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RA Capital Management 13F holdings, Q1 2011

Holdings as of March 31, 2011 · filings on SEC EDGAR · latest filing →

RA Capital Management disclosed 21 US equity positions worth $129.6m in its Q1 2011 13F filing. The largest position was SEQUENOM INC at 12.0% of the reported book, followed by PHARMASSET INC and VALEANT PHARMACEUTICALS INTL. Against the Q4 2010 filing, it opened 11 new positions, added to 2 and reduced 5 among the top 21 holdings.

← Q4 2010 · Q2 2011 →

What did RA Capital Management own in Q1 2011? Top 21 positions

#StockSectorWeightValueSharesΔ sharesvs Q4 2010
1 SEQUENOM INC 12.0%$15.6m2,462,879 89% added
2 PHARMASSET INC 9.0%$11.6m147,761 -20% reduced
3 VALEANT PHARMACEUTICALS INTL 8.1%$10.5m211,500 0% held
4 ALXN ALEXION PHARMACEUTICALS INC 7.7%$10.0m101,050 0% held
5 AFFYMAX INC 7.6%$9.8m1,671,908 new
6 ARTHROCARE CORP 7.5%$9.7m290,319 -21% reduced
7 ACAD ACADIA PHARMACEUTICALS INC Healthcare 6.5%$8.4m5,173,708 new
8 GILD GILEAD SCIENCES INC Healthcare 6.2%$8.1m190,000 new
9 UTHR UNITED THERAPEUTICS CORP DEL Healthcare 5.3%$6.9m103,050 0% held
10 JAZZ PHARMACEUTICALS INC 5.3%$6.9m215,424 -49% reduced
11 DYNAVAX TECHNOLOGIES CORP 4.7%$6.0m2,191,071 -34% reduced
12 BSTC BIOSPECIFICS TECHNOLOGIES CO 4.6%$6.0m234,362 -22% reduced
13 ADVENTRX PHARMACEUTICALS INC 3.8%$5.0m2,365,000 new
14 COLUMBIA LABS INC 3.1%$4.1m1,076,116 5% added
15 RGEN REPLIGEN CORP Healthcare 2.6%$3.3m889,741 new
16 TENGION INC 2.0%$2.6m1,060,070 new
17 ENDOCYTE INC 1.6%$2.0m239,100 new
18 MAXYGEN INC 0.7%$926.0k178,015 new
19 ONCOTHYREON INC 0.7%$916.0k236,739 new
20 ENZB ENZO BIOCHEM INC 0.6%$787.0k187,900 new
21 DERMA SCIENCES INC 0.3%$436.0k44,940 new

Weights are shares of the reported long US equity book (options excluded). Values are as filed, normalised to whole dollars. Share changes compare against the immediately preceding filing only.