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 |
Microsoft
MSFT
|
+$101M |
| 2 |
NVIDIA
NVDA
|
+$66M |
| 3 |
Citigroup
C
|
+$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
+$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$64M |
| 3 |
Meta Platforms (Facebook)
META
|
+$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
+$34.3M |
| 5 |
PayPal
PYPL
|
+$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
326
BGC Group
BGC
$4.76B
| $1.15M | ﹤0.01% |
365,382
+179,504
| +97% | +$563K |
|
327
Box
BOX
$4.86B
| $1.15M | ﹤0.01% |
46,997
+8,579
| +22% | +$209K |
|
328
Charles Schwab
SCHW
$170B
| $1.15M | ﹤0.01% |
+15,950
| New | +$1.15M |
|
329
Liberty Global Class A
LBTYA
$3.94B
| $1.15M | ﹤0.01% |
+73,488
| New | +$1.15M |
|
330
Quanterix
QTRX
$199M
| $1.15M | ﹤0.01% |
103,913
+102,418
| +6,851% | +$1.13M |
|
331
FTAI Aviation
FTAI
$17B
| $1.14M | ﹤0.01% |
+76,349
| New | +$1.14M |
|
332
Direxion Daily Emerging Markets Bear 3x Shares
EDZ
$12.3M
| $1.14M | ﹤0.01% |
+56,056
| New | +$1.14M |
|
333
Tapestry
TPR
$21.9B
| $1.14M | ﹤0.01% |
+39,953
| New | +$1.14M |
|
334
Kornit Digital
KRNT
$675M
| $1.13M | ﹤0.01% |
+42,626
| New | +$1.13M |
|
|
DM
335
DELISTED
Desktop Metal, Inc.
DM
| $1.13M | ﹤0.01% |
43,769
-10,833
| -20% | -$280K |
|
336
Ciena
CIEN
$17.3B
| $1.13M | ﹤0.01% |
+27,899
| New | +$1.13M |
|
337
Vanguard High Dividend Yield ETF
VYM
$64.2B
| $1.13M | ﹤0.01% |
+11,859
| New | +$1.13M |
|
338
DoorDash
DASH
$110B
| $1.12M | ﹤0.01% |
22,743
-49,738
| -69% | -$2.46M |
|
339
Carlisle Companies
CSL
$16.3B
| $1.12M | ﹤0.01% |
4,005
+3,504
| +699% | +$983K |
|
340
Sabesp
SBS
$15.6B
| $1.12M | ﹤0.01% |
122,995
+28,687
| +30% | +$261K |
|
341
Peabody Energy
BTU
$2.25B
| $1.11M | ﹤0.01% |
44,735
-128,258
| -74% | -$3.18M |
|
342
Par Pacific Holdings
PARR
$1.84B
| $1.1M | ﹤0.01% |
67,181
+55,112
| +457% | +$904K |
|
343
Bath & Body Works
BBWI
$5.82B
| $1.1M | ﹤0.01% |
33,737
+5,057
| +18% | +$165K |
|
344
ArcelorMittal
MT
$25.7B
| $1.08M | ﹤0.01% |
54,080
-99,299
| -65% | -$1.98M |
|
|
PXD
345
DELISTED
Pioneer Natural Resource Co.
PXD
| $1.07M | ﹤0.01% |
4,936
-11,685
| -70% | -$2.53M |
|
346
iShares US Oil & Gas Exploration & Production ETF
IEO
$467M
| $1.07M | ﹤0.01% |
12,801
-16,095
| -56% | -$1.34M |
|
347
Otis Worldwide
OTIS
$34.5B
| $1.06M | ﹤0.01% |
16,626
-13,855
| -45% | -$883K |
|
|
WEBR
348
DELISTED
Weber Inc.
WEBR
| $1.05M | ﹤0.01% |
159,666
+135,425
| +559% | +$890K |
|
349
Amplify Energy
AMPY
$155M
| $1.05M | ﹤0.01% |
159,451
+40,583
| +34% | +$266K |
|
350
Spirit AeroSystems
SPR
$4.8B
| $1.05M | ﹤0.01% |
+47,784
| New | +$1.05M |
|