Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

PERMA FIX ENVIRONMENTAL SERVICES INC

CIK 0000891532PESI· quarter ending 2026-06-30

Shares outstanding

21,218,351

as of 2026-08-07 · 10-Q cover page, filed 2026-08-12

Held by 13F filers

9,470,507

44.6% of shares outstanding

Holders

+3 vs 2026-03-31 · 14 new, 11 exited

Value

$135.2M

shares +25.1% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-12, as of 2026-08-07)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	PESI · NASDAQ	21,218,351	9,470,507	44.6%	88	714157203

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	714157203	COM NEW	88	9,470,507	21,218,351	44.6%	$135.2M	1 call / 2 put	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (88 of 88 · 714157203)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	BlackRock, Inc.	1,252,756	5.90%	$17.9M	+82,453 (+7.0%)
2	MAK CAPITAL ONE LLC	1,032,958	4.87%	$14.8M	+114,285 (+12.4%)
3	VANGUARD CAPITAL MANAGEMENT LLC	811,743	3.83%	$11.6M	+52,308 (+6.9%)
4	Prescott Group Capital Management, L.L.C.	777,142	3.66%	$11.1M	—
5	Diamond Hill Capital Management, LLC (Investment Advisor)	642,533	3.03%	$9.2M	+286,555 (+80.5%)
6	KENNEDY CAPITAL MANAGEMENT LLC	610,903	2.88%	$8.7M	NEW
7	Potomac Capital Management, Inc.	477,000	2.25%	$6.8M	+180,300 (+60.8%)
8	GEODE CAPITAL MANAGEMENT, LLC	455,156	2.15%	$6.5M	+22,455 (+5.2%)
9	HEARTLAND ADVISORS INC	400,000	1.89%	$5.7M	—
10	STATE STREET CORP	349,744	1.65%	$5.0M	+14,197 (+4.2%)
11	DIMENSIONAL FUND ADVISORS LP	191,063	0.90%	$2.7M	+27,276 (+16.7%)
12	GOLDMAN SACHS GROUP INC	162,755	0.77%	$2.3M	+20,068 (+14.1%)
13	SUSQUEHANNA INTERNATIONAL GROUP, LLP	156,934	0.74%	$2.2M	+145,836 (+1314.1%)
14	CITADEL ADVISORS LLC	152,626	0.72%	$2.2M	+83,313 (+120.2%)
15	NORTHERN TRUST CORP	141,639	0.67%	$2.0M	+12,071 (+9.3%)
16	VANGUARD FIDUCIARY TRUST CO	123,040	0.58%	$1.8M	+3,787 (+3.2%)
17	GROUP ONE TRADING LLC	122,611	0.58%	$1.8M	-125,063 (-50.5%)
18	VANGUARD PORTFOLIO MANAGEMENT LLC	121,267	0.57%	$1.7M	+20,949 (+20.9%)
19	North Star Investment Management Corp.	120,532	0.57%	$1.7M	—
20	Diametric Capital, LP	114,714	0.54%	$1.6M	NEW
21	MYDA Advisors LLC	90,000	0.42%	$1.3M	-30,000 (-25.0%)
22	CM WEALTH ADVISORS LLC	87,839	0.41%	$1.3M	NEW
23	XTX Topco Ltd	62,888	0.30%	$899K	+39,661 (+170.8%)
24	Owls Nest Partners IA, LLC	56,555	0.27%	$808K	NEW
25	Pale Fire Capital SE	55,627	0.26%	$795K	+7,001 (+14.4%)
26	MORGAN STANLEY	53,084	0.25%	$759K	+26,366 (+98.7%)
27	JANE STREET GROUP, LLC	46,651	0.22%	$667K	+18,126 (+63.5%)
28	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	45,249	0.21%	$647K	+1,659 (+3.8%)
29	GatePass Capital, LLC	44,742	0.21%	$639K	+15,000 (+50.4%)
30	CORSAIR CAPITAL MANAGEMENT, L.P.	42,649	0.20%	$609K	+5,000 (+13.3%)
31	BANK OF AMERICA CORP /DE/	41,371	0.19%	$591K	-3,819 (-8.5%)
32	SEI INVESTMENTS CO	41,022	0.19%	$586K	NEW
33	Bank of New York Mellon Corp	38,101	0.18%	$544K	-2,278 (-5.6%)
34	ALLIANCEBERNSTEIN L.P.	32,850	0.15%	$351K	NEW
35	SIMPLEX TRADING, LLC	31,633	0.15%	$452K	+315 (+1.0%)
36	UBS Group AG	31,493	0.15%	$450K	-30,589 (-49.3%)
37	Squarepoint Ops LLC	30,976	0.15%	$443K	-20,964 (-40.4%)
38	WELLS FARGO & COMPANY/MN	29,303	0.14%	$419K	+8,473 (+40.7%)
39	D. E. Shaw & Co., Inc.	24,858	0.12%	$355K	-38,131 (-60.5%)
40	BROWN ADVISORY INC	23,333	0.11%	$333K	+3,333 (+16.7%)
41	Nuveen, LLC	22,454	0.11%	$321K	—
42	Trexquant Investment LP	21,948	0.10%	$314K	NEW
