1.92%	$41,163.00
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	31 Dec, 2025	71,730	0	0.00%	$39,889.00
Disciplined Investments, LLC	31 Dec, 2025	55,886	0	0.00%	$31,078.00
Americana Partners, LLC	31 Dec, 2025	55,000	25,000	83.33%	$30,586.00
INTEGRITY ALLIANCE, LLC.	31 Dec, 2025	39,524	0	0.00%	$21,979.00
PREVAIL INNOVATIVE WEALTH ADVISORS, LLC	31 Dec, 2025	38,306	0	0.00%	$21,302.00
HIGHLAND CAPITAL MANAGEMENT, LLC	31 Dec, 2025	32,454	0	0.00%	$18,048.00
XTX Topco Ltd	31 Dec, 2025	29,015	29,015	0.00%	$16,135.00

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