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 |
AMC Entertainment Holdings
AMC
|
$84.2M |
| 2 |
NVIDIA
NVDA
|
$35.3M |
| 3 |
AT&T
T
|
$28.5M |
| 4 |
Micron Technology
MU
|
$23.1M |
| 5 |
Baidu
BIDU
|
$22.7M |
Top Sells
| 1 |
Palantir
PLTR
|
$29.3M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$26.2M |
| 3 |
PARA
Paramount Global Class B
PARA
|
$21.7M |
| 4 |
Exxon Mobil
XOM
|
$18M |
| 5 |
Lam Research
LRCX
|
$16.3M |
Sector Composition
| 1 | Technology | 17.69% |
| 2 | Consumer Discretionary | 14.79% |
| 3 | Communication Services | 10.15% |
| 4 | Healthcare | 9.69% |
| 5 | Financials | 9.42% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
201
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$304M
| $2.97M | ﹤0.01% |
157,894
+41,148
| +35% | +$775K |
|
202
KraneShares CSI China Internet ETF
KWEB
$8.51B
| $2.95M | ﹤0.01% |
42,312
-28,497
| -40% | -$1.99M |
|
|
MNDT
203
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $2.95M | ﹤0.01% |
145,846
-28,971
| -17% | -$586K |
|
204
Ferrari
RACE
$88.2B
| $2.95M | ﹤0.01% |
14,293
-4,874
| -25% | -$1M |
|
205
Novo Nordisk
NVO
$252B
| $2.92M | ﹤0.01% |
69,834
+41,690
| +148% | +$1.75M |
|
|
NNDM
206
Nano Dimension
NNDM
$296M
| $2.88M | ﹤0.01% |
349,440
-57,672
| -14% | -$475K |
|
207
Microvast
MVST
$835M
| $2.86M | ﹤0.01% |
209,614
+163,084
| +350% | +$2.22M |
|
208
HubSpot
HUBS
$24.9B
| $2.84M | ﹤0.01% |
4,866
+2,721
| +127% | +$1.59M |
|
209
Tractor Supply
TSCO
$31.9B
| $2.82M | ﹤0.01% |
+75,880
| New | +$2.82M |
|
210
iShares MSCI Emerging Markets ETF
EEM
$19B
| $2.82M | ﹤0.01% |
51,112
+15,768
| +45% | +$869K |
|
211
General Motors
GM
$55B
| $2.82M | ﹤0.01% |
47,587
-109,941
| -70% | -$6.5M |
|
|
RDS.A
212
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $2.8M | ﹤0.01% |
69,240
-55,290
| -44% | -$2.23M |
|
|
JMIA
213
Jumia Technologies
JMIA
$958M
| $2.8M | ﹤0.01% |
92,213
-42,309
| -31% | -$1.28M |
|
214
MongoDB
MDB
$25.5B
| $2.79M | ﹤0.01% |
7,709
+2,519
| +49% | +$910K |
|
215
Invesco S&P 500 Equal Weight ETF
RSP
$73.5B
| $2.79M | ﹤0.01% |
18,488
+3,547
| +24% | +$535K |
|
216
DexCom
DXCM
$30.9B
| $2.77M | ﹤0.01% |
+25,932
| New | +$2.77M |
|
217
Direxion Daily Emerging Markets Bull 3X Shares
EDC
$84.2M
| $2.76M | ﹤0.01% |
25,706
+15,432
| +150% | +$1.66M |
|
218
Consumers Staples Select Sector SPDR Fund
XLP
$15.8B
| $2.75M | ﹤0.01% |
39,341
+36,316
| +1,201% | +$2.54M |
|
219
Phillips 66
PSX
$52.8B
| $2.73M | ﹤0.01% |
31,814
-8,143
| -20% | -$699K |
|
220
SPDR S&P Metals & Mining ETF
XME
$2.28B
| $2.73M | ﹤0.01% |
63,415
-15,094
| -19% | -$650K |
|
221
US Foods
USFD
$17.4B
| $2.73M | ﹤0.01% |
71,155
+57,378
| +416% | +$2.2M |
|
222
Nutrien
NTR
$27.6B
| $2.7M | ﹤0.01% |
44,557
+33,737
| +312% | +$2.04M |
|
223
Thermo Fisher Scientific
TMO
$183B
| $2.65M | ﹤0.01% |
5,259
-3,278
| -38% | -$1.65M |
|
224
Merck
MRK
$210B
| $2.63M | ﹤0.01% |
+33,780
| New | +$2.63M |
|
|
HIMX
225
Himax Technologies
HIMX
$1.43B
| $2.62M | ﹤0.01% |
157,243
+141,625
| +907% | +$2.36M |
|