RTW INVESTMENTS, LP Q1 2016 Filing

Filed May 11, 2016

Portfolio Value

$275.4B

Holdings

34

Report Date

Q1 2016

Filing Type

13F-HR

All Holdings (34 positions)

#StockSharesValue% PortfolioType
1
ALNYAlnylam Pharmaceuticals Inc
866,379$54.4B19.74%
2
INCYIncyte Corp
379,415$27.5B9.98%
3
La Jolla Pharmaceutical Co
1,169,065$24.4B8.87%
4
Achillion Pharmaceuticals Inc
2,558,859$19.8B7.17%
5
Kite Pharma Inc
343,503$15.8B5.73%
6
OMEROmeros Corp
891,522$13.7B4.97%
7
Avexis Inc
473,374$12.9B4.68%
8
Dicerna Pharmaceuticals Inc
2,026,894$10.9B3.94%
9
AGENEURAgenus Inc
2,414,524$10.0B3.65%
10
bluebird bio Inc
226,371$9.6B3.49%
11
Five Prime Therapeutics Inc
226,998$9.2B3.35%
12
MRTXEURMirati Therapeutics Inc
428,457$9.2B3.33%
13
Symmetry Surgical Inc
919,680$9.1B3.29%
14
ATRAGBXAtara Biotherapeutics Inc.
473,126$9.0B3.27%
15
BMYBristol-Myers Squibb Co
109,701$7.0B2.54%
16
BCRXBioCryst Pharmaceuticals Inc
1,973,932$5.6B2.03%
17
TLTiShares 20+ Year Treasury Bond ETF
30,000$3.9B1.42%
18
Celldex Therapeutics Inc
989,376$3.7B1.36%
19
Corium International Inc
828,332$3.2B1.16%
20
GBTUSDGlobal Blood Therapeutics Inc
190,981$3.0B1.10%
21
RGNXRegenxbio Inc
241,323$2.6B0.95%
22
Lipocine Inc
240,438$2.4B0.89%
23
Accelerate Diagnostics Inc
117,176$1.7B0.61%
24
Invuity Inc
212,808$1.5B0.56%
25
CytRx Corp
513,092$1.4B0.50%
26
3M4Masimo Corp
25,900$1.1B0.39%
27
MNKD 01/20/2017 PUT 3
4,385$899.0M0.33%Put
28
Biopharmx Corp
700,636$764.0M0.28%
29
MDRXAllscripts Healthcare Solutions Inc
48,000$634.0M0.23%
30
NTRANatera Inc
31,693$302.0M0.11%
31
Nivalis Therapeutics Inc
30,000$125.0M0.05%
32
ADAPYAdaptimmune Therapeutics-adr
7,691$63.0M0.02%
33
NVROEURNVRO 05/20/2016 PUT 50
142$36.0M0.01%Put
34
BRK/BBerkshire Hathaway Inc
50$7.0M0.00%