With updated four-day figures, Paramount’s “Mission: Impossible — Ghost Protocol” maintained its No. 1 position at the domestic box office, posting an estimated $38.3 million through Monday for a Stateside cume of $141.2 million.

In second place, “Sherlock Holmes: A Game of Shadows” tallied a revised $26.5 million from Friday to Monday. The Warners pic now has scored $136.5 million domestically.

“Ghost Protocol” — the holiday B.O.’s top-grossing pic globally (at $366.5 million) — helped Par become 2011’s studio marketshare champ.

At the Stateside B.O., the studio reached $1.96 billion throughout last year, while internationally, Par hit $3.21 billion, making it the first studio ever to surpass the $3 billion mark in overseas grosses during a single year.

New Year’s weekend box office saw fine four-day perfs from additional holdovers.

Fox’s “Alvin and the Chipmunks: Chipwrecked” grossed over the long weekend a solid estimated $21 million, followed closely by Disney-DreamWorks’ “War Horse,” which collected $19.2 million in four days. “Alvin” has cumed $97.4 million domestically; “War Horse,” $45.2 million.

Meanwhile, Sony-MGM’s “The Girl With the Dragon Tattoo” scored a close fifth-place ranking $19 million through Monday, pushing its Stateside cume past the $60 million mark.

The weekend’s specialty players also capitalized on the holiday’s heightened moviegoing (overall four-day totals were up approximately 15% over the same frame last year).

The Weinstein Co.’s “The Iron Lady” scored the sesh’s best per-screen average, with $70,102 from four U.S. locations. Pic has posted a total $280,409 through Monday, while Weinstein’s other top player, “The Artist,” surpassed $5 million in domestic grosses.

By comparison, Focus Features’ “Tinker Tailor Soldier Spy” is outperforming “The Artist” on a theater-by-theater basis, with a Stateside cume of $4.3 million.