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 | |
|---|---|---|---|---|---|---|
201
CALL
T-Mobile US
TMUS
$208B
| $77.8M | 0.07% |
537,200
+191,500
| +55% | +$27.7M |
|
202
CALL
PepsiCo
PEP
$185B
| $77.8M | 0.07% |
426,600
+104,600
| +32% | +$18.3M |
|
203
CALL
Vanguard S&P 500 ETF
VOO
$979B
| $77.4M | 0.07% |
297,900
-83,700
| -22% | -$30.7M |
|
204
PUT
American Express
AXP
$236B
| $75.3M | 0.07% |
456,700
+90,100
| +25% | +$14.9M |
|
205
PUT
ON Semiconductor
ON
$35.8B
| $74.9M | 0.07% |
909,300
+228,200
| +34% | +$17.3M |
|
206
CALL
Roblox
RBLX
$36.2B
| $74.5M | 0.07% |
1,657,100
+396,800
| +31% | +$15.2M |
|
207
CALL
CVS Health
CVS
$140B
| $74.3M | 0.07% |
999,300
+537,100
| +116% | +$45M |
|
208
CALL
Eli Lilly
LLY
$1.04T
| $74M | 0.07% |
215,500
+35,700
| +20% | +$12M |
|
209
CALL
Freeport-McMoran
FCX
$92.5B
| $73.9M | 0.07% |
1,875,300
-504,300
| -21% | -$21M |
|
210
CALL
Target
TGT
$62.5B
| $73.5M | 0.06% |
443,600
-228,600
| -34% | -$37.6M |
|
211
CALL
BP
BP
$112B
| $73.3M | 0.06% |
1,931,100
-404,000
| -17% | -$15.1M |
|
212
CALL
Dollar Tree
DLTR
$23.7B
| $73.1M | 0.06% |
509,200
+335,600
| +193% | +$48.7M |
|
213
PUT
Zscaler
ZS
$23.2B
| $71.4M | 0.06% |
611,500
+355,100
| +138% | +$42.6M |
|
214
PUT
3M
MMM
$90.4B
| $71.1M | 0.06% |
809,333
+420,394
| +108% | +$39.6M |
|
215
PUT
Merck
MRK
$317B
| $70.6M | 0.06% |
812,100
-265,300
| -25% | -$28.6M |
|
216
CALL
Amgen
AMGN
$200B
| $70.6M | 0.06% |
292,200
+112,600
| +63% | +$27.6M |
|
|
217
CALL
ON Semiconductor
ON
$35.8B
| $70.4M | 0.06% |
855,300
+580,800
| +212% | +$44.1M |
|
218
PUT
Pfizer
PFE
$143B
| $70.4M | 0.06% |
1,725,100
-963,300
| -36% | -$41.6M |
|
219
PUT
Trade Desk
TTD
$8.4B
| $70.2M | 0.06% |
1,151,800
+309,700
| +37% | +$16.5M |
|
|
220
CALL
Merck
MRK
$317B
| $69.5M | 0.06% |
653,400
-440,300
| -40% | -$47.5M |
|
221
CALL
Baidu
BIDU
$36.6B
| $68.6M | 0.06% |
454,300
-124,600
| -22% | -$17.7M |
|
222
PUT
RH
RH
$3.3B
| $68.6M | 0.06% |
281,500
+177,300
| +170% | +$51.5M |
|
223
PUT
Oracle
ORCL
$364B
| $68.1M | 0.06% |
732,900
-350,900
| -32% | -$30.8M |
|
224
PUT
ServiceNow
NOW
$100B
| $67.2M | 0.06% |
723,500
-6,000
| -0.8% | -$523K |
|
225
PUT
Valero Energy
VLO
$93.1B
| $67M | 0.06% |
480,100
+97,600
| +26% | +$13.1M |
|
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.