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 | |
|---|---|---|---|---|---|---|
|
SONC
251
DELISTED
Sonic Corp
SONC
| $378K | 0.04% |
11,947
+11,885
| +19,169% | +$376K |
|
252
Marvell Technology
MRVL
$54.6B
| $378K | 0.04% |
25,751
+21,187
| +464% | +$311K |
|
|
ATCO
253
DELISTED
Atlas Corp.
ATCO
| $377K | 0.04% |
20,709
+2,953
| +17% | +$53.8K |
|
254
Buckle
BKE
$3.03B
| $376K | 0.04% |
+7,368
| New | +$376K |
|
255
Sprouts Farmers Market
SFM
$13.6B
| $374K | 0.04% |
10,628
+6,409
| +152% | +$226K |
|
256
SL Green Realty
SLG
$4.4B
| $372K | 0.04% |
+2,995
| New | +$372K |
|
|
MWE
257
DELISTED
MARKWEST ENERGY PARTNERS, LP
MWE
| $371K | 0.04% |
+5,625
| New | +$371K |
|
258
Invesco CurrencyShares Australian Dollar Trust
FXA
$77.8M
| $370K | 0.04% |
+4,853
| New | +$370K |
|
259
United States Natural Gas Fund
UNG
$615M
| $369K | 0.04% |
+1,745
| New | +$369K |
|
|
VIAB
260
DELISTED
Viacom Inc. Class B
VIAB
| $365K | 0.04% |
+5,351
| New | +$365K |
|
261
Realty Income
O
$54.2B
| $364K | 0.04% |
+7,281
| New | +$364K |
|
|
NP
262
DELISTED
Neenah, Inc. Common Stock
NP
| $362K | 0.04% |
+5,801
| New | +$362K |
|
263
Trinity Industries
TRN
$2.31B
| $361K | 0.04% |
+14,155
| New | +$361K |
|
|
AKRX
264
DELISTED
Akorn, Inc.
AKRX
| $361K | 0.04% |
7,602
+5,183
| +214% | +$246K |
|
|
FMI
265
DELISTED
Foundation Medicine, Inc.
FMI
| $361K | 0.04% |
7,514
+1,682
| +29% | +$80.8K |
|
|
NBIS
266
Nebius Group N.V. Class A Ordinary Shares
NBIS
$15.6B
| $359K | 0.04% |
23,732
-37,623
| -61% | -$569K |
|
267
Anywhere Real Estate
HOUS
$724M
| $358K | 0.04% |
7,878
-4,609
| -37% | -$209K |
|
|
BPL
268
DELISTED
Buckeye Partners, L.P.
BPL
| $355K | 0.04% |
+4,712
| New | +$355K |
|
|
LO
269
DELISTED
LORILLARD INC COM STK
LO
| $354K | 0.04% |
+5,430
| New | +$354K |
|
270
Sherwin-Williams
SHW
$92.9B
| $353K | 0.04% |
+3,732
| New | +$353K |
|
271
Veeva Systems
VEEV
$44.7B
| $352K | 0.04% |
13,818
+12,852
| +1,330% | +$327K |
|
272
Invesco DB Agriculture Fund
DBA
$804M
| $350K | 0.04% |
+15,820
| New | +$350K |
|
273
HCI Group
HCI
$2.21B
| $350K | 0.04% |
+7,652
| New | +$350K |
|
274
Teradata
TDC
$1.99B
| $350K | 0.04% |
7,945
-13,402
| -63% | -$590K |
|
275
BP
BP
$87.4B
| $348K | 0.04% |
10,734
-21,586
| -67% | -$700K |
|