Practice Leadership
Honors & Awards
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Global Law Experts (2017-2018): Recognized as the Technology Sector Antitrust Law Firm of the Year in Washington, D.C.
Related Areas
Practice Leadership

- Jeffrey Blumenfeld
- Partner
Co-Chair, Antitrust & Trade Regulation

- Leiv Blad Jr.
- Partner
Co-Chair, Antitrust & Trade Regulation
Honors & Awards
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Global Law Experts (2017-2018): Recognized as the Technology Sector Antitrust Law Firm of the Year in Washington, D.C.
Related Areas
Antitrust & Trade Regulation
Our Antitrust & Trade Regulation lawyers take pride in having expansive knowledge and extensive experience handling the full range of antitrust challenges facing businesses in today’s highly competitive and changing landscape.
We regularly represent clients in criminal antitrust matters (investigations and trials), class-action antitrust lawsuits, actions brought by customers and suppliers, actions by or against competitors, and monopolization cases. We have significant experience litigating the full range of antitrust claims, including price fixing, bid-rigging, vertical restraints, and price discrimination, on both the plaintiff and defense sides.
Our lawyers advise on the competitive and antitrust impact of proposed corporate transactions. We help clients engaged in mergers and acquisitions with analysis of the potential competitive impacts of the proposed transactions, and we assist them in navigating obstacles presented by competition agencies when transactions are challenged. The lawyers in our practice have industry-leading experience in the often difficult analysis required for preparing and filing Hart-Scott-Rodino Antitrust Improvements Act (HSR Act) notifications with the Federal Trade Commission and the Department of Justice, and the team counsels on the application of the HSR Act and compliance with its provisions.
While we are capable of litigating and trying even the most complex antitrust cases, we recognize that our role is to serve our clients’ business strategies and goals and that settlement can be — and often is — the best option. Working with each client at the outset of a matter, we help the client assess the likely value of the matter and, based on that calculation, determine the best strategy to effectively and efficiently resolve the matter. Some matters are “bet the company” situations and justify large expenditures of time and money, and some are not; it is always in our clients’ best interest to make that determination up front and proceed accordingly.
Our lawyers immerse themselves in our clients’ businesses and industries to better understand clients’ goals, operations, market positions, and competition, and to better tailor clients’ business strategies and conduct to comply with antitrust laws. We regularly counsel clients concerning the antitrust implications of a wide range of business practices, such as distribution policies and programs, pricing policies, trade associations, information exchanges, and issues that regularly impact companies with large market shares.
We also work closely with our clients’ compliance officers to ensure that their companies adhere to the law while at the same time avoiding excessive measures that could prevent them from using legitimate instruments of competition. We have designed and executed corporate antitrust compliance programs, including awareness presentations, antitrust trainings, and full antitrust audits for corporations and organizations from different industries, including consumer products, energy, electricity, gas, electronic appliances, chemicals, and health care.
OUR TEAM

