For the second quarter in a row, SeaWorld Entertainment reported notable gains in attendance and revenues, signaling a possible rebound from years of steep losses in visitation.

Attendance jumped nearly 5 percent in the second quarter ending June 30, with 290,000 more guests visiting SeaWorld’s 12 parks than in the same quarter last year. And through July, SeaWorld saw 900,000 more guests passing through park turnstiles compared with the year before, executives reported Monday.

During the second quarter, revenue also rose nearly 5 percent — to $391.9 million, compared with $373.8 million a year earlier.

Investors reacted positively to the news, as SeaWorld’s stock price rose by as much as 17 percent in morning trading.

The upbeat earnings report overshadowed news from SeaWorld that it has reached an initial settlement with the Securities and Exchange Commission related to possible violations of federal securities law.

The disclosure, which included few details other than it could cost the company an estimated $4 million, stems from a notice the company received earlier this year from the SEC notifying it that the agency’s staff was recommending that a “civil enforcement action or administrative proceeding be brought against the company.”

SeaWorld has been under investigation by both the SEC and Department of Justice for executives’ disclosures and public statements in August 2014 and earlier about the impact of the anti-captivity “Blackfish” documentary and trading in the company’s securities.

SeaWorld also is facing litigation accusing it of misleading shareholders about how the film contributed to falling attendance and revenue. The Department of Justice has intervened in that suit.

In its disclosure Monday, SeaWorld said the proposed settlement with the enforcement staff of the SEC includes no admission or denial of “potential charges against the Company arising out of the previously disclosed SEC investigation.” The settlement, SeaWorld said, is still subject to approval by the commission and there is no guarantee it will be finalized.

Interim CEO John Reilly, who only briefly referenced the possible settlement during the earnings call, attributed the second quarter’s strong results to new pricing strategies, a continued focus on marketing and well-received new attractions, including the recently opened Electric Eel coaster in San Diego.

“We are confident in the direction we are heading and we are encouraged by the results we are seeing in our business,” Reilly told analysts in an earnings conference call. “Our confidence extends to our long-term view in the significantly improved financial performance we believe this company can deliver in the next few years and beyond.”

The results come on the heels of a strong first quarter when attendance and revenue jumped by double digits. Attendance rose by nearly 15 percent, while quarterly revenue rose by 16.5 percent.

The second quarter, though, is a more credible reflection of the company’s performance given that it includes the start of summer when many more of SeaWorld Entertainment’s parks are open.

The two consecutive quarters of gains represent a significant turnaround from years of disappointing financial performance that has dogged the Orlando-based company since the release of “Blackfish,” which was critical of the marine parks’ treatment of killer whales.