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Siren, L.L.C.

Q4 2025 · Filed 2026-02-13
Market Value
$3.1B
+28.5%
Holdings
123
+2
New Purchases
18
Added To
28
Closed
24
Reduced
23
Top 10 Concentration
50.4%
Turnover
34.1%

Top Buys (by % of Portfolio)

SymbolCur %Prior %Chg %Value
OLMA 2.68% 0.00% +2.68% $83M
RVMD 3.45% 2.03% +1.42% $106M
GPCR 2.44% 1.20% +1.24% $75M
SRRK 15.48% 14.37% +1.11% $477M
EWTX 3.65% 2.64% +1.01% $112M
RAPT 1.51% 0.62% +0.89% $47M
COGT 1.88% 1.03% +0.85% $58M
MLYS 0.82% 0.00% +0.82% $25M
FULC 0.72% 0.00% +0.72% $22M
RCUS 2.33% 1.65% +0.67% $72M
SYRE 0.87% 0.26% +0.61% $27M
ADGI 0.32% 0.00% +0.32% $10M
TSHA 1.81% 1.50% +0.31% $56M
TNGX 2.35% 2.06% +0.29% $72M
ERAS 1.06% 0.80% +0.26% $33M

Top Sells (by % of Portfolio)

SymbolCur %Prior %Chg %Value
RNAM 0.00% 2.34% -2.34% $0
ONC 4.93% 7.01% -2.08% $152M
RZLT 0.00% 1.91% -1.91% $0
KRRO 0.09% 0.84% -0.75% $3M
LXRX 1.45% 2.19% -0.74% $45M
QURE 0.00% 0.67% -0.67% $0
CRNX 2.28% 2.93% -0.66% $70M
ARWR 3.23% 3.84% -0.61% $100M
RAPP 0.70% 1.31% -0.61% $21M
BCAX 2.85% 3.44% -0.59% $88M
AVBP 0.00% 0.54% -0.54% $0
RELY 0.72% 1.10% -0.38% $22M
RYTM 1.74% 2.11% -0.37% $54M
APLS 2.10% 2.43% -0.33% $65M
DYN 2.22% 2.50% -0.27% $69M

Sector Allocation Over Time

Market Cap Concentration

TierHoldingsValueWeight
Mega Cap 10 $54M 1.7%
Large Cap 29 $428M 13.9%
Mid Cap 35 $1.8B 57.9%
Small Cap 30 $725M 23.5%
Micro Cap 19 $89M 2.9%

Portfolio Analytics

Avg Market Cap
$207.2B
Median Market Cap
$3.5B
Avg P/E
70.0
Median P/E
36.7
Avg Dividend Yield
0.00%
Avg Beta
1.21
# Stocks
123
# ETFs / Funds
0

Top Holdings (123 total)