- Ario Fazli
- Associate

- Katie R. Glynn
- Associate

- Michael B. Himmel
- Partner

- Zarema A. Jaramillo
- Partner

- Michael T. G. Long
- Partner

- Jeffrey M. Shapiro
- Partner

- Jack Sidorov
- Senior Counsel
NEWS & INSIGHTS
FIRM NEWS
- October 14, 2019 "On Fifth Anniversary of Its D.C. Office, Lowenstein Announces Transition at the Helm"
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July 16, 2019
"Lowenstein Client Tower International (NYSE: TOWR) Agrees to Acquisition by Autokiniton Global Group in $900 Million Deal"
Peter H. Ehrenberg, Andrew E. Graw, Lowell A. Citron, Marita A. Makinen, Jeffrey Blumenfeld, Jack Sidorov, Jeffrey M. Shapiro, Elisia M. Klinka, Justin Gindi, Kate Basmagian, Daniel C. Porco, Erica Perlmutter, Robert Bee, Sabrina Cua, Brian A. Silikovitz, Kristin V. Taylor, Katie R. Glynn, Nicholas G. Mehler, Doreen M. Edelman, Lynda A. Bennett, Megan Monson, Michael B. Himmel, Norman W. Spindel
- December 13, 2018 "Medicare Coverage Class Action Filed Against Health and Human Services Secretary on Behalf of Diabetes Patients"
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December 12, 2018
"Lowenstein Represents Cerberus Capital Management, L.P. in Acquisition of Sparton Corporation"
Marita A. Makinen, Robert G. Minion, Jeffrey Blumenfeld, Mary J. Hildebrand CIPP/US/E, Nicholas G. Mehler, Christine Osvald-Mruz, Matt Savare, Jeffrey M. Shapiro, James C. Shehan, Michael Walutes, Jack Sidorov, Norman W. Spindel, Stuart S. Yusem, Manali Joglekar CIPP/US/E, Sabrina Cua, Allison Gabala, Megan Monson, Alex H. Rosenthal, Bryan Sterba, Matthew Tippy, Lauren E. Killeen, Lauren M. Troeller
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November 1, 2018
"Lowenstein Recognized by Global Law Experts as Technology Sector Antitrust Law Firm of the Year in Washington, D.C."
- October 25, 2018 "With All Eyes on U.S. Trade Policy, Lowenstein Sandler Expands Washington, D.C. Office With Launch of Global Trade & Policy Practice"
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January 09, 2018
"Election of Six to Lowenstein Sandler Partnership Highlights 2018 Promotions"
- February 15, 2017 "Lowenstein Continues DC Office Expansion with the Addition of Antitrust Partner Leiv Blad and Senior Counsel Zarema Jaramillo"
- November 24, 2014 "Lowenstein Sandler Adds Senior DOJ Antitrust Counsel to its New Washington DC Office"
- August 11, 2014 "Lowenstein Sandler Expands National Platform with New Washington, DC Office"
PUBLICATIONS
- November 7, 2019 "INSIGHT: Comprehensive Compliance Programs Key to Mitigating Risk of Potential Violations of Antitrust Laws, OFAC Sanctions, FCPA," Bloomberg Law
- October 15, 2019 "Government Expands Focus on Effective Compliance Programs," Lowenstein Sandler LLP
- October 8, 2019 "OFAC Introduces Reporting Rule That Applies to All U.S. Companies," Global Banking & Finance Review
- September 18, 2019 "Regulators Double Down on Compliance Scrutiny," CFO
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August 8, 2019
"New Guidelines on Antitrust Compliance Programs Offer Chance to Avoid Criminal Charges," Lowenstein Sandler Client Alert
- June 27, 2019 "A New Court Approach To DOJ And SEC Parallel Proceedings," Law360
- June 3, 2019 "Class Action Insights From Justices' App Store Opinion," Law360
- March 16, 2019 "What does the FTC’s new task force mean to data aggregators?," VentureBeat
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March 5, 2019
"2019 HSR Thresholds Announced by Federal Trade Commission," Antitrust & Trade Regulation Client Alert
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February 5, 2018
"2018 HSR Thresholds Announced by Federal Trade Commission," Antitrust & Trade Regulation Client Alert
- October 13, 2017 "Learning From DOJ's Parker Hannifin Merger Challenge," Law360
- June 7, 2017 "Reforming HSR Treatment Of Partial Acquisitions: Parts 1 and 2," Law360
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January 26, 2017
"2017 HSR Thresholds Announced by Federal Trade Commission," Antitrust & Trade Regulation Client Alert
- January 13, 2017 "The Outlook for Hart-Scott-Rodino Under President Trump," Law360
- June 27, 2016 "BNA Insights: DOJ's ValueAct HSR Compliance Case Raises Four Questions That Are Hard to Pass Over," Bloomberg BNA
- February 4, 2016 "2016 HSR Thresholds Announced by Federal Trade Commission," Antitrust & Trade Regulation Client Alert
- August 26, 2015 "A Late-Summer Dive Into the HSR Annual Report," Law360
- May 29, 2015 "Little Triggers – Private IPOs and The HSR Act," The Wall Street Journal's Accelerators Blog
IN THE MEDIA
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October 15-20, 2019
October 15-20, 2019
