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 | +$168M | |
| 2 | +$141M | |
| 3 | +$121M | |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| 1 | +$174M | |
| 2 | +$87.7M | |
| 3 | +$62.2M | |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| 1 | Technology | 28.63% |
| 2 | Communication Services | 10.32% |
| 3 | Consumer Discretionary | 9.84% |
| 4 | Healthcare | 9.22% |
| 5 | Industrials | 4.62% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
26
Nike
NKE
$66.5B
| $21M | 0.65% |
398,174
+118,948
|
|
||
27
Dow Inc
DOW
$24.4B
| $19M | 0.59% |
459,257
+161,937
|
|
||
28
PepsiCo
PEP
$197B
| $18.9M | 0.58% |
+121,557
|
|
||
29
State Street Materials Select Sector SPDR ETF
XLB
$7.97B
| $18.4M | 0.57% |
369,219
+258,561
|
|
||
|
30
Netflix
NFLX
$338B
| $17.8M | 0.55% |
184,871
-506,158
|
|
||
31
State Street Financial Select Sector SPDR ETF
XLF
$50B
| $17.6M | 0.54% |
355,726
+317,647
|
|
||
32
SoFi Technologies
SOFI
$21.3B
| $15.4M | 0.48% |
968,408
-837,994
|
|
||
33
GE Vernova
GEV
$253B
| $14.8M | 0.46% |
16,901
+6,190
|
|
||
|
NVO
34
Novo Nordisk
NVO
$194B
| $14.4M | 0.45% |
392,803
-624,359
|
|
||
35
Freeport-McMoran
FCX
$98.3B
| $14.4M | 0.45% |
244,754
-321,216
|
|
||
36
Booking.com
BKNG
$128B
| $14.1M | 0.44% |
83,500
-45,100
|
|
||
37
Charter Communications
CHTR
$17.9B
| $13.5M | 0.42% |
+62,565
|
|
||
38
Broadcom
AVGO
$1.82T
| $13.4M | 0.41% |
43,244
-188,929
|
|
||
39
Union Pacific
UNP
$162B
| $13.1M | 0.41% |
54,003
+51,913
|
|
||
|
B
40
Barrick Mining
B
$67.4B
| $12.2M | 0.38% |
297,916
+41,749
|
|
||
41
Morgan Stanley
MS
$338B
| $12M | 0.37% |
73,071
+5,845
|
|
||
42
Moderna
MRNA
$19.8B
| $11.2M | 0.35% |
219,573
+129,897
|
|
||
43
ServiceNow
NOW
$105B
| $10.1M | 0.31% |
96,638
+53,464
|
|
||
44
Apple
AAPL
$4.28T
| $10.1M | 0.31% |
39,784
-668,957
|
|
||
45
Astera Labs
ALAB
$62.9B
| $10.1M | 0.31% |
+91,866
|
|
||
46
AXT Inc
AXTI
$6.36B
| $9.89M | 0.31% |
173,574
+85,881
|
|
||
47
Invesco QQQ Trust
QQQ
$479B
| $9.41M | 0.29% |
+16,296
|
|
||
48
Elbit Systems
ESLT
$40B
| $9.38M | 0.29% |
11,042
+10,222
|
|
||
49
Zoetis
ZTS
$33.4B
| $8.83M | 0.27% |
74,697
+6,117
|
|
||
50
Alibaba
BABA
$271B
| $8.37M | 0.26% |
66,720
-161,380
|
|