Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Apple
AAPL
|
+$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$38.8M |
| 4 |
Amazon
AMZN
|
+$38.6M |
| 5 |
Tesla
TSLA
|
+$36M |
Top Sells
| 1 |
Alibaba
BABA
|
+$46.4M |
| 2 |
Boeing
BA
|
+$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
NVIDIA
NVDA
|
+$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
NEWR
876
DELISTED
New Relic, Inc.
NEWR
| $138K | ﹤0.01% |
2,114
-11,246
| -84% | -$734K |
|
877
CytomX Therapeutics
CTMX
$350M
| $137K | ﹤0.01% |
+16,494
| New | +$137K |
|
878
Healthpeak Properties
DOC
$12.5B
| $137K | ﹤0.01% |
3,997
-26,208
| -87% | -$898K |
|
|
FLOW
879
DELISTED
SPX FLOW, Inc.
FLOW
| $137K | ﹤0.01% |
+2,812
| New | +$137K |
|
|
HTZ
880
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $137K | ﹤0.01% |
8,758
-76,054
| -90% | -$1.19M |
|
881
Boise Cascade
BCC
$3.2B
| $136K | ﹤0.01% |
+3,734
| New | +$136K |
|
882
The GEO Group
GEO
$3.02B
| $136K | ﹤0.01% |
+8,241
| New | +$136K |
|
883
Monolithic Power Systems
MPWR
$41.2B
| $136K | ﹤0.01% |
+768
| New | +$136K |
|
884
Ingevity
NGVT
$2.1B
| $136K | ﹤0.01% |
1,562
-258
| -14% | -$22.5K |
|
885
Rigel Pharmaceuticals
RIGL
$666M
| $136K | ﹤0.01% |
6,374
+2,210
| +53% | +$47.2K |
|
886
Sundial Growers
SNDL
$612M
| $136K | ﹤0.01% |
4,536
+4,014
| +769% | +$120K |
|
887
Bank of Hawaii
BOH
$2.72B
| $135K | ﹤0.01% |
+1,419
| New | +$135K |
|
888
Comscore
SCOR
$31.8M
| $135K | ﹤0.01% |
1,371
+1,350
| +6,429% | +$133K |
|
|
TVRD
889
Tvardi Therapeutics, Inc. Common Stock
TVRD
$300M
| $135K | ﹤0.01% |
234
+50
| +27% | +$28.8K |
|
|
PRTK
890
DELISTED
Paratek Pharmaceuticals, Inc.
PRTK
| $135K | ﹤0.01% |
33,640
+26,484
| +370% | +$106K |
|
|
WBC
891
DELISTED
WABCO HOLDINGS INC.
WBC
| $135K | ﹤0.01% |
1,000
+257
| +35% | +$34.7K |
|
|
SPPI
892
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $134K | ﹤0.01% |
37,079
+35,245
| +1,922% | +$127K |
|
|
VNTR
893
DELISTED
Venator Materials PLC
VNTR
| $134K | ﹤0.01% |
35,223
+25,433
| +260% | +$96.8K |
|
|
CNCE
894
DELISTED
Concert Pharmaceuticals, Inc.
CNCE
| $134K | ﹤0.01% |
14,605
+8,048
| +123% | +$73.8K |
|
895
iShares Core S&P Total US Stock Market ETF
ITOT
$76.1B
| $133K | ﹤0.01% |
1,836
+1,091
| +146% | +$79K |
|
896
B2Gold
BTG
$5.7B
| $132K | ﹤0.01% |
33,050
-6,098
| -16% | -$24.4K |
|
897
Lincoln National
LNC
$7.82B
| $132K | ﹤0.01% |
2,250
-20,028
| -90% | -$1.17M |
|
898
Toyota
TM
$258B
| $132K | ﹤0.01% |
941
-1,787
| -66% | -$251K |
|
899
iShares Russell 2000 Growth ETF
IWO
$12.5B
| $131K | ﹤0.01% |
+612
| New | +$131K |
|
900
La-Z-Boy
LZB
$1.43B
| $131K | ﹤0.01% |
4,164
+3,294
| +379% | +$104K |
|