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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
CALL
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $125M | 0.11% |
991,800
+278,100
| +39% | +$8.07M |
|
127
PUT
Johnson & Johnson
JNJ
$599B
| $124M | 0.11% |
802,600
+276,100
| +52% | +$44.6M |
|
128
PUT
CrowdStrike
CRWD
$195B
| $122M | 0.11% |
3,541,600
+1,228,000
| +53% | +$35.5M |
|
|
SCHW
129
PUT
Charles Schwab
SCHW
$178B
| $121M | 0.11% |
2,313,200
+1,691,000
| +272% | +$124M |
|
130
PUT
Coca-Cola
KO
$353B
| $119M | 0.1% |
1,915,200
-392,000
| -17% | -$23.7M |
|
131
PUT
Lam Research
LRCX
$403B
| $118M | 0.1% |
2,235,000
-291,000
| -12% | -$14.3M |
|
132
PUT
Procter & Gamble
PG
$345B
| $118M | 0.1% |
796,700
-233,400
| -23% | -$33.4M |
|
133
PUT
Union Pacific
UNP
$176B
| $117M | 0.1% |
583,100
+197,100
| +51% | +$39.9M |
|
134
PUT
Lowe's Companies
LOW
$115B
| $116M | 0.1% |
581,700
+233,200
| +67% | +$47.4M |
|
135
PUT
Wells Fargo
WFC
$261B
| $116M | 0.1% |
3,109,500
+225,500
| +8% | +$9.83M |
|
136
CALL
AbbVie
ABBV
$448B
| $116M | 0.1% |
729,100
+152,200
| +26% | +$23.3M |
|
137
CALL
IBM
IBM
$198B
| $116M | 0.1% |
888,300
-173,300
| -16% | -$23.2M |
|
138
PUT
Target
TGT
$63.4B
| $115M | 0.1% |
693,900
+274,100
| +65% | +$45.1M |
|
139
PUT
VanEck Durable High Dividend ETF
DURA
$38.1M
| $114M | 0.1% |
415,800
-119,600
| -22% | -$3.76M |
|
140
PUT
Occidental Petroleum
OXY
$56.2B
| $113M | 0.1% |
1,807,300
-584,300
| -24% | -$36.3M |
|
141
PUT
McDonald's
MCD
$188B
| $112M | 0.1% |
402,200
-44,100
| -10% | -$11.8M |
|
142
CALL
JD.com
JD
$41.1B
| $112M | 0.1% |
2,561,400
+366,700
| +17% | +$18.9M |
|
143
PUT
Cisco
CSCO
$442B
| $112M | 0.1% |
2,143,500
-382,000
| -15% | -$18.7M |
|
144
CALL
Shopify
SHOP
$160B
| $111M | 0.1% |
2,306,500
-502,100
| -18% | -$22.1M |
|
145
PUT
Booking.com
BKNG
$139B
| $110M | 0.1% |
1,032,500
-1,017,500
| -50% | -$99M |
|
146
PUT
Royal Caribbean
RCL
$77.2B
| $109M | 0.1% |
1,673,500
+308,500
| +23% | +$20.4M |
|
147
PUT
Starbucks
SBUX
$119B
| $109M | 0.1% |
1,047,200
-219,900
| -17% | -$22.9M |
|
148
PUT
Regeneron Pharmaceuticals
REGN
$70.5B
| $107M | 0.09% |
130,400
+74,400
| +133% | +$56.1M |
|
149
PUT
Moderna
MRNA
$23.7B
| $106M | 0.09% |
692,600
-91,300
| -12% | -$15.1M |
|
150
PUT
Intel
INTC
$530B
| $105M | 0.09% |
3,221,400
-208,300
| -6% | -$5.9M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.