# Symbol % Port Shares Value Avg Price Q/Q Value Chg Share Chg Chg % Status
1 SRRK 15.48% 10,825,013 $477M $44.05 $132M +1,575,008 +17.0%
2 KYMR 8.30% 3,286,830 $256M $77.81 $62M -141,320 -4.1%
3 ONC 4.93% 500,000 $152M $303.81 -$16M +7,010 +1.4%
4 EWTX 3.65% 4,529,990 $112M $24.82 $49M +632,891 +16.2%
5 RVMD 3.45% 1,335,075 $106M $79.65 $58M +291,355 +27.9%
6 CNTA 3.27% 4,027,517 $101M $25.01 $22M +800,000 +24.8%
7 ARWR 3.23% 1,500,476 $100M $66.39 $8M -1,169,404 -43.8%
8 BCAX 2.85% 5,216,969 $88M $16.83 $5M
9 OLMA 2.68% 3,300,700 $83M $25.00 +3,300,700 NEW
10 IRON 2.55% 988,401 $78M $79.41 $18M +75,000 +8.2%
11 GPCR 2.44% 1,078,698 $75M $69.55 $46M +51,887 +5.0%
12 TNGX 2.35% 8,165,374 $72M $8.86 $23M +2,282,186 +38.8%
13 RCUS 2.33% 3,007,077 $72M $23.83 $32M +95,000 +3.3%
14 STOK 2.32% 2,247,347 $71M $31.74 $19M
15 CRNX 2.28% 1,507,636 $70M $46.55 -$150K -180,975 -10.7%
16 DYN 2.22% 3,502,941 $69M $19.56 $9M -1,226,233 -25.9%
17 APLS 2.10% 2,578,396 $65M $25.12 $6M
18 COGT 1.88% 1,629,279 $58M $35.52 $33M -95,000 -5.5%
19 SEPN 1.81% 2,000,000 $56M $27.88 $14M -202,514 -9.2%
20 TSHA 1.81% 10,129,913 $56M $5.50 $20M -884,824 -8.0%
21 RYTM 1.74% 499,975 $54M $107.04 $3M
22 RAPT 1.51% 1,375,000 $47M $33.87 $32M +794,534 +136.9%
23 TBLA 1.49% 9,969,495 $46M $4.61 $12M
24 LXRX 1.45% 38,918,903 $45M $1.15 -$8M
25 WVE 1.35% 2,450,000 $42M $17.00 $15M -1,246,322 -33.7%
26 XENE 1.18% 812,761 $36M $44.82 $4M
27 ERAS 1.06% 8,757,249 $33M $3.72 $13M
28 TRVI 0.93% 2,286,867 $29M $12.52 $5M -250,000 -9.8%
29 SYRE 0.87% 818,598 $27M $32.76 $21M +450,000 +122.1%
30 MLYS 0.82% 699,999 $25M $36.29 +699,999 NEW
31 DNLI 0.75% 1,396,513 $23M $16.51 $11M +575,000 +70.0%
32 RELY 0.72% 1,618,271 $22M $13.80 -$4M
33 FULC 0.72% 1,950,000 $22M $11.31 +1,950,000 NEW
34 RAPP 0.70% 708,469 $21M $30.34 -$10M -345,000 -32.8%
35 SLN 0.57% 2,911,438 $18M $6.08 $3M
36 IHS 0.57% 2,357,520 $18M $7.46 $2M
37 GOSS 0.52% 5,208,968 $16M $3.10 $2M
38 UPB 0.52% 588,450 $16M $27.15 $1M -200,000 -25.4%
39 BCYC 0.46% 2,012,752 $14M $7.08 -$1M
40 CGEM 0.40% 1,193,410 $12M $10.35 $5M
41 SION 0.40% 300,000 $12M $41.14 $3M -25,000 -7.7%
42 IMAB 0.39% 3,000,000 $12M $3.98 $8M +1,834,043 +157.3%
43 AMZN 0.39% 51,500 $12M $230.82 -$958K -7,000 -12.0%
44 NMRA 0.37% 6,288,783 $11M $1.79 $3M +1,930,500 +44.3%
45 ADGI 0.32% 4,000,000 $10M $2.47 +4,000,000 NEW
46 TSM 0.27% 27,700 $8M $303.89 $542K -500 -1.8%
47 ORIC 0.27% 1,007,575 $8M $8.18 -$4M
48 MPLT 0.26% 450,000 $8M $17.57 +450,000 NEW
49 PVLA 0.25% 75,000 $8M $104.67 +75,000 NEW
50 CRWD 0.25% 16,500 $8M $468.76 -$1M -2,000 -10.8%
51 IONQ 0.25% 170,000 $8M $44.87 -$3M
52 SEER 0.24% 4,000,000 $7M $1.83 -$1M
53 MSFT 0.24% 15,000 $7M $483.62 -$2M -2,150 -12.5%
