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 |
Goldman Sachs
GS
|
+$38.4M |
| 2 |
Micron Technology
MU
|
+$23.7M |
| 3 |
NVIDIA
NVDA
|
+$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Top Sells
| 1 |
Citigroup
C
|
+$21.6M |
| 2 |
Apple
AAPL
|
+$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$13.3M |
| 4 |
Eli Lilly
LLY
|
+$9.69M |
| 5 |
Mastercard
MA
|
+$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
401
Allstate
ALL
$54.2B
| $590K | 0.03% |
+7,248
| New | +$590K |
|
402
CRA International
CRAI
$1.4B
| $589K | 0.03% |
+16,675
| New | +$589K |
|
|
XLNX
403
DELISTED
Xilinx Inc
XLNX
| $589K | 0.03% |
10,182
+9,497
| +1,386% | +$549K |
|
404
iShares MSCI Germany ETF
EWG
$2.39B
| $585K | 0.03% |
+20,364
| New | +$585K |
|
405
Affiliated Managers Group
AMG
$6.94B
| $581K | 0.03% |
3,547
-1,731
| -33% | -$284K |
|
406
Herbalife
HLF
$957M
| $581K | 0.03% |
+20,016
| New | +$581K |
|
407
Infosys
INFY
$72.8B
| $580K | 0.03% |
+73,522
| New | +$580K |
|
408
Essent Group
ESNT
$6.45B
| $578K | 0.03% |
+16,001
| New | +$578K |
|
409
Industrial Select Sector SPDR Fund
XLI
$23.5B
| $575K | 0.02% |
8,843
-2,936
| -25% | -$191K |
|
|
ATH
410
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $571K | 0.02% |
+11,426
| New | +$571K |
|
411
Edwards Lifesciences
EW
$43.8B
| $570K | 0.02% |
18,198
+13,686
| +303% | +$429K |
|
|
PRMW
412
DELISTED
Primo Water Corporation
PRMW
| $570K | 0.02% |
46,163
+23,603
| +105% | +$291K |
|
413
Verint Systems
VRNT
$1.22B
| $563K | 0.02% |
25,490
+20,253
| +387% | +$447K |
|
414
ICICI Bank
IBN
$114B
| $561K | 0.02% |
71,865
+32,850
| +84% | +$256K |
|
|
NATI
415
DELISTED
National Instruments Corp
NATI
| $560K | 0.02% |
+17,227
| New | +$560K |
|
416
Masimo
MASI
$7.77B
| $556K | 0.02% |
5,966
-1,879
| -24% | -$175K |
|
|
DBD
417
DELISTED
Diebold Nixdorf Incorporated
DBD
| $555K | 0.02% |
18,106
-5,436
| -23% | -$167K |
|
|
SGEN
418
DELISTED
Seagen Inc. Common Stock
SGEN
| $547K | 0.02% |
+8,703
| New | +$547K |
|
|
HTZ
419
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $547K | 0.02% |
35,914
+24,696
| +220% | +$376K |
|
420
National Beverage
FIZZ
$3.61B
| $544K | 0.02% |
+12,874
| New | +$544K |
|
|
WFT
421
DELISTED
Weatherford International plc
WFT
| $539K | 0.02% |
81,185
+22,720
| +39% | +$151K |
|
422
IPG Photonics
IPGP
$3.49B
| $535K | 0.02% |
+4,434
| New | +$535K |
|
423
Melco Resorts & Entertainment
MLCO
$3.76B
| $535K | 0.02% |
+28,870
| New | +$535K |
|
424
Ultragenyx Pharmaceutical
RARE
$2.81B
| $535K | 0.02% |
7,898
+700
| +10% | +$47.4K |
|
|
PTLA
425
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $535K | 0.02% |
13,655
+6,390
| +88% | +$250K |
|