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 | |
|---|---|---|---|---|---|---|
|
AMBR
1201
Amber International Holding Limited American Depositary Shares
AMBR
$390M
| $55K | ﹤0.01% |
+1,726
| New | +$55K |
|
|
AD
1202
Array Digital Infrastructure, Inc.
AD
$4.41B
| $54K | ﹤0.01% |
1,509
-4,247
| -74% | -$152K |
|
|
AKTS
1203
DELISTED
AKOUSTIS TECHNOLOGIES, INC.
AKTS
| $54K | ﹤0.01% |
6,750
+2,667
| +65% | +$21.3K |
|
1204
Alamos Gold
AGI
$13.9B
| $53K | ﹤0.01% |
8,893
+3,692
| +71% | +$22K |
|
1205
Antero Midstream
AM
$8.79B
| $53K | ﹤0.01% |
+7,033
| New | +$53K |
|
1206
Build-A-Bear
BBW
$962M
| $53K | ﹤0.01% |
16,467
+838
| +5% | +$2.7K |
|
1207
Oxford Industries
OXM
$604M
| $53K | ﹤0.01% |
+703
| New | +$53K |
|
1208
Parsons
PSN
$7.98B
| $53K | ﹤0.01% |
1,297
+236
| +22% | +$9.64K |
|
|
MYOV
1209
DELISTED
Myovant Sciences Ltd.
MYOV
| $53K | ﹤0.01% |
3,435
+3,335
| +3,335% | +$51.5K |
|
1210
Compugen
CGEN
$131M
| $52K | ﹤0.01% |
8,728
-20,305
| -70% | -$121K |
|
1211
Cincinnati Financial
CINF
$23.8B
| $52K | ﹤0.01% |
+504
| New | +$52K |
|
1212
FIVE9
FIVN
$1.95B
| $52K | ﹤0.01% |
+797
| New | +$52K |
|
1213
MannKind Corp
MNKD
$1.71B
| $52K | ﹤0.01% |
40,713
+19,432
| +91% | +$24.8K |
|
1214
Avantor
AVTR
$8.6B
| $51K | ﹤0.01% |
+2,861
| New | +$51K |
|
1215
Enova International
ENVA
$2.88B
| $51K | ﹤0.01% |
+2,140
| New | +$51K |
|
1216
Fortis
FTS
$24.7B
| $51K | ﹤0.01% |
+1,230
| New | +$51K |
|
1217
Heidrick & Struggles
HSII
$1.02B
| $51K | ﹤0.01% |
+1,590
| New | +$51K |
|
1218
Huron Consulting
HURN
$2.36B
| $51K | ﹤0.01% |
753
+85
| +13% | +$5.76K |
|
1219
LeMaitre Vascular
LMAT
$2.1B
| $51K | ﹤0.01% |
+1,419
| New | +$51K |
|
1220
Vicor
VICR
$2.25B
| $51K | ﹤0.01% |
1,092
-7,681
| -88% | -$359K |
|
|
ALTR
1221
DELISTED
Altair Engineering Inc. Class A Common Stock
ALTR
| $51K | ﹤0.01% |
+1,444
| New | +$51K |
|
|
BNFT
1222
DELISTED
Benefitfocus, Inc.
BNFT
| $51K | ﹤0.01% |
2,342
-4,841
| -67% | -$105K |
|
1223
Baxter International
BAX
$12.3B
| $50K | ﹤0.01% |
+600
| New | +$50K |
|
1224
Essential Properties Realty Trust
EPRT
$5.88B
| $50K | ﹤0.01% |
+2,023
| New | +$50K |
|
1225
IMAX
IMAX
$1.67B
| $50K | ﹤0.01% |
2,482
+1,430
| +136% | +$28.8K |
|