The transition of leadership of Lowenstein Sandler’s D.C. office to Antitrust & Trade Regulation partner Zarema A. Jaramillo was covered in Bloomberg Law – Big Law Business, General Counsel News, The Hill, The Deal, and The Washington Post. Jaramillo is set to take over on January 1, 2020, from Jeffrey Blumenfeld, who founded the D.C. office in 2014 and will remain Co-chair of the firm’s Antitrust & Trade Regulation practice group.
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September 26, 2019
September 26, 2019
Jeffrey Blumenfeld, co-chair of the firm’s Antitrust & Trade Regulation practice, comments in an article in The Hill on concerns that antitrust investigations into four leading automakers may be driven by politics. Blumenfeld, who served twice in the Department of Justice’s (DOJ) Antitrust Division, questions whether the DOJ now has sufficient legal grounds to pursue the investigation, and warns that a politically motivated investigation could permanently damage the Antitrust Division’s reputation: “Once people begin to suspect that law enforcement is not based on the law and is not even handed — once a law enforcement agency loses that moral authority, I don’t know how you get it back.”
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July 12-19, 2019
July 12-19, 2019
Longtime firm client Tower International's (NYSE: TOWR) acquisition by private equity-owned Autokiniton Global Group, in a $900 million deal expected to close in September or October, is reported in Crain's Detroit Business, The PE Hub Network, Automotive News, InvestorsHub, Law360, Smart Business Dealmakers, Mergers & Acquisitions, and the Global Legal Chronicle. (Lowenstein deal team: Peter H. Ehrenberg, Andrew E. Graw, Lowell A. Citron, Marita A. Makinen, Jeffrey Blumenfeld, Jack Sidorov, Jeffrey M. Shapiro, Elisia M. Klinka, Justin Gindi, Kate Basmagian, Daniel C. Porco, Matthew A. Weston, Erica Perlmutter, Robert Bee, Sabrina Cua, Brian A. Silikovitz, Kristin V. Taylor, Katie R. Glynn, Nicholas G. Mehler, Doreen M. Edelman, Lynda A. Bennett, Megan Monson, Michael B. Himmel, and Norman W. Spindel) View Lowenstein’s news announcement about this transaction.
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January 24, 2019
January 24, 2019
The PE Hub Network, The Deal, and Law360 (December 12, 2018; January 24, 2019) note Lowenstein Sandler as lead counsel to Cerberus Capital Management, L.P. in its acquisition of Sparton Corporation (NYSE: SPA). (Lowenstein deal team: Marita A. Makinen, Robert G. Minion, Jeffrey Blumenfeld, Mary J. Hildebrand, Nicholas G. Mehler, Christine Osvald-Mruz, Matt Savare, Jeffrey M. Shapiro, James C. Shehan, Michael Walutes, Jack Sidorov, Norman W. Spindel, Stuart S. Yusem, Manali Joglekar, Sabrina Cua, Allison Gabala, Megan Monson, Alex H. Rosenthal, Bryan Sterba, Matthew Tippy, Lauren E. Killeen, and Lauren M. Troeller.) (subscription required to view certain content) View Lowenstein’s news announcement about this transaction.
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October 5, 2018
October 5, 2018
CNN quotes Jeffrey Blumenfeld in an article noting that the outcome of the U.S. Department of Justice’s (DOJ) appeal of the lower court’s decision permitting AT&T’s $85 billion acquisition of Time Warner will depend on the views of the judges on the panel. The DOJ will have a more difficult time winning if the judges are skeptical of government intervention in business matters, which is often the case with more conservative judges Blumenfeld states, but may find a court more sympathetic to its arguments against the merger if the judges on the panel are less skeptical of such intervention.
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August 7; September 2; September 24, 2018
August 7; September 2; September 24, 2018
Wired, the Riverdale Standard, and LNR quote Jeffrey Blumenfeld in an article profiling Incompas CEO Charles Pickering and his support of net neutrality. Blumenfeld notes that, after the government forced AT&T to break into several smaller carriers (Baby Bells), Incompas (then called Comptel) played a key role in the telecom industry during post-breakup litigation over what the Bell companies could—and could not—do under the court decree that broke up the AT&T monopoly.
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September 7-8, 2018
September 7-8, 2018
The Hill, The Washington Post, the Houston Chronicle, and the East Bay Times quote Jeffrey Blumenfeld in an article reporting that the U.S. Department of Justice has invited attorneys general from some states, but not other important state attorneys general such as those from New York, California, Connecticut, and Washington – where the attorneys general are Democrats – to participate in a meeting in Washington, D.C., to assess whether tech companies such as Twitter, Facebook, and Google are hurting competition by deliberately stifling certain types of speech. Blumenfeld notes he does not know of a time when the DOJ selectively invited some but not others when issuing invitations to coordinate investigations.(subscription required to access certain content)
