In April 2026, Aldi Inc., the no-frills German discount grocer beloved by bargain hunters across America, filed a preemptive declaratory judgment lawsuit against Intellectual Ventures (IV). (That link may be paywalled, so here is the docket information: Case 1:26-cv-00461-UNA, filed 4/21/26 in the District Court for Delaware.) This is not the first “man bites shark” case against a patent troll, and not even the first in the open source software landscape, but it’s an interesting data point in a trend.
Revenue-Based Targeting
According to Aldi’s DJ action, IV’s patent assertions accuse Aldi’s use of “common, third-party, open-source software platforms” like Docker, Kubernetes, Apache Kafka, and Apache Spark. In its filing, Aldi alleges that “IV’s monetization model is not tied to any good-faith infringement analysis,” because IV has made no defendant-specific assessment of actual infringement prior to threatening patent lawsuits. Instead, the complaint characterizes IV’s campaign as targeting companies based merely on their market presence and revenue.
Patent-Trolling and the Open Source Problem
Intellectual Ventures was founded in 2000 and is now one of the largest patent portfolio holders in the United States. Its business model of buying patents, aggregating them, and licensing them under the threat of litigation, has earned it the questionable accolade of “patent troll public enemy #1” (from IPWatchdog). IV has always contested this kind of characterization, positioning itself as a defender of individual inventors. (As all patent trolls do.) And it is true that the original model of IV was less troll-like, because its early activities included funding of innovation as opposed to mere monetization of the innovation of others via patent acquisition. But over the years it has matured into a quintessential patent trolling business.
The collision between software patents and open source licensing has been a long, deep, but slow-motion war. Richard Stallman wrote in GPLv2 in 1991 that “any free program is threatened constantly by software patents.” Decades later, the threat still exists, but it has not taken the form that the free software community expected. Operating entities almost never bring patent lawsuits accusing open source software (setting aside the opening salvos in the Oracle v. Google war). This is because asserting patents against open source users is spectacularly unpopular, and any operating entity that does so risks a huge blow to its business reputation.
However, patent trolls have no business reputation to lose. So today, patent lawsuits targeting open source software are effectively limited to patent trolls. The threat to open source is exacerbated by the fact that open source software usually has no vendor with a duty to defend patent claims, so it is usually left to the users–particularly large users–to mount their own defense.
The Declaratory Judgment Gambit
Aldi’s decision to file a DJ action rather than wait to be sued is part of a broader trend. DJ actions are lawsuits brought by potential defendants who have been threatened with legal action, asking the court to declare there is no basis for the lawsuit.
Patent trolls come in all shapes and sizes. IV and Sound View are two of the more professional examples, but there are thousands of single-purpose trolling entities that use scattershot claims, bargain-basement counsel, and generally low-quality advocacy to bring nuisance claims and see what they can monetize. The trolls usually buy patents from failed companies, so they have no relation to the innovation–real or rhetorical–that formed the basis of the patent. Their scattershot approach to trolling has given defendants–who often have access to better advocacy–the opportunity to flip the script, and they have done so in various ways.
A DJ action is one anti-trolling tactic, and it is neither new, nor specific to open source related claims. In early April 2026, for example, three major insurance companies–The Hartford, Travelers, and Hanover–filed their own coordinated declaratory judgment complaints against IV. The Hartford’s complaint described how IV had been reaching out since late 2023, slowly escalating pressure that culminated in a $3.5 million licensing demand.
The choice of Delaware for these DJ cases is worth noting. Delaware courts would have venue over many large corporate defendants due to Delaware being the go-to domicile for corporations (other than Tesla, of course). Delaware is the third most popular patent litigation venue in the US, but that may simply be because so many companies are domiciled there, rather than it being a “rocket docket” for patent trolling. The Eastern District of Texas leads patent infringement cases with about 28% of cases filed in 2025, followed by the Western District of Texas at around 12%. Delaware sits at roughly 11%. For defendants, claiming venue with a DJ action in Delaware may be a strategy to avoid the Texas Two-Step of patent dockets.
Anti-Trolling Laws and Claims
But DJ actions are not the only recourse. Victims of patent trolls have taken the offensive in other, creative ways. Unfortunately, many of these strategies are expensive and difficult to execute. The main hurdle is the Noerr-Pennington doctrine, a First Amendment-based immunity doctrine that protects parties from antitrust liability for petitioning the government, including by filing lawsuits. This plaintiff-favorable doctrine extends to non-antitrust claims as well, though its exact scope is quite complex. But the upshot is that anti-trolling lawsuits by defendants based on claims like racketeering can easily fail. (See, for example, Cisco Systems, Motorola Solutions, and Netgear v. Innovatio (N.D. Ill. 2013), in which three major WLAN manufacturers filed a 55-count complaint against patent troll Innovatio alleging its patent assertion campaign was, inter alia, a violation of RICO, but the case was dismissed.)
Possibly as a response to this doctrine, many states have specific laws against bad faith patent assertion. Vermont passed the first such law in 2013, the Bad Faith Assertion of Patent Infringements, 9 Vt. Stat. Ann. §§ 4195–4199 (2013). The Vermont statute includes a list of factors to determine what constitutes bad-faith patent assertion, including sending assertion letters that fail to identify the patent at issue, the owner, or exactly how the target’s product infringes the patent; demanding an unreasonably fast response or unreasonably large license fees; and making false or deceptive statements. Fast forward to today, and over 30 states have such laws, including Wisconsin, Oregon, Washington, and Illinois. These state laws allow for claims brought by the state Attorney General, or by the defendants being pursued by the trolls, or both.
One of the most interesting pending cases in this area is Micron Technology v. Longhorn IP, which is testing the line of demarcation between federal patent claims and state anti-trolling laws. Patent law is entirely federal law, and patent cases are heard exclusively in federal court. So there are unresolved questions about whether the state anti-trolling actions are preempted by federal law. The Federal Circuit on December 18, 2025 dismissed Longhorn’s appeal for lack of jurisdiction, leaving this constitutional question unresolved. But it seems likely that states will continue to advance anti-trolling statutes–well, other than Texas, for which patent trolling remains a healthy (but IMO, shameful) cottage industry.
Good Luck, Aldi
Unfortunately, there is no Aldi around me–the chain is notably absent from the SF Bay area. But I am sure many of us in the tech world still wish it success against IV, in no small part because the universe of companies that use Docker, Kubernetes, Apache Kafka, or Apache Spark is just about all companies.


