43	RHUMBLINE ADVISERS	20,879	0.10%	$298K	-531 (-2.5%)
44	Rothschild Wealth LLC	20,600	0.10%	$294K	—
45	Quadrature Capital Ltd	18,967	0.09%	$271K	NEW
46	FIFTH LANE CAPITAL, LP	18,000	0.08%	$257K	NEW
47	BAILARD, INC.	17,800	0.08%	$254K	—
48	Oxler Private Wealth LLC	17,005	0.08%	$243K	—
49	GUIDANCE CAPITAL, INC	16,683	0.08%	$256K	+381 (+2.3%)
50	IMC-Chicago, LLC	16,465	0.08%	$235K	-468 (-2.8%)
51	Quent Capital, LLC	16,199	0.08%	$231K	—
52	OSAIC HOLDINGS, INC.	15,900	0.07%	$227K	-100 (-0.6%)
53	DEUTSCHE BANK AG\	15,366	0.07%	$220K	+745 (+5.1%)
54	PRICE T ROWE ASSOCIATES INC /MD/	11,681	0.06%	$167K	+479 (+4.3%)
55	Vident Advisory, LLC	10,390	0.05%	$148K	—
56	MetLife Investment Management, LLC	9,410	0.04%	$134K	+4,488 (+91.2%)
57	Russell Investments Group, Ltd.	8,731	0.04%	$125K	+6,999 (+404.1%)
58	CITIGROUP INC	8,239	0.04%	$118K	+7,420 (+906.0%)
59	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	8,115	0.04%	$116K	-108 (-1.3%)
60	JPMORGAN CHASE & CO	7,469	0.04%	$98K	+387 (+5.5%)
61	Vanguard Global Advisers, LLC	5,742	0.03%	$82K	—
62	Police & Firemen's Retirement System of New Jersey	5,649	0.03%	$81K	—
63	Capital Advisors, Ltd. LLC	5,000	0.02%	$71K	—
64	NEW YORK STATE COMMON RETIREMENT FUND	4,400	0.02%	$63K	—
65	FMR LLC	4,181	0.02%	$60K	-545 (-11.5%)
66	Persistent Asset Partners Ltd	3,912	0.02%	$56K	NEW
67	BARCLAYS PLC	2,708	0.01%	$39K	-565 (-17.3%)
68	BNP PARIBAS FINANCIAL MARKETS	2,482	0.01%	$35K	-1,187 (-32.4%)
69	Tower Research Capital LLC (TRC)	1,784	0.01%	$25K	+256 (+16.8%)
70	Legal & General Group Plc	1,558	0.01%	$22K	—
71	Ameritas Investment Partners, Inc.	1,232	0.01%	$18K	—
72	Global Retirement Partners, LLC	744	0.00%	$11K	NEW
73	ROYAL BANK OF CANADA	579	0.00%	$9K	+529 (+1058.0%)
74	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	243	0.00%	$3K	-693 (-74.0%)
75	GAMMA Investing LLC	214	0.00%	$3K	—
76	Sterling Capital Management LLC	101	0.00%	$1K	-400 (-79.8%)
77	Arax Advisory Partners	90	0.00%	$1K	NEW
78	NISA INVESTMENT ADVISORS, LLC	71	0.00%	$1K	—
79	Torren Management, LLC	53	0.00%	$757	—
80	Caitong International Asset Management Co., Ltd	48	0.00%	$686	+34 (+242.9%)
81	EverSource Wealth Advisors, LLC	32	0.00%	$457	NEW
82	ROTHSCHILD INVESTMENT LLC	20	0.00%	$286	—
83	Essential Partners LLC	9	0.00%	$129	—
84	CoreCap Advisors, LLC	5	0.00%	$71	—
85	Allworth Financial LP	5	0.00%	$72	NEW
86	Optiver Holding B.V.	2	0.00%	$29	-168 (-98.8%)
87	SBI Securities Co., Ltd.	1	0.00%	$14	—
88	MORGAN DEMPSEY CAPITAL MANAGEMENT LLC	1	0.00%	$14	—

Exited since 2026-03-31 (11 filers; largest 11 shown)

GSA CAPITAL PARTNERS LLP	−16,097
Fermata Advisors, LLC	−12,936
Greenhaven Road Investment Management, L.P.	−11,303
Invesco Ltd.	−11,135
AMERICAN CENTURY COMPANIES INC	−10,692
Rockefeller Capital Management L.P.	−500
CWM, LLC	−195
JONES FINANCIAL COMPANIES LLLP	−140
PNC FINANCIAL SERVICES GROUP, INC.	−8
Sunbelt Securities, Inc.	−7
Farther Finance Advisors, LLC	−2

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Kaufman Michael A	SCHEDULE 13G/A	2026-08-28	2026-08-24	1,016,047	4.8%
MAK Capital Fund LP	SCHEDULE 13G/A	2026-08-28	2026-08-24	1,016,047	4.8%
MAK CAPITAL ONE LLC	SCHEDULE 13G/A	2026-08-28	2026-08-24	1,016,047	4.8%
HOLD Alapkezelo Zrt.	SCHEDULE 13G/A	2026-08-27	2026-08-25	2,249,986	10.6%
The Vanguard Group	SCHEDULE 13G/A	2026-03-27	2026-03-13	0	0%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.