OBERWEIS ASSET MANAGEMENT INC/

Position in PUMP — ProPetro Holding Corp.

CIK 937886 LISLE, IL

Position in PUMP

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$15,732,414

+$1,819,559 QoQ

Shares Held

1,097,100

+13.6% QoQ

Ownership

0.893%

of shares outstanding

% of Portfolio

0.33%

of 13F equity value

Holder Rank

#36

of 268 holders

Holding Since

Dec 2025

3 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Energy · as of Jun 30, 2026

OBERWEIS ASSET MANAGEMENT INC/ holds $94,571,154 across 4 Oil & Gas Equipment & Services names. PUMP ranks #3 (16.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	SEI	Solaris Energy Infrastructure, Inc.	564,581	$45,426,187
2	KGS	Kodiak Gas Services, Inc.	355,870	$26,736,513
3	PUMP	ProPetro Holding Corp. This page	1,097,100	$15,732,414
4	XPRO	Expro Ltd	452,000	$6,676,040

3 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$15,732,414	1,097,100	+13.6%	Shares	Sole	2026-08-14
2026-03-31	$13,912,855	965,500	+1.9%	Shares	Sole	2026-05-15
2025-12-31	$9,014,529	947,900	—	Shares	Sole	2026-02-17
No filing history on record for this holder in this stock.