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 | +$237M | |
| 2 | +$103M | |
| 3 | +$93.9M | |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.5M |
| 5 |
Pinduoduo
PDD
|
+$61.3M |
Top Sells
| 1 | +$129M | |
| 2 | +$108M | |
| 3 | +$89.1M | |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$79.3M |
| 5 |
Micron Technology
MU
|
+$64.3M |
Sector Composition
| 1 | Technology | 34.04% |
| 2 | Consumer Discretionary | 13.08% |
| 3 | Healthcare | 10.63% |
| 4 | Financials | 7.02% |
| 5 | Industrials | 3.96% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
United Natural Foods
UNFI
$2.4B
| $2.81M | ﹤0.01% |
74,827
+20,301
|
|
||
227
ProShares UltraPro Short S&P 500
SPXU
$530M
| $2.8M | ﹤0.01% |
+207,603
|
|
||
228
Intuitive Machines
LUNR
$1.06B
| $2.8M | ﹤0.01% |
266,395
+70,962
|
|
||
229
Zscaler
ZS
$49.1B
| $2.79M | ﹤0.01% |
9,312
-676
|
|
||
230
TD Synnex
SNX
$12.3B
| $2.76M | ﹤0.01% |
16,881
+16,324
|
|
||
231
State Street SPDR Portfolio S&P 500 Growth ETF
SPYG
$42.6B
| $2.73M | ﹤0.01% |
26,114
-6,664
|
|
||
232
BigBear.ai
BBAI
$2.77B
| $2.72M | ﹤0.01% |
417,708
-288,011
|
|
||
233
XP
XP
$10.2B
| $2.71M | ﹤0.01% |
144,398
+92,718
|
|
||
|
GAP
234
The Gap Inc
GAP
$9B
| $2.68M | ﹤0.01% |
125,359
-45,702
|
|
||
235
Zillow
Z
$17.3B
| $2.68M | ﹤0.01% |
34,794
+33,684
|
|
||
236
NetEase
NTES
$90.4B
| $2.68M | ﹤0.01% |
17,621
+5,936
|
|
||
237
Norfolk Southern
NSC
$63.9B
| $2.68M | ﹤0.01% |
8,912
-1,049
|
|
||
238
Royal Gold
RGLD
$16.2B
| $2.66M | ﹤0.01% |
13,283
+10,791
|
|
||
239
Abbott
ABT
$224B
| $2.63M | ﹤0.01% |
19,656
-19,983
|
|
||
240
Eaton
ETN
$139B
| $2.62M | ﹤0.01% |
+7,000
|
|
||
241
D.R. Horton
DHI
$42.6B
| $2.61M | ﹤0.01% |
+15,400
|
|
||
242
Lemonade
LMND
$5.26B
| $2.61M | ﹤0.01% |
48,755
+19,931
|
|
||
243
Edison International
EIX
$22.6B
| $2.6M | ﹤0.01% |
47,022
+9,535
|
|
||
244
Norwegian Cruise Line
NCLH
$8.56B
| $2.59M | ﹤0.01% |
105,268
-38,534
|
|
||
245
YieldMax MSTR Option Income Strategy ETF
MSTY
$2.46B
| $2.56M | ﹤0.01% |
183,580
-23,112
|
|
||
246
Magnite
MGNI
$2.02B
| $2.55M | ﹤0.01% |
117,045
+64,211
|
|
||
247
Intellia Therapeutics
NTLA
$1.05B
| $2.54M | ﹤0.01% |
147,300
+70,523
|
|
||
248
KLA
KLAC
$151B
| $2.52M | ﹤0.01% |
+2,339
|
|
||
249
FedEx
FDX
$63.3B
| $2.5M | ﹤0.01% |
10,581
-5,171
|
|
||
250
Millicom
TIGO
$8.5B
| $2.49M | ﹤0.01% |
51,353
+35,581
|
|