Mahon v. Mainsail, LLC

• Court: Court of Appeals for the Ninth Circuit
• Decided: February 24, 2026
• Docket: 24-3589
• Status: Unpublished

Opinion

NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS FEB 24 2026 MOLLY C. DWYER, CLERK U.S. COURT OF APPEALS FOR THE NINTH CIRCUIT

MARK MAHON, No. 24-3589 D.C. No. 4:20-cv-01523-YGR Plaintiff - Appellant,

v. MEMORANDUM* MAINSAIL, LLC; SHORELINE ENTERTAINMENT INC.; SAM EIGEN; MORRIS RUSKIN,

Defendants - Appellees,

and

ENTERTAINMENT ONE LICENSING US, INC., ENTERTAINMENT ONE, LTD., E1 ENTERTAINMENT UK, LTD., ENTERTAINMENT ONE U.S., LP,

Defendants.

Appeal from the United States District Court for the Northern District of California Yvonne Gonzalez Rogers, District Judge, Presiding

Submitted February 18, 2026**

* This disposition is not appropriate for publication and is not precedent except as provided by Ninth Circuit Rule 36-3. ** The panel unanimously concludes this case is suitable for decision without oral argument. See Fed. R. App. P. 34(a)(2). Before: CALLAHAN, FRIEDLAND, and BRESS, Circuit Judges.

Mark Mahon appeals pro se from the district court’s summary judgment in

his action alleging copyright infringement, trafficking in counterfeit labels, and

state law claims for fraud and conversion, all in relation to a film he created. We

have jurisdiction under 28 U.S.C. § 1291. We review de novo the district court’s

decision on cross motions for summary judgment. Csutoras v. Paradise High Sch.,

12 F.4th 960, 965 (9th Cir. 2021). We affirm.

The district court properly granted summary judgment for defendants on

Mahon’s copyright claims because Mahon failed to create a genuine dispute of

material fact as to whether defendants directly infringed on the film’s copyrights,

or materially contributed to, induced, or had the right and ability to supervise

another’s infringement. See VHT, Inc. v. Zillow Grp., Inc., 918 F.3d 723, 731, 745

(9th Cir. 2019) (setting forth elements to establish direct, contributory, and

vicarious infringement). The district court did not abuse its discretion in applying

judicial estoppel to bar Mahon’s contention that he, not his company, Maron

Pictures, owned the relevant copyrights. See Baughman v. Walt Disney World Co.,

685 F.3d 1131, 1133 (9th Cir. 2012) (setting forth standard of review and factors

for applying judicial estoppel, including that a party would gain an unfair

advantage from arguing a position inconsistent with one that a court previously

accepted in granting relief).

2 24-3589 The district court properly granted summary judgment for defendants on

Mahon’s claims of trafficking in counterfeit or illicit labels because Mahon failed

to create a triable dispute as to whether defendants transported, transferred, or

disposed of any such labels for financial gain or possessed such labels with intent

to do the same. See 18 U.S.C. §§ 2318(a)(1) (prohibiting trafficking in

“counterfeit” and “illicit” labels), 2320(f)(5) (defining trafficking).

The district court properly granted summary judgment for defendants on

Mahon’s conversion claims because Mahon failed to create a triable dispute as to

whether he owned or had a right to possess the DVDs and royalties in question.

See Lee v. Hanley, 354 P.3d 334, 344 (Cal. 2015) (setting forth elements of

conversion under California law, including that the plaintiff must own or have the

right to possess the property).

The district court properly granted summary judgment for defendants on

Mahon’s concealment claims because Mahon failed to create a triable dispute as to

whether defendants concealed or suppressed any material fact. See Boschma v.

Home Loan Ctr., Inc., 129 Cal. Rptr. 3d 874, 890 (Ct. App. 2011) (setting forth

elements for fraud or deceit on the basis of concealment).

We do not consider matters not specifically and distinctly raised and argued

in the opening brief, or arguments and allegations raised for the first time on

appeal. See Padgett v. Wright, 587 F.3d 983, 985 n.2 (9th Cir. 2009).

3 24-3589 All pending motions and requests are denied.

AFFIRMED.

4 24-3589