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 |
Amazon
AMZN
|
+$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$26.1M |
| 4 |
Booking.com
BKNG
|
+$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$42.8M |
| 2 |
Amgen
AMGN
|
+$32.3M |
| 3 |
Baidu
BIDU
|
+$21.9M |
| 4 |
Micron Technology
MU
|
+$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
+$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1201
Liquidity Services
LQDT
$851M
| $30K | ﹤0.01% |
5,234
-29,047
| -85% | -$166K |
|
|
POLY
1202
DELISTED
Plantronics, Inc.
POLY
| $30K | ﹤0.01% |
690
-346
| -33% | -$15K |
|
|
KOL
1203
DELISTED
VanEck Vectors Coal ETF
KOL
| $30K | ﹤0.01% |
207
-1,484
| -88% | -$215K |
|
|
FOMX
1204
DELISTED
Foamix Pharmaceuticals Ltd. Ordinary Shares
FOMX
| $30K | ﹤0.01% |
5,541
-7,393
| -57% | -$40K |
|
1205
Calavo Growers
CVGW
$496M
| $29K | ﹤0.01% |
+404
| New | +$29K |
|
1206
QuinStreet
QNST
$939M
| $29K | ﹤0.01% |
+3,956
| New | +$29K |
|
1207
Teucrium Soybean Fund
SOYB
$25.4M
| $29K | ﹤0.01% |
1,629
-4,760
| -75% | -$84.7K |
|
|
VIA
1208
DELISTED
Viacom Inc. Class A
VIA
| $29K | ﹤0.01% |
795
-1,310
| -62% | -$47.8K |
|
|
LPNT
1209
DELISTED
LifePoint Health, Inc.
LPNT
| $29K | ﹤0.01% |
+504
| New | +$29K |
|
1210
Bruker
BRKR
$4.87B
| $28K | ﹤0.01% |
+963
| New | +$28K |
|
1211
Groupon
GRPN
$950M
| $28K | ﹤0.01% |
270
-1,839
| -87% | -$191K |
|
1212
Standard BioTools
LAB
$508M
| $28K | ﹤0.01% |
5,561
-842
| -13% | -$4.24K |
|
1213
Martin Midstream Partners
MMLP
$122M
| $28K | ﹤0.01% |
+1,819
| New | +$28K |
|
1214
ProAssurance
PRA
$1.22B
| $28K | ﹤0.01% |
524
+481
| +1,119% | +$25.7K |
|
1215
Radian Group
RDN
$4.81B
| $28K | ﹤0.01% |
+1,499
| New | +$28K |
|
1216
TTEC Holdings
TTEC
$179M
| $28K | ﹤0.01% |
688
-2,867
| -81% | -$117K |
|
1217
Real Estate Select Sector SPDR Fund
XLRE
$7.84B
| $28K | ﹤0.01% |
+890
| New | +$28K |
|
|
XRM
1218
DELISTED
Xerium Technologies Inc (new)
XRM
| $28K | ﹤0.01% |
5,942
-5,671
| -49% | -$26.7K |
|
1219
Ardelyx
ARDX
$1.61B
| $27K | ﹤0.01% |
4,977
+2,802
| +129% | +$15.2K |
|
1220
Comstock Resources
CRK
$4.69B
| $27K | ﹤0.01% |
4,534
-20,326
| -82% | -$121K |
|
1221
Diodes
DIOD
$2.52B
| $27K | ﹤0.01% |
+914
| New | +$27K |
|
|
FARO
1222
DELISTED
Faro Technologies
FARO
| $27K | ﹤0.01% |
716
+375
| +110% | +$14.1K |
|
1223
Paylocity
PCTY
$9.48B
| $27K | ﹤0.01% |
571
-137
| -19% | -$6.48K |
|
1224
Rockwell Medical
RMTI
$58.2M
| $27K | ﹤0.01% |
290
+45
| +18% | +$4.19K |
|
1225
Strategic Education
STRA
$2.02B
| $27K | ﹤0.01% |
320
+146
| +84% | +$12.3K |
|