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 | |
|---|---|---|---|---|---|---|
176
CALL
Comcast
CMCSA
$85.1B
| $87.6M | 0.08% |
2,310,400
-790,600
| -25% | -$29.9M |
|
177
PUT
IBM
IBM
$198B
| $87.6M | 0.08% |
669,800
-319,500
| -32% | -$42.7M |
|
178
PUT
General Motors
GM
$71.7B
| $87.4M | 0.08% |
2,626,100
-8,700
| -0.3% | -$329K |
|
179
PUT
Intuit
INTU
$79.3B
| $86.3M | 0.08% |
193,500
+28,400
| +17% | +$11.7M |
|
180
CALL
Devon Energy
DVN
$50.9B
| $85.9M | 0.08% |
1,697,300
+278,300
| +20% | +$15.8M |
|
181
PUT
Strategy Inc
MSTR
$37B
| $85.7M | 0.08% |
2,931,000
+128,000
| +5% | +$3.12M |
|
182
PUT
iShares Silver Trust
SLV
$28.4B
| $85.3M | 0.08% |
3,856,400
-610,800
| -14% | -$12.7M |
|
183
PUT
Humana
HUM
$47.8B
| $85.2M | 0.07% |
175,500
+46,500
| +36% | +$23M |
|
184
PUT
JD.com
JD
$41.1B
| $84.4M | 0.07% |
1,923,000
+387,000
| +25% | +$20M |
|
185
PUT
MongoDB
MDB
$24.7B
| $83.3M | 0.07% |
357,200
+12,900
| +4% | +$2.71M |
|
|
SCHW
186
CALL
Charles Schwab
SCHW
$174B
| $83.2M | 0.07% |
1,589,100
+1,046,600
| +193% | +$76.6M |
|
187
CALL
Pinduoduo
PDD
$121B
| $82.8M | 0.07% |
1,091,100
-201,600
| -16% | -$18.2M |
|
188
PUT
Roku
ROKU
$21.4B
| $82.7M | 0.07% |
1,257,200
+338,900
| +37% | +$19.8M |
|
|
UWC
189
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $82.6M | 0.07% |
2,742,800
+1,159,700
| +73% | +$34.9M |
|
190
PUT
Blackstone
BX
$151B
| $82.2M | 0.07% |
935,500
-115,100
| -11% | -$10.2M |
|
|
DOCU
191
PUT
DocuSign
DOCU
$9.99B
| $81.5M | 0.07% |
1,398,200
+623,300
| +80% | +$37.2M |
|
|
UWC
192
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $80.8M | 0.07% |
2,723,100
-44,100
| -2% | -$1.31M |
|
193
CALL
Proshares UltraShort Technology
REW
$3.27M
| $80.2M | 0.07% |
380,788
+18,000
| +5% | +$2.49M |
|
|
194
CALL
Blackstone
BX
$151B
| $80.2M | 0.07% |
912,900
+337,900
| +59% | +$29.8M |
|
195
PUT
Eli Lilly
LLY
$1.02T
| $79.7M | 0.07% |
232,000
-9,200
| -4% | -$3.1M |
|
196
CALL
Lockheed Martin
LMT
$117B
| $79.6M | 0.07% |
168,300
-76,200
| -31% | -$35.7M |
|
197
CALL
Starbucks
SBUX
$119B
| $79.3M | 0.07% |
761,300
-507,300
| -40% | -$52.8M |
|
198
PUT
Deere & Co
DE
$158B
| $79.2M | 0.07% |
191,900
+2,500
| +1% | +$1.04M |
|
199
PUT
Shopify
SHOP
$160B
| $78.6M | 0.07% |
1,639,300
-1,375,300
| -46% | -$60.5M |
|
200
CALL
Valero Energy
VLO
$93.5B
| $78.5M | 0.07% |
562,100
+418,300
| +291% | +$56.2M |
|
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.