The New Brunswick, New Jersey-based company maintained its 2021 sales goal of $2.5 billion from the vaccine, and said it recorded $766 million in sales of the shot in the first nine months of 2021 - which indicates that sales will have to more than triple in the fourth quarter to meet its forecast.
"We're still very much committed to the $2.5 billion of revenue and the supply that is correlated to that," Chief Financial Officer Joseph Wolk told investors on a conference call.
The drugmaker earlier this year experienced quality problems at a Baltimore manufacturing facility that produces the single-dose vaccine, resulting in wastage of millions of doses.
The J&J shot, once touted an as important tool for vaccinating hard-to-reach areas, is behind its schedule for deliveries in the United States and Europe.
The vaccine has the lowest uptake in the United States at a time when rivals Moderna Inc and Pfizer are signing up supply deals for booster doses in 2022 and beyond.
"It's hard to say if J&J will meet that target or not, but with the booster guidance coming out soon, that could provide a boost to the fourth quarter," Edwards Jones analyst Ashtyn Evans told Reuters.
The US Food and Drug Administration (FDA) has yet to authorize a booster dose of the J&J vaccine, with a decision expected in the coming days.
J&J's shares rose nearly 2% in morning trade, reversing a premarket fall, as the company raised its overall adjusted profit forecast and beat earnings estimates.
Sales in its medical devices unit rose 8% to $6.64 billion but missed analyst estimates of $6.87 billion, hurt by a resurgence in COVID-19 cases due to the Delta variant.
Excluding items, J&J earned $2.60 per share, beating expectations of $2.35 per share, according to Refinitv data.
J&J lifted its 2021 forecast for adjusted earnings per share to between $9.77 and $9.82, from its prior estimates of $9.60 to $9.70.
Overall sales of $23.34 billion missed expectations of $23.72 billion.
COVID-19 vaccine sales of $502 million missed estimates of $815 million, according to FactSet.