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 |
Alibaba
BABA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$97.6M |
| 3 |
Walt Disney
DIS
|
+$73.4M |
| 4 |
Citigroup
C
|
+$45.8M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.5M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$149M |
| 2 |
Amazon
AMZN
|
+$107M |
| 3 |
SPDR Gold Trust
GLD
|
+$58.6M |
| 4 |
Coinbase
COIN
|
+$56.5M |
| 5 |
NVIDIA
NVDA
|
+$48.2M |
Sector Composition
| 1 | Technology | 16.06% |
| 2 | Consumer Discretionary | 14.45% |
| 3 | Communication Services | 10.03% |
| 4 | Financials | 9.44% |
| 5 | Healthcare | 9.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
276
Sun Country Airlines
SNCY
$684M
| $2.08M | ﹤0.01% |
132,189
+24,097
| +22% | +$379K |
|
277
Paychex
PAYX
$48.7B
| $2.08M | ﹤0.01% |
17,436
-21,768
| -56% | -$2.59M |
|
278
Macy's
M
$4.57B
| $2.05M | ﹤0.01% |
101,690
-299,772
| -75% | -$6.03M |
|
279
Chipotle Mexican Grill
CMG
$53.2B
| $1.99M | ﹤0.01% |
+43,550
| New | +$1.99M |
|
280
Edison International
EIX
$20.5B
| $1.99M | ﹤0.01% |
27,767
+19,345
| +230% | +$1.38M |
|
281
Direxion Daily Small Cap Bear 3x Shares
TZA
$285M
| $1.97M | ﹤0.01% |
+98,988
| New | +$1.97M |
|
282
Direxion Daily S&P Oil & Gas Exp & Prod Bull 2X Shares
GUSH
$243M
| $1.94M | ﹤0.01% |
+59,470
| New | +$1.94M |
|
|
LTHM
283
DELISTED
Livent Corporation
LTHM
| $1.93M | ﹤0.01% |
107,125
+104,475
| +3,942% | +$1.88M |
|
284
Banco Macro
BMA
$2.88B
| $1.92M | ﹤0.01% |
66,834
+32,871
| +97% | +$943K |
|
285
Herbalife
HLF
$1.02B
| $1.92M | ﹤0.01% |
125,734
+75,226
| +149% | +$1.15M |
|
286
Tradeweb Markets
TW
$25.5B
| $1.92M | ﹤0.01% |
21,109
+18,710
| +780% | +$1.7M |
|
|
GTM
287
ZoomInfo Technologies
GTM
$3.39B
| $1.91M | ﹤0.01% |
103,248
+70,552
| +216% | +$1.3M |
|
288
Booking.com
BKNG
$181B
| $1.91M | ﹤0.01% |
538
-1,596
| -75% | -$5.66M |
|
289
Arthur J. Gallagher & Co
AJG
$76.7B
| $1.91M | ﹤0.01% |
8,481
+3,887
| +85% | +$874K |
|
290
Amylyx Pharmaceuticals
AMLX
$931M
| $1.91M | ﹤0.01% |
129,422
+106,870
| +474% | +$1.57M |
|
291
Dollar General
DG
$23.9B
| $1.9M | ﹤0.01% |
13,991
-12,464
| -47% | -$1.69M |
|
292
Asana
ASAN
$3.25B
| $1.9M | ﹤0.01% |
99,789
+52,080
| +109% | +$990K |
|
293
Acadia Pharmaceuticals
ACAD
$4.28B
| $1.89M | ﹤0.01% |
60,365
-19,023
| -24% | -$596K |
|
294
Organon & Co
OGN
$2.72B
| $1.88M | ﹤0.01% |
+130,095
| New | +$1.88M |
|
295
MGM Resorts International
MGM
$9.85B
| $1.87M | ﹤0.01% |
41,879
-66,519
| -61% | -$2.97M |
|
296
Murphy Oil
MUR
$3.61B
| $1.86M | ﹤0.01% |
43,643
+40,052
| +1,115% | +$1.71M |
|
297
Alexandria Real Estate Equities
ARE
$14.6B
| $1.86M | ﹤0.01% |
+14,673
| New | +$1.86M |
|
298
Entergy
ETR
$38.8B
| $1.85M | ﹤0.01% |
36,596
+27,768
| +315% | +$1.4M |
|
299
Industrial Select Sector SPDR Fund
XLI
$23.2B
| $1.85M | ﹤0.01% |
+16,233
| New | +$1.85M |
|
300
Aurinia Pharmaceuticals
AUPH
$1.62B
| $1.84M | ﹤0.01% |
204,535
-17,091
| -8% | -$154K |
|