SC Filed 2021-01-13 Event — SEC 0000892712-21-000009 →

HEARTLAND ADVISORS INC → PERMA FIX ENVIRONMENTAL SERVICES INC PESI

Stake: — Shares: —

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 21/100

Passive Schedule 13G filer baseline
Elevated short days-to-cover (11.4 DTC)
Short interest building (+10.3% vs prior settlement)

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

8 transactions

7 buys · 0 sales · 1 awards/exercises

Issuer Cluster

4 13D/G filings on this issuer

3 other filings besides this one

Filer Track Record

4 filings by this filer

3 other filings in the data moat

Short Interest · settle 2026-10-15

DTC 11.41

3,532,643 shares short · +10.3% vs prior

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-10-01	Wamp Zach Paul	director	Award	775	$11.74	$9K
2026-10-01	REEDER JOE	director	Award	1,289	$11.74	$15K
2026-10-01	Shelton Larry	director	Award	1,246	$11.74	$15K
2026-10-01	Grumski Joseph Timothy	director	Award	1,438	$11.74	$17K
2026-10-01	Bostick Thomas	director	Award	1,108	$11.74	$13K
2026-10-01	Duggan Kerry C	director	Award	748	$11.74	$9K
2026-10-01	ZWECKER MARK A	director	Award	1,038	$11.74	$12K
2026-07-13	Shelton Larry	director	Option exercise	2,400	$4.60	$11K

Other 13D/G Filings on PERMA FIX ENVIRONMENTAL SERVICES INC

Filed	Form	Filer	Stake	Shares
2021-11-16	SC	HEARTLAND ADVISORS INC	—	—	view →
2021-09-14	SC	HEARTLAND ADVISORS INC	—	—	view →
2019-12-20	SC	TALANTA Investment Group, LLC	—	—	view →

Other Filings by HEARTLAND ADVISORS INC

Filed	Form	Issuer	Stake	Shares
2021-11-16	SC	PERMA FIX ENVIRONMENTAL SERVICES INC PESI	—	—	view →
2021-09-14	SC	PERMA FIX ENVIRONMENTAL SERVICES INC PESI	—	—	view →
2018-01-09	SC	HARVARD BIOSCIENCE INC HBIO	—	—	view →

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