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Asset Manager ← All Institutions

Siren, L.L.C.

Q2 2026 · Filed 2026-08-13
Market Value
$4.9B
+39.1%
Holdings
119
-6
New Purchases
24
Added To
31
Closed
7
Reduced
20
Top 10 Concentration
45.2%
Turnover
26.1%

Top Buys (by % of Portfolio)

SymbolCur %Prior %Chg %Value
PBLS 1.68% 0.00% +1.68% $82M
ABVX 1.57% 0.00% +1.57% $77M
COAG 1.57% 0.00% +1.57% $77M
MANE 4.18% 2.71% +1.46% $204M
RLAY 1.40% 0.00% +1.40% $68M
ELVN 1.85% 0.83% +1.01% $90M
KLRA 1.00% 0.00% +1.00% $49M
DFTX 1.37% 0.50% +0.87% $67M
RYTM 2.59% 1.80% +0.79% $126M
COF 0.71% 0.00% +0.71% $34M
TNGX 3.96% 3.38% +0.59% $193M
SYRE 1.76% 1.18% +0.59% $86M
ORKA 0.49% 0.00% +0.49% $24M
SPTX 0.49% 0.00% +0.49% $24M
TYRA 0.48% 0.00% +0.48% $23M

Top Sells (by % of Portfolio)

SymbolCur %Prior %Chg %Value
SRRK 10.80% 15.18% -4.38% $527M
EWTX 2.65% 3.98% -1.33% $129M
ONC 2.72% 3.94% -1.22% $133M
CNTA 0.00% 1.19% -1.19% $0
ERAS 4.28% 5.19% -0.91% $209M
CRNX 1.09% 1.97% -0.88% $53M
GPCR 0.96% 1.83% -0.87% $47M
OLMA 1.25% 2.02% -0.78% $61M
KYMR 6.91% 7.57% -0.67% $337M
XENE 1.63% 2.19% -0.55% $80M
FULC 0.00% 0.51% -0.51% $0
STOK 1.34% 1.85% -0.51% $65M
DBVT 0.62% 1.11% -0.48% $30M
IRON 1.33% 1.80% -0.47% $65M
ORIC 0.67% 1.08% -0.42% $32M

Sector Allocation Over Time

Market Cap Concentration

TierHoldingsValueWeight
Mega Cap 11 $119M 2.4%
Large Cap 22 $420M 8.6%
Mid Cap 32 $2.9B 60.1%
Small Cap 33 $1.2B 25.0%
Micro Cap 21 $186M 3.8%

Portfolio Analytics

Avg Market Cap
$212.9B
Median Market Cap
$3.2B
Avg P/E
42.4
Median P/E
26.1
Avg Dividend Yield
0.00%
Avg Beta
1.07
# Stocks
119
# ETFs / Funds
0

Top Holdings (119 total)