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July 12-24, 2018
July 12-24, 2018
Bloomberg Law – Big Law Business, The Washington Post(July 12, 2018; July 19, 2018), CNBC’s “Squawk Alley,” Law360, and Mobile World Live cover Jeffrey Blumenfeld’s perspective on the U.S. Department of Justice’s (DOJ) appeal of the U.S. District Court for the District of Columbia’s decision permitting AT&T’s $85 billion acquisition of Time Warner. Blumenfeld’s observations include noting that: The appeal may cause companies to pause on plans for industry vertical mergers pending the case’s outcome; the appeal shows the DOJ wants clarity on the AT&T/Time Warner merger and similar transactions and that the DOJ’s action means pending and future deals may come under increased scrutiny; the district court judge “simply credited everything that AT&T said and discounted almost everything the government said”; an appellate defeat could hinder “efforts to challenge similar vertical deals the future”; the appellate court might apply a burden of proof standard that the DOJ may have difficulty meeting in later cases; and, even if the DOJ loses, it could sue in the future to break up the merged entity if there were evidence of negative market impact or if, at a later date, there were evidence of anticompetitive conduct. (subscription required to access certain content)
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June 25, 2018
June 25, 2018
The Washington Post quotes Jeffrey Blumenfeld in an article discussing the implications of the Supreme Court’s decision to leave in place a ruling that allows American Express to enact “anti- steering provisions” on merchants who accept its credit cards. Blumenfeld notes that, since this decision will not change how American Express interacts with merchants, it’s an open question whether it will have an effect on merchants’ pricing.
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June 14, 2018
June 14, 2018
Law360 quotes Jeffrey Blumenfeld in an article discussing the antitrust enforcement implications of the U.S. District Court for the District of Columbia’s decision permitting AT&T’s $85 billion acquisition of Time Warner. Blumenfeld notes how surprising it was that the judge placed greater emphasis on defendant executives’ court testimony than on contemporaneous documents showing what the executives were thinking and discussing while the deal was being negotiated because testimony reflects preparation with lawyers, but contemporaneous documents “tell the real story.” Blumenfeld also notes that the government faces a difficult decision on whether to appeal the decision based, in part, on the judge’s treatment of the documents, both because there would be a high burden of proof and because of the risk that an adverse appellate decision could have greater impact. (subscription required to access article).
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June 12, 2018
June 12, 2018
CNNMoney quotes Jeffrey Blumenfeld in an article discussing the U.S. District Court for the District of Columbia’s decision permitting AT&T’s $85 billion acquisition of Time Warner and the parties’ possible next steps. Blumenfeld notes that if the U.S. government does not get an injunction to prevent the deal closing during what is likely to be a lengthy appeals process, the companies will merge their operations, making it that much more difficult to undo.
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May 26, 2018
May 26, 2018
GCR quotes Jeffrey Blumenfeld on the proposed merger of T-Mobile and Sprint.
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May 9, 2018
May 9, 2018
Law360 quotes Jeffrey Blumenfeld on the U.S. Department of Justice lawsuit seeking to block AT&T’s proposed merger with Time Warner. Blumenfeld comments on the risks of relying too heavily on economic evidence, the potential for AT&T documents to reveal the true motivations for the merger, AT&T’s burden of proof in defending against assertions of the deal’s negative economic impact, and the impact of the judge possibly imposing arbitration as a remedy. (subscription required to access article)
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April 30, 2018
April 30, 2018
The Seattle Times, the Los Angeles Times, The Washington Post, and Gildshire Magazines quote Jeffrey Blumenfeld on the proposed merger of T-Mobile and Sprint.
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April 23, 2018
April 23, 2018
