PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share (PESI)

Q: What does CUSIP 714157203 represent in this 13F holders report?

CUSIP 714157203 is the security identifier for PESI - PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share used to aggregate holder disclosures.

Q: How many institutions held PESI - PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share in Q1 2023?

31 institutional investors reported PESI - PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share for Q1 2023. Use the holders table for investor-level position and value details.

CUSIP: 714157203

Q1 2023 13F Holders as of 31 Mar 2023

Security type / class: Equity / Common Stock, $0.001 par value per share
Total 13F shares: 3,528,811
Total 13F value: $41,568,323
Share change: -51,744
Put/Call ratio: 42%
SEC-reported price per share: $11.78
Number of holders: 31
Value change: +$1,379,458
Number of buys: 21
Number of sells: 13
Shares outstanding: 21,115,855

Security key

714157203

Report period

Q1 2023

Institutions

Top holders

PESI full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 PERMA FIX ENVIRONMENTAL SERVICES INC SEC filings PERMA FIX ENVIRONMENTAL SERVICES INC company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 714157203

Newer quarter: Q2 2026

Recent filing periods:

Q2 2026

Ownership snapshot

Top reported holders of PESI - PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

HEARTLAND ADVISORS INC

Disclosed value leader

HEARTLAND ADVISORS INC

Comparable rows

15/15

Latest evidence

31 Dec 2022

13F Lead comparable stake: 5.3% Showing 1-6 of 15 holder rows.

Quick read

HEARTLAND ADVISORS INC leads the comparable SEC ownership view at 5.3%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens HEARTLAND ADVISORS INC's linked filing trail.

Comparable ownership Top 5

HEARTLAND ADVISORS INC 5.3%

VANGUARD GROUP INC 2.1%

BlackRock Finance, Inc. 1.4%

PERRITT CAPITAL MANAGEMENT INC 1.2%

Potomac Capital Management, Inc. 1.1%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
HEARTLAND ADVISORS INC	13F Company 13F	5.3%	$3,920,065 1,110,500 shares	—	31 Dec 2022
VANGUARD GROUP INC	13F Company 13F	2.1%	$1,556,112 440,825 shares	—	31 Dec 2022
BlackRock Finance, Inc.	13F Company 13F	1.4%	$1,066,586 302,149 shares	—	31 Dec 2022
PERRITT CAPITAL MANAGEMENT INC	13F Company 13F	1.2%	$872,087 247,050 shares	—	31 Dec 2022
Potomac Capital Management, Inc.	13F Company 13F	1.1%	$850,000 240,680 shares	—	31 Dec 2022
MORGAN DEMPSEY CAPITAL MANAGEMENT LLC	13F Company 13F	0.88%	$654,879 185,518 shares	—	31 Dec 2022

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2023

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

3,528,811

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2023 vs Q1 2023 Across Filers

Q1 2023 holders

Holder diff

Investor	Q1 2023 Shares	Q1 2023 Shares	Share Diff	Share Chg %	Q1 2023 value	Q1 2023 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend