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 |
Alphabet (Google) Class C
GOOG
|
$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 4 |
Alibaba
BABA
|
$9.66M |
| 5 |
Intel
INTC
|
$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
$36.8M |
| 2 |
Gilead Sciences
GILD
|
$31.2M |
| 3 |
Booking.com
BKNG
|
$29M |
| 4 |
Amazon
AMZN
|
$25.6M |
| 5 |
Baidu
BIDU
|
$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
GGP
401
DELISTED
GGP Inc.
GGP
| $229K | 0.03% |
+7,772
| New | +$229K |
|
402
TransDigm Group
TDG
$71.6B
| $228K | 0.03% |
+1,044
| New | +$228K |
|
|
DGI
403
DELISTED
DigitalGlobe Inc.
DGI
| $227K | 0.03% |
6,675
+4,987
| +295% | +$170K |
|
|
ANN
404
DELISTED
ANN INC
ANN
| $225K | 0.03% |
5,494
-1,733
| -24% | -$71K |
|
405
Automatic Data Processing
ADP
$120B
| $223K | 0.03% |
2,607
+2,307
| +769% | +$197K |
|
|
VER
406
DELISTED
VEREIT, Inc.
VER
| $223K | 0.03% |
4,547
+1,755
| +63% | +$86.1K |
|
|
SODA
407
DELISTED
SodaStream International Ltd
SODA
| $223K | 0.03% |
+11,028
| New | +$223K |
|
408
Fluor
FLR
$6.72B
| $222K | 0.03% |
+3,897
| New | +$222K |
|
409
iShares Russell Mid-Cap ETF
IWR
$44.6B
| $222K | 0.03% |
5,148
-10,912
| -68% | -$471K |
|
410
Alcoa
AA
$8.24B
| $220K | 0.03% |
7,117
+3,154
| +80% | +$97.5K |
|
411
Hartford Financial Services
HIG
$37B
| $219K | 0.03% |
+5,252
| New | +$219K |
|
412
SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$1.85B
| $219K | 0.03% |
1,062
-11,387
| -91% | -$2.35M |
|
|
WMC
413
DELISTED
Western Asset Mortgage Capital Corporation
WMC
| $219K | 0.03% |
1,455
+1,438
| +8,459% | +$216K |
|
414
Archer Daniels Midland
ADM
$30.2B
| $218K | 0.03% |
+4,600
| New | +$218K |
|
|
CST
415
DELISTED
CST Brands, Inc.
CST
| $218K | 0.03% |
+4,983
| New | +$218K |
|
|
FRAN
416
DELISTED
Francesca's Holdings Corporation
FRAN
| $216K | 0.03% |
1,014
+951
| +1,510% | +$203K |
|
417
Cintas
CTAS
$82.4B
| $215K | 0.03% |
+10,540
| New | +$215K |
|
418
Essex Property Trust
ESS
$17.3B
| $215K | 0.03% |
939
+557
| +146% | +$128K |
|
419
WisdomTree Europe SmallCap Dividend Fund
DFE
$179M
| $211K | 0.02% |
3,793
-948
| -20% | -$52.7K |
|
|
PE
420
DELISTED
PARSLEY ENERGY INC
PE
| $211K | 0.02% |
13,249
+7,909
| +148% | +$126K |
|
|
DNKN
421
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $211K | 0.02% |
4,452
-1,945
| -30% | -$92.2K |
|
422
GSK
GSK
$81.5B
| $210K | 0.02% |
3,654
-16,353
| -82% | -$940K |
|
423
ProShares UltraPro Short S&P 500
SPXU
$523M
| $210K | 0.02% |
+58
| New | +$210K |
|
424
Becton Dickinson
BDX
$55.1B
| $205K | 0.02% |
1,469
-2,898
| -66% | -$404K |
|
425
Core Laboratories
CLB
$592M
| $203K | 0.02% |
+1,952
| New | +$203K |
|