The phrase "a new report asserts" is correct and usable in written English.
You can use it when introducing information or claims made in a recent report, typically in a formal or academic context.
Example: "According to the findings, a new report asserts that climate change is accelerating at an unprecedented rate."
Alternatives: "a recent study claims" or "a new analysis states".
A new study asserts that storms indeed placed the boulders there.
A new Human Rights Watch report asserts that the Free Syrian Army and other smaller opposition groups have engaged in human rights abuses including kidnapping, detention and executions of security forces and pro-government militia members.
A new report by the Video Advertising Bureau asserts that news consumers across all ages, ethnicities, income levels, genders, and political affiliation perceive television as an exponentially more trustworthy information platform at all stages of political campaigns.
The days of stay-at-home mothers are behind us, asserts a new report from the Center for American Progress, which analyzed national labor data and found that, across the country, the share of moms who financially support their families continues to grow.
This conclusion is reinforced by a new report from Standard and Poor's that asserts that increasing income inequality is dampening U.S. economic growth.
Investing $30 billion a year in forest conservation -- less than seven percent of the $480 billion spent annually on fossil fuels subsidies -- could help stop deforestation while accelerating a transition toward a greener global economy, asserts a new report published by the International Resource Panel IRPP) and the UN REDD Programme.
Public Citizen, the liberal consumer group, asserts in a new report, "These sham issue ads are really designed to help industry allies who face tough re-election campaigns".
A new report from Geek.com's Russell Holly asserts that a new version of the Nexus 10 is indeed barreling down the pipeline, but it may not be made by the company you were expecting.
A new report issued on Monday by the Texas Independent Producers and Royalty Owners Association (TIPRO) asserts that 2018 was an all-time high for oil production in the state of Texas.
The nuclear issue was further highlighted by a new report issued Thursday by the International Atomic Energy Agency, the nuclear monitor of the United Nations, asserting that Iran had rapidly escalated its uranium enrichment capacity in recent months.
