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 | +$73.1M | |
| 2 | +$51.8M | |
| 3 | +$46M | |
| 4 |
Meta Platforms (Facebook)
META
|
+$41.8M |
| 5 |
Alibaba
BABA
|
+$37.1M |
Top Sells
| 1 | +$262M | |
| 2 | +$194M | |
| 3 | +$149M | |
| 4 |
Apple
AAPL
|
+$119M |
| 5 |
Amazon
AMZN
|
+$107M |
Sector Composition
| 1 | Technology | 29.59% |
| 2 | Consumer Discretionary | 10.67% |
| 3 | Healthcare | 10.12% |
| 4 | Industrials | 8.86% |
| 5 | Communication Services | 7.94% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
276
Omeros
OMER
$803M
| $2.13M | 0.06% |
123,979
+101,759
|
|
||
277
Upstart Holdings
UPST
$2.64B
| $2.11M | 0.06% |
+48,172
|
|
||
278
Crocs
CROX
$3.97B
| $2.09M | 0.06% |
24,405
-57,291
|
|
||
279
State Street Financial Select Sector SPDR ETF
XLF
$45.9B
| $2.09M | 0.06% |
+38,079
|
|
||
280
Ciena
CIEN
$50.4B
| $2.07M | 0.06% |
+8,836
|
|
||
|
CRON
281
Cronos Group
CRON
$970M
| $2.06M | 0.06% |
781,566
+426,214
|
|
||
|
UNIT
282
Uniti Group
UNIT
$1.83B
| $2.05M | 0.06% |
292,751
+44,442
|
|
||
283
Western Alliance Bancorporation
WAL
$7.48B
| $2.05M | 0.06% |
24,365
+10,033
|
|
||
284
Capital One
COF
$113B
| $2.05M | 0.06% |
+8,445
|
|
||
285
Compass
COMP
$6.2B
| $2.04M | 0.06% |
+193,153
|
|
||
286
Eli Lilly
LLY
$880B
| $2.04M | 0.06% |
1,899
-23,734
|
|
||
|
CMA
287
DELISTED
Comerica
CMA
| $2.04M | 0.06% |
23,475
-6,005
|
|
||
288
Enviri
NVRI
$1.47B
| $2.04M | 0.06% |
113,638
+36,819
|
|
||
289
HDFC Bank
HDB
$149B
| $2.01M | 0.06% |
+55,130
|
|
||
290
PennyMac Financial
PFSI
$4.48B
| $2M | 0.06% |
15,151
+6,747
|
|
||
|
SKE
291
Skeena Resources
SKE
$3.62B
| $2M | 0.06% |
84,099
+67,582
|
|
||
292
Birkenstock
BIRK
$7.05B
| $1.98M | 0.06% |
48,446
+19,275
|
|
||
293
Moog Inc Class A
MOG.A
$9.7B
| $1.98M | 0.06% |
8,125
+7,401
|
|
||
294
Enova International
ENVA
$3.39B
| $1.96M | 0.06% |
12,470
+6,909
|
|
||
295
Carlyle Group
CG
$16.6B
| $1.96M | 0.06% |
+33,129
|
|
||
296
Coeur Mining
CDE
$12.9B
| $1.95M | 0.05% |
+109,228
|
|
||
297
Fastenal
FAST
$52.1B
| $1.94M | 0.05% |
48,450
-925
|
|
||
298
Guardant Health
GH
$11.4B
| $1.94M | 0.05% |
+18,994
|
|
||
|
KLAR
299
Klarna Group
KLAR
$5.66B
| $1.94M | 0.05% |
67,051
+52,264
|
|
||
300
Dynatrace
DT
$11.7B
| $1.94M | 0.05% |
44,681
-16,026
|
|