# Symbol % Port Shares Value Avg Price Q/Q Value Chg Share Chg Chg % Status
1 SRRK 10.80% 9,575,013 $527M $55.00 -$6M -1,250,000 -11.6%
2 KYMR 6.91% 2,935,830 $337M $114.67 $71M -251,000 -7.9%
3 ERAS 4.28% 11,397,781 $209M $18.32 $27M +153,535 +1.4%
4 MANE 4.18% 1,655,374 $204M $122.94 $108M +150,000 +10.0%
5 TNGX 3.96% 6,179,364 $193M $31.26 $75M +522,259 +9.2%
6 RVMD 3.46% 900,000 $169M $187.28 $61M -210,980 -19.0%
7 BCAX 3.41% 5,602,970 $166M $29.69 $51M -200,000 -3.5%
8 ARWR 2.87% 1,715,476 $140M $81.51 $39M +100,000 +6.2%
9 ONC 2.72% 465,000 $133M $284.97 -$6M — —
10 EWTX 2.65% 3,184,629 $129M $40.63 -$10M -1,245,634 -28.1%
11 RYTM 2.59% 1,136,275 $126M $111.03 $63M +410,764 +56.6%
12 LXRX 2.18% 44,303,518 $106M $2.40 $37M — —
13 ELVN 1.85% 1,774,411 $90M $50.75 $61M +1,028,185 +137.8%
14 SYRE 1.76% 968,598 $86M $88.78 $45M +150,000 +18.3%
15 PBLS 1.68% 2,992,259 $82M $27.37 — +2,992,259 — NEW
16 XENE 1.63% 1,318,564 $80M $60.36 $3M — —
17 SLDB 1.58% 7,690,405 $77M $9.99 $21M — —
18 ABVX 1.57% 576,000 $77M $133.26 — +576,000 — NEW
19 COAG 1.57% 2,086,834 $77M $36.73 — +2,086,834 — NEW
20 RCUS 1.53% 2,420,430 $75M $30.83 $10M -586,647 -19.5%
21 COGT 1.48% 1,859,279 $72M $38.70 $6M +150,000 +8.8%
22 RLAY 1.40% 3,650,000 $68M $18.71 — +3,650,000 — NEW
23 TSHA 1.38% 9,846,579 $67M $6.81 $28M +1,016,666 +11.5%
24 DFTX 1.37% 1,419,493 $67M $47.04 $49M +500,000 +54.4%
25 STOK 1.34% 1,995,347 $65M $32.72 $319K — —
26 IRON 1.33% 888,401 $65M $73.14 $2M -100,000 -10.1%
27 CYTK 1.33% 758,952 $65M $85.19 $24M +145,000 +23.6%
28 SEPN 1.31% 1,900,000 $64M $33.49 $16M -100,000 -5.0%
29 OLMA 1.25% 4,856,949 $61M $12.51 -$10M +100,000 +2.1%
30 CRNX 1.09% 1,420,788 $53M $37.42 -$16M -482,848 -25.4%
31 KLRA 1.00% 2,214,286 $49M $22.03 — +2,214,286 — NEW
32 DYN 0.97% 2,129,125 $47M $22.21 $7M -100,000 -4.5%
33 GPCR 0.96% 872,967 $47M $53.67 -$17M -455,731 -34.3%
34 PVLA 0.81% 257,485 $39M $152.82 $7M — —
35 SLN 0.75% 3,311,438 $36M $10.98 $21M +400,000 +13.7%
36 DNLI 0.74% 1,396,513 $36M $25.72 $9M — —
37 RELY 0.71% 1,543,271 $35M $22.41 $10M — —
38 CGEM 0.71% 1,893,410 $34M $18.21 $18M +700,000 +58.7%
39 COF 0.71% 171,615 $34M $200.62 — +171,615 — NEW
40 TRVI 0.68% 1,786,867 $33M $18.65 $12M — —
41 ORIC 0.67% 2,998,192 $32M $10.83 -$6M — —
42 GOOGL 0.66% 90,000 $32M $357.37 $13M +24,297 +37.0%
43 DBVT 0.62% 1,857,362 $30M $16.40 -$8M — —
44 ABSI 0.59% 2,474,764 $29M $11.59 $23M +674,764 +37.5%
45 SION 0.55% 610,515 $27M $43.99 $15M +310,515 +103.5%
46 RAPP 0.55% 641,469 $27M $41.67 $7M — —
47 AMLX 0.55% 1,480,586 $27M $17.96 $9M +250,586 +20.4%
48 ANNX 0.52% 4,458,646 $25M $5.71 $4M +500,000 +12.6%
49 MNPR 0.51% 270,118 $25M $92.59 $10M — —
50 ORKA 0.49% 250,000 $24M $95.17 — +250,000 — NEW
51 SPTX 0.49% 1,095,316 $24M $21.72 — +1,095,316 — NEW
52 GLTO 0.48% 900,000 $23M $26.01 $99K — —
53 TYRA 0.48% 725,000 $23M $31.94 — +725,000 — NEW
