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Platinum Investment Management

Long Only

Platinum Investment Management · Filed 2026-08-13 · CIK 0001256071 · Q2 2026

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13F Long Booki

$406.7M

As of Q2 2026

Positions

85

Filed

2026-08-13

CIK 0001256071

13F long book at a glance — % of 13F

ZTO · 11%

MU

LRCX

+75 more · 61%

Weights are % of 13F long book — no factual capital disclosure exists for this filer.i

Min weight:

#

Value

# SharesSourceWeight

1

ZTO EXPRESS CAYMAN INCHIST

$44.6M

11.0%1,994,127——0.25%13F

2

MICRON TECHNOLOGY INCHIST

$20.5M

5.0%17,782(5,874)(24.8%)0.00%13F

3

LAM RESEARCH CORPHIST

$20.1M

4.9%46,439——0.00%13F

4

TRIP COM GROUP LTDHIST

$14.0M

3.4%351,921(27,797)(7.3%)0.05%13F

5

DINGDONG CAYMAN LTDHIST

$12.5M

3.1%6,486,507——10.18%13F

6

NOAH HLDGS LTDHIST

$9.9M

2.4%993,612——0.30%13F

7

BROADCOM INCHIST

$9.9M

2.4%26,186——0.00%13F

8

BIRKENSTOCK HOLDING PLCHIST

$9.0M

2.2%210,000(65,000)(23.6%)0.11%13F

9

ASTRAZENECA PLCHIST

$9.0M

2.2%48,088———13F

10

ALPHABET INCHIST

$8.7M

2.1%24,592——0.00%13F

11

MERCK & CO INCHIST

$8.1M

2.0%63,316——0.00%13F

12

APOGEE THERAPEUTICS INCHIST

—

$7.7M

1.9%58,314———13F

13

ABBVIE INCHIST

$7.6M

1.9%30,102——0.00%13F

14

JOHNSON & JOHNSONHIST

$7.1M

1.7%27,830——0.00%13F

15

YUM BRANDS INCHIST

$6.4M

1.6%39,847——0.01%13F

16

PDD HOLDINGS INCHIST

$6.0M

1.5%78,445——0.00%13F

17

COGENT BIOSCIENCES INCHIST

$6.0M

1.5%154,220+42,154+37.6%0.09%13F

18

UBS GROUP AGHIST

$5.8M

1.4%117,507———13F

19

NVIDIA CORPORATIONHIST

$5.6M

1.4%28,191——0.00%13F

20

IMMUNOVANT INCHIST

$5.6M

1.4%144,671(37,103)(20.4%)0.07%13F

21

ARROWHEAD PHARMACEUTICALS INHIST

$5.3M

1.3%64,752——0.05%13F

22

IDEAYA BIOSCIENCES INCHIST

$5.2M

1.3%138,708+47,071+51.4%0.14%13F

23

IQVIA HLDGS INCHIST

$5.2M

1.3%26,708———13F

24

H WORLD GROUP LTDHIST

$4.9M

1.2%117,996——0.00%13F

25

VERA THERAPEUTICS INCHIST

$4.9M

1.2%113,687——0.16%13F

26

STRUCTURE THERAPEUTICS INCHIST

$4.8M

1.2%90,363+23,499+35.1%0.04%13F

27

VISA INCHIST

$4.8M

1.2%14,000(1,000)(6.7%)0.00%13F

28

CATERPILLAR INCHIST

$4.8M

1.2%4,500(4,000)(47.1%)0.00%13F

29

ROGERS COMMUNICATIONS INCHIST

$4.8M

1.2%147,160———13F

30

AMER SPORTS INCHIST

$4.7M

1.2%140,000(10,000)(6.7%)0.03%13F

31

KROGER COHIST

$4.5M

1.1%81,305+20,562+33.9%0.01%13F

32

KLA CORPHIST

$4.4M

1.1%14,580+13,122+900.0%0.00%13F

33

CAMECO CORPHIST

$4.3M

1.1%42,356——0.01%13F

34

ADVANCED MICRO DEVICES INCHIST

$4.2M

1.0%7,210——0.00%13F

35

ARCUS BIOSCIENCES INCHIST

$4.1M

1.0%134,217——0.11%13F

36

ADOBE INCHIST

$3.8M

0.9%18,571——0.00%13F

37

FLOOR & DECOR HLDGS INCHIST

$3.7M

0.9%62,500(5,000)(7.4%)0.06%13F

38

META PLATFORMS INCHIST

$3.7M

0.9%6,500+1,500+30.0%0.00%13F

39

PALISADE BIO INCHIST

$3.6M

0.9%1,730,866+499,452+40.6%0.99%13F

40

DUTCH BROS INCHIST

$3.6M

0.9%50,000(2,500)(4.8%)0.04%13F

41

FAIR ISAAC CORPHIST

$3.6M

0.9%3,000(400)(11.8%)0.01%13F

42

GE VERNOVA INCHIST

$3.6M

0.9%3,047——0.00%13F

43

HOME DEPOT INCHIST

$3.5M

0.9%10,000(1,500)(13.0%)0.00%13F

44

