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 | +$234M | |
| 2 | +$97.5M | |
| 3 | +$96.8M | |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.6M |
| 5 |
Pinduoduo
PDD
|
+$54.9M |
Top Sells
| 1 | +$129M | |
| 2 | +$92.9M | |
| 3 | +$82.9M | |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$68.4M |
| 5 |
Meta Platforms (Facebook)
META
|
+$59.2M |
Sector Composition
| 1 | Technology | 34.01% |
| 2 | Consumer Discretionary | 12.8% |
| 3 | Healthcare | 10.63% |
| 4 | Financials | 7.04% |
| 5 | Communication Services | 4.24% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
United Natural Foods
UNFI
$2.33B
| $2.81M | 0.06% |
74,827
+20,301
|
|
||
227
ProShares UltraPro Short S&P 500
SPXU
$482M
| $2.8M | 0.06% |
+51,901
|
|
||
228
Intuitive Machines
LUNR
$2.35B
| $2.8M | 0.06% |
266,395
+70,962
|
|
||
229
Zscaler
ZS
$23.4B
| $2.79M | 0.06% |
9,312
-676
|
|
||
230
TD Synnex
SNX
$12.6B
| $2.76M | 0.06% |
16,881
+16,324
|
|
||
231
State Street SPDR Portfolio S&P 500 Growth ETF
SPYG
$43.9B
| $2.73M | 0.06% |
26,114
-6,664
|
|
||
232
BigBear.ai
BBAI
$1.81B
| $2.72M | 0.06% |
417,708
-288,011
|
|
||
233
XP
XP
$11.2B
| $2.71M | 0.06% |
144,398
+92,718
|
|
||
|
GAP
234
The Gap Inc
GAP
$10.4B
| $2.68M | 0.06% |
125,359
-45,702
|
|
||
235
Zillow
Z
$10.7B
| $2.68M | 0.06% |
34,794
+33,684
|
|
||
236
NetEase
NTES
$72.8B
| $2.68M | 0.06% |
17,621
+5,936
|
|
||
237
Norfolk Southern
NSC
$70.7B
| $2.68M | 0.06% |
8,912
-1,049
|
|
||
238
Royal Gold
RGLD
$25.3B
| $2.66M | 0.06% |
13,283
+10,791
|
|
||
239
Abbott
ABT
$202B
| $2.63M | 0.06% |
19,656
-19,983
|
|
||
240
Eaton
ETN
$146B
| $2.62M | 0.06% |
+7,000
|
|
||
241
D.R. Horton
DHI
$46.5B
| $2.61M | 0.06% |
+15,400
|
|
||
242
Lemonade
LMND
$3.87B
| $2.61M | 0.06% |
48,755
+19,931
|
|
||
243
Edison International
EIX
$28.8B
| $2.6M | 0.06% |
47,022
+9,535
|
|
||
244
Norwegian Cruise Line
NCLH
$11.3B
| $2.59M | 0.06% |
105,268
-38,534
|
|
||
245
YieldMax MSTR Option Income Strategy ETF
MSTY
$1.05B
| $2.56M | 0.06% |
36,716
-4,622
|
|
||
246
Magnite
MGNI
$1.96B
| $2.55M | 0.06% |
117,045
+64,211
|
|
||
247
Intellia Therapeutics
NTLA
$1.6B
| $2.54M | 0.06% |
147,300
+70,523
|
|
||
248
KLA
KLAC
$200B
| $2.52M | 0.06% |
+2,339
|
|
||
249
FedEx
FDX
$91B
| $2.5M | 0.06% |
10,581
-5,171
|
|
||
250
Millicom
TIGO
$12.2B
| $2.49M | 0.06% |
51,353
+35,581
|
|