I cannot wait to see what happens at Harvard when the campus “Big Oil is Evil” activists learn of their school’s latest endowment activity.

I sense another kind of “Black Mass” may be organized.

Harvard University’s endowment took new stakes in a dozen Texas-based oil and gas companies in the latest quarter, according to a regulatory filing last week, as a plunge in crude prices led to energy stock declines.

The largest university endowment bought positions in companies including Kinder Morgan Energy Partners LP (KMP), Dresser-Rand Group Inc. (DRC) and Anadarko Petroleum Corp. (APC), helping increase the market value of its U.S. equities in the energy industry by $326.4 million to $366.6 million as of Sept. 30. Energy comprised about a third of Harvard’s $1.1 billion in U.S. public equity holdings, the second-largest industry, after health care. The holdings disclosed in the filing account for about 3 percent of the endowment’s assets, and may not represent Harvard’s broad investment strategy.

Harvard, whose endowment performance lagged behind Ivy League peers in recent years, has declined calls by both students and faculty to sell its holdings of fossil-fuel companies. The endowment, which was valued at $36.4 billion as of June, mostly invests with external managers. It reported a 15 percent return on investments for fiscal 2014, and in September the school chose Stephen Blyth to be Harvard Management Co.’s next leader.

Oil’s slide pushed energy shares down 20 percent over the four months through October, contributing almost half of the 4.3 percent loss in the Standard & Poor’s 500 Index. Without energy, the broad U.S. stock index’s decline over the stretch would have been 2.4 percent, according to data compiled by S&P Dow Jones Indices.