54 ZURA 0.45% 3,734,866 $22M $5.90 -$187K — —
55 TSM 0.44% 44,700 $21M $477.57 $7M +2,500 +5.9%
56 NVDA 0.39% 95,000 $19M $200.09 $3M +5,915 +6.6%
57 RZLT 0.36% 3,328,287 $17M $5.20 $7M — —
58 MPLT 0.33% 450,000 $16M $35.84 $7M — —
59 NMRA 0.30% 8,497,822 $14M $1.70 -$2M — —
60 NBIS 0.29% 52,000 $14M $276.17 $3M -61,614 -54.2%
61 MSFT 0.29% 37,500 $14M $373.02 -$1M -3,880 -9.4%
62 CTMX 0.27% 3,457,711 $13M $3.75 -$3M — —
63 GENB 0.25% 736,104 $12M $16.87 $3M — —
64 IKT 0.24% 5,850,000 $12M $2.03 $2M — —
65 ADAG 0.23% 2,666,666 $11M $4.20 — +2,666,666 — NEW
66 ENGN 0.22% 6,256,662 $11M $1.73 — +6,256,662 — NEW
67 WHWK 0.22% 2,337,102 $11M $4.58 $4M +255,102 +12.2%
68 DDOG 0.21% 40,000 $10M $260.36 $4M -14,300 -26.3%
69 NOW 0.20% 100,000 $10M $99.28 $823K +12,910 +14.8%
70 AVGO 0.19% 25,000 $9M $377.75 $5M +10,000 +66.7%
71 IONQ 0.19% 170,000 $9M $53.26 $4M — —
72 FROG 0.18% 95,500 $9M $90.88 $3M -33,316 -25.9%
73 IREN 0.16% 175,000 $8M $45.73 $7M +131,900 +306.0%
74 AMZN 0.16% 32,500 $8M $238.34 -$2M -14,141 -30.3%
75 CRWD 0.16% 10,000 $8M $763.14 -$1M -13,070 -56.6%
76 DSGN 0.16% 523,212 $8M $14.47 — +523,212 — NEW
77 PDD 0.15% 95,000 $7M $76.28 -$1M +11,599 +13.9%
78 MSLE 0.14% 892,074 $7M $7.77 $2M — —
79 DT 0.14% 155,000 $7M $43.91 $1M +5,000 +3.3%
80 TENX 0.13% 427,141 $6M $14.55 -$615K — —
81 VTVT 0.13% 163,000 $6M $37.65 -$328K — —
82 ELOX 0.11% 400,000 $6M $13.88 — +400,000 — NEW
83 AGMB 0.11% 411,250 $5M $12.98 $1M — —
84 BABA 0.10% 50,000 $5M $95.98 — +50,000 — NEW
85 KRRO 0.09% 347,718 $5M $13.18 $647K — —
86 CLBT 0.09% 311,544 $5M $14.60 $255K — —
87 ADGI 0.09% 5,000,000 $4M $0.87 -$838K +1,000,000 +25.0%
88 OUST 0.09% 67,500 $4M $62.52 — +67,500 — NEW
89 PALI 0.09% 2,000,000 $4M $2.09 — +2,000,000 — NEW
90 AEVA 0.09% 145,459 $4M $28.72 $3M +35,459 +32.2%
91 SEER 0.08% 2,458,673 $4M $1.66 -$49K — —
92 IMAB 0.08% 2,004,739 $4M $1.95 -$3M -995,261 -33.2%
93 GTLB 0.08% 125,000 $4M $30.53 $2M +25,000 +25.0%
94 ODTX 0.08% 200,000 $4M $18.71 — +200,000 — NEW
95 FHTX 0.07% 720,720 $4M $4.88 $72K — —
96 AGEN 0.07% 1,064,250 $3M $3.06 -$298K — —
97 MNDY 0.06% 42,500 $3M $72.39 $1M +17,500 +70.0%
98 ZTS 0.05% 35,000 $3M $71.86 — +35,000 — NEW
99 WK 0.04% 45,000 $2M $48.51 -$3M -47,500 -51.4%
100 NFLX 0.04% 25,000 $2M $71.40 — +25,000 — NEW

New Positions

SymbolValue% Port
PBLS $82M 1.68%
ABVX $77M 1.57%
COAG $77M 1.57%
RLAY $68M 1.40%
KLRA $49M 1.00%
COF $34M 0.71%
ORKA $24M 0.49%
SPTX $24M 0.49%
TYRA $23M 0.48%
ADAG $11M 0.23%
ENGN $11M 0.22%
DSGN $8M 0.16%
ELOX $6M 0.11%
BABA $5M 0.10%
OUST $4M 0.09%

Sold Out Positions

SymbolValue% Port
PRMB — —%
AS — —%
FPS — —%
BCYC — —%
FULC — —%
MU — —%
CNTA — —%
View SEC EDGAR Filings for Siren, L.L.C. →

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For informational purposes only. Not investment advice. Data sourced from SEC filings. Privacy Terms