CNNMoney quotes Jeffrey Blumenfeld on the U.S. Department of Justice lawsuit that seeks to block AT&T’s proposed merger with Time Warner. Blumenfeld notes the judge’s broad discretion in adjudicating the case and that the judge's questions to witnesses may not be clues as to his decision.
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March 18-26, 2018
March 18-26, 2018
The Hill, USA Today, CNN, and Law360 quote Jeffrey Blumenfeld on the U.S. Department of Justice lawsuit that seeks to block AT&T’s proposed merger with Time Warner. In The Hill, Blumenfeld notes the ineffectiveness of imposing behavioral conditions to avoid anticompetitive behavior following major industry mergers. In USA Today, he notes that this litigation offers consumers a real-world lesson in the antitrust issues that can affect everyday activities such as watching cable television and streaming programs. CNN quotes Blumenfeld on the difficulties AT&T customers might face should the deal be approved when attempting to obtain content that is not owned by AT&T. In Law360, Blumenfeld discusses the parties' back-and-forth regarding confidentiality concerns and notes how greater evidentiary openness in this case can offer consumers a look at antitrust law as applied to an industry they understand and interact with every day.
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December 14, 2017
December 14, 2017
Jeffrey Blumenfeld discusses net neutrality in The Washington Post and TheStreet.
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August 2017
August 2017
Jeffrey Blumenfeld comments in Washington Lawyer on how Lowenstein Sandler capitalizes on international legal networks and a collaborative culture to meet our clients' legal needs in today's globalized economy.
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April 25, 2017
April 25, 2017
In Law360, Jeff Blumenfeld discusses what to expect in the new administration's approach to antitrust and merger enforcement under AAG nominee Makan Delrahim.
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November 1, 2016
November 1, 2016
Jeff Blumenfeld is quoted in Variety on how the AT&T-Time Warner merger will affect content competitors such as Netflix and Hulu.
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October 25, 2016
October 25, 2016
Jeff Blumenfeld comments in a Bloomberg BNA article about possible ramifications of the 2011 joint agreement between Comcast and NBCUniversal on the AT&T-Time Warner bid.
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October 24, 2016
October 24, 2016
In Law360, Jeff Blumenfeld discusses AT&T's $84.5B Time Warner takeover and the likely shift in incentives and conduct once the two companies merge.
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June 25, 2015
June 25, 2015
In The Capitol Forum, Jack Sidorov discusses HSR Act compliance issues raised by stock acquisitions made in the context of a hostile takeover battle.
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February 7, 2015
February 7, 2015
Jack Sidorov is highlighted in the National Journal for bringing his antitrust premerger notification expertise to Lowenstein after more than thirty years with the Department of Justice Antitrust Division.
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June 5, 2014
June 5, 2014
In Bloomberg, Jeff Blumenfeld comments on the regulatory implications of Sprint's proposed acquisition of T-Mobile.
SPEAKING ENGAGEMENTS
- Celebration of the Fifth Anniversary of Lowenstein Sandler's Washington, D.C., Office, Lowenstein Sandler LLP, Washington, D.C., October 24, 2019
- Women, Influence & Power in Law Conference, Women, Influence & Power in Law, Washington, D.C., October 16-18, 2019
- A.C.E.S. Compliance Summit, Anti-Corruption, Anti-Bribery, Export Controls and Sanctions (A.C.E.S.), Washington, D.C., April 16, 2019
- IP/Antitrust in a Changing World , China Institute of International Antitrust and Investment, Beijing, China, December 13, 2018
- Deploying State Unfair and Deceptive Acts and Practices Statutes in Business-to-Business Litigation, American Bar Association's Section of Antitrust Law, November 29, 2018
- Women, Influence & Power in Law: The Original Global Forum Facilitating Women-to-Women Exchange on Leadership and Legal Issues, Corporate Counsel, Washington, DC, October 4-5, 2018
- Antitrust Essentials for Credit Professionals, Credit Management Association Webinar, July 25, 2017
- Antitrust, Patent Law, SEPs, FRAND: Who's in Charge Here?, SAS Conference on Patent Litigation, April 2017
- Recent Developments in Telephone Consumer Protection Act (TCPA) Enforcement and Litigation, ABA Section of Antitrust Law, Civil Practice and Procedures Committee, New York, NY, December 5, 2016
- The Risk of Connectivity, Bloomberg NEXT, Washington, D.C., November 17, 2016