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Institutional Investment Manager
Palo Alto Investors LP
Palo Alto Investors LP (CIK: 0001306923) incorporated in California, located at 101 University Ave, Palo Alto, CA. Institutional holdings reported to the SEC.

Institutional Holdings (2016Q2)
Portfolio Summary: 45 holdings with a total value of $1,323,917,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 ABIOMED INC 2,066,919 225,894,000 17.06%
2 UNITED THERAPEUTICS 1,718,658 182,040,000 13.75%
3 BIOMARIN 1,737,399 135,170,000 10.21%
4 AMAG PHARMACEUTICALS INC COM 3,273,220 78,295,000 5.91%
5 CLOVIS ONCOLOGY INC 3,804,088 52,192,000 3.94%
6 INSMED INC COM PAR .01 5,054,713 49,839,000 3.76%
7 VANDA PHARMACEUTICALS INC COM 4,225,608 47,285,000 3.57%
8 ACADIA PHARMACEUTICALS INC COM 1,437,730 46,669,000 3.53%
9 CEMPRA INC 2,787,542 45,967,000 3.47%
10 Wright Medical Group NV 2,408,393 41,834,000 3.16%
11 ALEXION PHARMACEUTIC 339,400 39,628,000 2.99%
12 ZELTIQ AESTHETICS INCORPORATED 1,391,079 38,018,000 2.87%
13 EPIZYME INC COM 2,711,381 27,765,000 2.10%
14 CELGENE CORP 279,600 27,577,000 2.08%
15 PROTHENA CORP PLC 788,618 27,570,000 2.08%
16 GILEAD SCIENCES INC 318,400 26,561,000 2.01%
17 SHIRE PLC 119,300 21,961,000 1.66%
18 AMICUS THERAPEUTICS INC 4,009,375 21,891,000 1.65%
19 KARYOPHARM THERAPEUTICS INC COM 3,139,433 21,066,000 1.59%
20 ARIAD PHARMACEUTICALS INC 2,535,117 18,735,000 1.42%
21 STAAR SURGICAL CO 3,207,210 17,672,000 1.33%
22 Momenta Pharmaceuticals Inc 1,629,076 17,594,000 1.33%
23 MEDIVATION INC 273,983 16,521,000 1.25%
24 Heartware International, Inc. 272,986 15,765,000 1.19%
25 ENDO INTL 923,230 14,393,000 1.09%
26 SAGE THERAPEUTICS 417,878 12,591,000 0.95%
27 RIGEL PHARMACEUTICAL INC 5,386,534 12,012,000 0.91%
28 SEQUENOM INC 10,322,377 9,432,000 0.71%
29 EXACT SCIENCES CORP 396,276 4,854,000 0.37%
30 ACELRX PHARMACEUTICALS INC 1,425,439 3,834,000 0.29%
31 Sunesis Pharmaceuticals I 6,974,854 3,820,000 0.29%
32 ALIMERA SCIENCES INC 3,013,793 3,707,000 0.28%
33 AIMMUNE THERAPEUTICS INC COM 325,599 3,523,000 0.27%
34 ALIGN TECHNOLOGY INC 36,357 2,929,000 0.22%
35 IDERA PHARMACEUTICALS INC 1,257,748 1,924,000 0.15%
36 ALCOBRA LTD 272,788 1,225,000 0.09%
37 CYTOKINETICS INC 123,686 1,174,000 0.09%
38 INTREXON CORP 47,100 1,159,000 0.09%
39 SOPHIRIS BIO INC 494,000 1,062,000 0.08%
40 Dicerna Pharmaceuticals 267,890 804,000 0.06%
41 HISTOGENICS CORP 454,545 777,000 0.06%
42 Orexigen Therapeutics, Inc. 1,673,024 719,000 0.05%
43 ZOGENIX INC 29,500 237,000 0.02%
44 UNIQURE NV 20,453 151,000 0.01%
45 MARINUS PHARMACEUTICALS INC 63,517 81,000 0.01%

Portfolio data is normalized using SEC Form 13F filings, including the Restatement filing (0001306923-16-000050, filed 2016.08.16).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.