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 |
NVIDIA
NVDA
|
+$216M |
| 2 |
Apple
AAPL
|
+$159M |
| 3 |
Broadcom
AVGO
|
+$128M |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$141M |
| 2 |
Amazon
AMZN
|
+$53.1M |
| 3 |
TSMC
TSM
|
+$45.7M |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
NVIDIA
NVDA
$4.3T
| $392M | 0.22% |
2,481,314
+1,367,934
| +123% | +$216M |
|
|
2
Apple
AAPL
$3.64T
| $210M | 0.12% |
1,021,727
+772,959
| +311% | +$159M |
|
|
3
Broadcom
AVGO
$1.63T
| $152M | 0.09% |
551,694
+464,849
| +535% | +$128M |
|
|
4
iShares 20+ Year Treasury Bond ETF
TLT
$48.4B
| $129M | 0.07% |
1,457,996
-1,599,982
| -52% | -$141M |
|
5
Alphabet (Google) Class A
GOOGL
$3.08T
| $126M | 0.07% |
714,528
+168,881
| +31% | +$29.8M |
|
|
6
Booking.com
BKNG
$176B
| $78.5M | 0.05% |
13,563
+10,736
| +380% | +$62.2M |
|
7
Micron Technology
MU
$182B
| $75.9M | 0.04% |
616,179
-37,759
| -6% | -$4.65M |
|
|
8
Alphabet (Google) Class C
GOOG
$3.09T
| $63.5M | 0.04% |
357,870
+283,043
| +378% | +$50.2M |
|
|
9
TSMC
TSM
$1.37T
| $63.2M | 0.04% |
278,926
-201,596
| -42% | -$45.7M |
|
|
10
SPDR S&P 500 ETF Trust
SPY
$673B
| $61.9M | 0.04% |
+100,129
| New | +$61.9M |
|
11
Meta Platforms (Facebook)
META
$1.96T
| $58.7M | 0.03% |
+79,568
| New | +$58.7M |
|
12
UnitedHealth
UNH
$305B
| $56.2M | 0.03% |
180,167
+144,106
| +400% | +$45M |
|
13
Intel
INTC
$138B
| $54.7M | 0.03% |
2,441,452
-938,844
| -28% | -$21M |
|
14
Advanced Micro Devices
AMD
$255B
| $48.5M | 0.03% |
+342,008
| New | +$48.5M |
|
15
Health Care Select Sector SPDR Fund
XLV
$34.3B
| $45M | 0.03% |
333,580
+306,130
| +1,115% | +$41.3M |
|
16
iShares Russell 2000 ETF
IWM
$68.8B
| $41.6M | 0.02% |
+192,597
| New | +$41.6M |
|
17
Nike
NKE
$105B
| $37.1M | 0.02% |
522,792
-14,487
| -3% | -$1.03M |
|
18
Alibaba
BABA
$391B
| $35.7M | 0.02% |
+314,372
| New | +$35.7M |
|
19
Robinhood
HOOD
$111B
| $28.2M | 0.02% |
301,109
+201,736
| +203% | +$18.9M |
|
20
iShares MSCI Brazil ETF
EWZ
$5.71B
| $27.6M | 0.02% |
955,457
+869,110
| +1,007% | +$25.1M |
|
21
SPDR Gold Trust
GLD
$116B
| $26.2M | 0.02% |
+85,931
| New | +$26.2M |
|
22
Cigna
CI
$77.5B
| $25.4M | 0.01% |
76,861
-1,441
| -2% | -$476K |
|
23
SoFi Technologies
SOFI
$35.3B
| $25.1M | 0.01% |
1,380,363
+305,953
| +28% | +$5.57M |
|
24
Financial Select Sector SPDR Fund
XLF
$54.7B
| $23.7M | 0.01% |
+453,315
| New | +$23.7M |
|
25
KraneShares CSI China Internet ETF
KWEB
$9.34B
| $22.2M | 0.01% |
645,901
-4,332
| -0.7% | -$149K |
|