VALARIS LTDHIST

$3.3M

0.8%45,956——0.07%13F

45

E L F BEAUTY INCHIST

$3.3M

0.8%45,000(27,500)(37.9%)0.08%13F

46

CAVA GROUP INCHIST

$3.3M

0.8%42,000(3,000)(6.7%)0.04%13F

47

DEFINIUM THERAPEUTICS INCHIST

$3.3M

0.8%70,000——0.05%13F

48

ROIVANT SCIENCES LTDHIST

$3.3M

0.8%92,397——0.01%13F

49

TRANSUNIONHIST

$3.2M

0.8%44,595———13F

50

REVOLUTION MEDICINES INCHIST

$3.2M

0.8%16,994(3,819)(18.3%)0.01%13F

51

DATADOG INCHIST

$3.1M

0.8%12,000+12,000NEW0.00%13F

52

BRIDGEBIO PHARMA INCHIST

$3.0M

0.7%39,742(9,527)(19.3%)0.02%13F

53

WINGSTOP INCHIST

$2.9M

0.7%17,000+5,000+41.7%0.06%13F

54

INTERCONTINENTAL EXCHANGE INHIST

$2.9M

0.7%23,913——0.00%13F

55

ECHOSTAR CORPHIST

$2.8M

0.7%27,509+15,000+119.9%0.01%13F

56

VERTIV HOLDINGS COHIST

$2.8M

0.7%8,286(1,841)(18.2%)0.00%13F

57

ABSCI CORPORATIONHIST

$2.8M

0.7%237,764——0.14%13F

58

ZYMEWORKS INCHIST

$2.7M

0.7%105,184——0.15%13F

59

MOTOROLA SOLUTIONS INCHIST

$2.6M

0.6%6,302——0.00%13F

60

MBX BIOSCIENCES INCHIST

$2.4M

0.6%43,597——0.09%13F

61

BOOKING HOLDINGS INCHIST

$2.2M

0.5%12,500+12,000+2,400.0%0.00%13F

62

ANALOG DEVICES INCHIST

$2.2M

0.5%5,485+5,485NEW0.00%13F

63

PROQR THRAPEUTICS N VHIST

$2.2M

0.5%1,159,428(76,086)(6.2%)1.10%13F

64

NETFLIX INC.HIST

$2.1M

0.5%30,000(20,023)(40.0%)0.00%13F

65

SERVICENOW INCHIST

$2.0M

0.5%20,000+20,000NEW0.00%13F

66

DOORDASH INCHIST

$1.8M

0.5%10,000+10,000NEW0.00%13F

67

C4 THERAPEUTICS INCHIST

$1.8M

0.4%384,766——0.31%13F

68

PALO ALTO NETWORKS INCHIST

$1.6M

0.4%4,766+4,766NEW0.00%13F

69

WAVE LIFE SCIENCES LTDHIST

$1.6M

0.4%275,269——0.14%13F

70

IDEXX LABS INCHIST

$1.5M

0.4%2,900(100)(3.3%)0.00%13F

71

BRIGHT MINDS BIOSCIENCES INCHIST

$1.3M

0.3%19,127——0.42%13F

72

STOKE THERAPEUTICS INCHIST

$1.3M

0.3%40,815——0.06%13F

73

M-TRON INDS INCHIST

$1.3M

0.3%12,839+12,839NEW0.30%13F

74

COSTAR GROUP INCHIST

$1.1M

0.3%40,000(37,500)(48.4%)0.01%13F

75

A10 NETWORKS INCHIST

$1.1M

0.3%28,630+28,630NEW0.04%13F

76

BLOCK INCHIST

$1.0M

0.2%12,500+12,500NEW0.00%13F

77

AURA BIOSCIENCES INCHIST

$0.8M

0.2%111,865——0.11%13F

78

JD.COM INCHIST

$0.7M

0.2%28,650——0.00%13F

79

ZOETIS INCHIST

$0.7M

0.2%10,000(32,000)(76.2%)0.00%13F

80

S&P GLOBAL INCHIST

$0.7M

0.2%1,685+1,685NEW—13F

81

ADC THERAPEUTICS SAHIST

$0.6M

0.2%581,609(409,169)(41.3%)0.46%13F

82

CODEXIS INCHIST

$0.6M

0.1%264,464——0.24%13F

83

INHIBRX BIOSCIENCES INCHIST

$0.6M

0.1%6,146+6,146NEW0.04%13F

84

ALIBABA GROUP HLDG LTDHIST

$0.4M

0.1%4,283——0.00%13F

85

SKYE BIOSCIENCE INCHIST

$0.2M

0.0%233,095——0.66%13F

Positions are primarily from the latest 13F-HR. Schedule 13D/13G filings (>5% stakes) are merged in when present; they report shares and percent of class but not dollar value. Chg Shares is the absolute change vs the same position in the prior quarter's 13F. % Out is position shares ÷ issuer shares outstanding (from the issuer's latest XBRL cover-page figure; weighted-average basic shares as a fallback), or the percent of class reported on a 13D/13G. Where a figure can't be sourced from a filing it shows “—” — never an estimate.