54 PDD 0.23% 63,401 $7M $113.39 $1M +20,000 +46.1%
55 LXEO 0.23% 720,622 $7M $9.93 $3M +117,187 +19.4%
56 NVDA 0.23% 37,485 $7M $186.50 -$3K
57 CRM 0.22% 26,100 $7M $264.91 -$220K -4,000 -13.3%
58 CMPS 0.22% 1,000,000 $7M $6.90 +1,000,000 NEW
59 BLLN 0.22% 83,833 $7M $81.84 +83,833 NEW
60 WK 0.22% 79,123 $7M $86.25 $4M +49,123 +163.7%
61 GOOGL 0.21% 20,703 $6M $313.00 $1M -500 -2.4%
62 YNDX 0.21% 76,218 $6M $83.71 -$2M +3,618 +5.0%
63 SVRA 0.20% 1,000,000 $6M $6.03 +1,000,000 NEW
64 XFOR 0.19% 1,500,000 $6M $4.00 +1,500,000 NEW
65 FROG 0.19% 93,616 $6M $62.46 $777K -13,500 -12.6%
66 NOW 0.18% 35,630 $5M $153.19 -$1M +28,504 +400.0%
67 WHWK 0.16% 2,082,000 $5M $2.42 $1M
68 DT 0.16% 115,229 $5M $43.34 $138K +15,000 +15.0%
69 DDOG 0.16% 36,425 $5M $135.99 $265K +3,500 +10.6%
70 ALMS 0.16% 500,000 $5M $9.76 +500,000 NEW
71 META 0.15% 7,169 $5M $660.09 +7,169 NEW
72 PEPG 0.15% 700,000 $5M $6.51 $1M
73 SGMT 0.14% 724,771 $4M $5.92 -$681K
74 ADBE 0.14% 12,051 $4M $349.99 -$1M -3,000 -19.9%
75 FHTX 0.13% 720,720 $4M $5.40 $368K
76 GTLB 0.12% 99,000 $4M $37.53 $830K +35,000 +54.7%
77 KLRS 0.12% 435,798 $4M $8.44 $2M +117,534 +36.9%
78 EDU 0.11% 62,000 $3M $55.03 $122K
79 AGEN 0.11% 1,064,250 $3M $3.14 -$756K
80 MDLN 0.10% 75,000 $3M $42.00 +75,000 NEW
81 KRRO 0.09% 347,718 $3M $8.01 -$17M -71,115 -17.0%
82 CLBT 0.09% 150,000 $3M $18.04 $1M +60,000 +66.7%
83 RANI 0.09% 2,000,000 $3M $1.35 +2,000,000 NEW
84 ZS 0.09% 12,000 $3M $224.92 +12,000 NEW
85 BDTX 0.08% 1,046,517 $3M $2.43 -$1M
86 MNDY 0.08% 17,000 $3M $147.56 $1M +10,000 +142.9%
87 AVGO 0.08% 7,000 $2M $346.10 +7,000 NEW
88 QCOM 0.08% 14,000 $2M $171.05 $66K
89 ARM 0.08% 21,500 $2M $109.31 +21,500 NEW
90 BEKE 0.07% 145,000 $2M $15.76 -$470K
91 PANW 0.07% 11,450 $2M $184.20 -$630K -2,000 -14.9%
92 CRWV 0.06% 27,500 $2M $71.61 -$1M +3,500 +14.6%
93 IREN 0.05% 43,100 $2M $37.77 $690K +23,100 +115.5%
94 VRNS 0.04% 37,500 $1M $32.80 +37,500 NEW
95 PRMB 0.04% 75,000 $1M $16.35 -$431K
96 GBIO 0.04% 201,419 $1M $5.68 -$673K -95,473 -32.2%
97 FIG 0.03% 25,000 $934K $37.37 $156K +10,000 +66.7%
98 TSLA 0.02% 1,500 $675K $449.72 $8K
99 CRBU 0.01% 105,347 $168K $1.59 -$78K
100 PRQR —% -$3M -1,552,183 -100.0% SOLD

New Positions

SymbolValue% Port
OLMA $83M 2.68%
MLYS $25M 0.82%
FULC $22M 0.72%
ADGI $10M 0.32%
MPLT $8M 0.26%
PVLA $8M 0.25%
CMPS $7M 0.22%
BLLN $7M 0.22%
SVRA $6M 0.20%
XFOR $6M 0.19%
ALMS $5M 0.16%
META $5M 0.15%
MDLN $3M 0.10%
RANI $3M 0.09%
ZS $3M 0.09%

Sold Out Positions

SymbolValue% Port
ESTC —%
CMG —%
HUBS —%
PCOR —%
SPOT —%
KVUE —%
PINS —%
VRT —%
AVBP —%
BIOA —%
ELDN —%
ALAB —%
IRWD —%
KDP —%
CHYM —%
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