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 | |
|---|---|---|---|---|---|---|
1176
CALL
Molson Coors Class B
TAP
$7.51B
| $6.07M | 0.01% |
117,400
+50,700
| +76% | +$2.62M |
|
1177
State Street SPDR S&P Biotech ETF
XBI
$10.2B
| $6.07M | 0.01% |
79,619
+11,288
| +17% | +$937K |
|
1178
CALL
Cardinal Health
CAH
$52.9B
| $6.05M | 0.01% |
80,200
-86,600
| -52% | -$6.53M |
|
1179
Albemarle
ALB
$13.8B
| $6.04M | 0.01% |
+27,305
| New | +$6.73M |
|
1180
CALL
Warner Music
WMG
$13.9B
| $6.03M | 0.01% |
180,600
+128,900
| +249% | +$4.34M |
|
1181
PUT
LKQ Corp
LKQ
$6.32B
| $6.02M | 0.01% |
106,000
+54,000
| +104% | +$3.04M |
|
1182
CALL
PENN Entertainment
PENN
$2.71B
| $5.99M | 0.01% |
202,100
-16,300
| -7% | -$505K |
|
|
XM
1183
CALL
DELISTED
Qualtrics International Inc. Class A Common Stock
XM
| $5.99M | 0.01% |
335,700
+286,600
| +584% | +$4.38M |
|
1184
CALL
Plains All American Pipeline
PAA
$17.4B
| $5.97M | 0.01% |
479,100
-28,200
| -6% | -$352K |
|
1185
CALL
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.14B
| $5.97M | 0.01% |
58,200
+13,700
| +31% | +$851K |
|
1186
CALL
Valvoline
VVV
$4.89B
| $5.97M | 0.01% |
170,800
+15,700
| +10% | +$546K |
|
1187
CALL
Live Nation Entertainment
LYV
$41B
| $5.95M | 0.01% |
85,000
-32,000
| -27% | -$2.35M |
|
1188
CALL
Axsome Therapeutics
AXSM
$12.4B
| $5.95M | 0.01% |
96,400
-88,700
| -48% | -$5.83M |
|
1189
PUT
Unilever
UL
$130B
| $5.95M | 0.01% |
101,778
-96,444
| -49% | -$5.48M |
|
|
LAZR
1190
CALL
DELISTED
Luminar Technologies
LAZR
| $5.93M | 0.01% |
60,927
+38,867
| +176% | +$4.08M |
|
1191
PUT
Bank OZK
OZK
$5.47B
| $5.92M | 0.01% |
173,000
+170,300
| +6,307% | +$7.15M |
|
1192
PUT
Archer Daniels Midland
ADM
$41.6B
| $5.91M | 0.01% |
74,200
+14,400
| +24% | +$1.18M |
|
1193
CALL
STMicroelectronics
STM
$47.7B
| $5.91M | 0.01% |
110,400
+42,500
| +63% | +$1.98M |
|
1194
PUT
XP
XP
$8.7B
| $5.88M | 0.01% |
495,700
+467,700
| +1,670% | +$6.66M |
|
1195
CALL
Teradyne
TER
$58.5B
| $5.87M | 0.01% |
54,600
+30,800
| +129% | +$3.15M |
|
1196
CALL
General Dynamics
GD
$103B
| $5.86M | 0.01% |
25,700
-5,900
| -19% | -$1.36M |
|
1197
CALL
Nu Holdings
NU
$68.5B
| $5.85M | 0.01% |
1,229,400
+605,800
| +97% | +$2.7M |
|
1198
PUT
C.H. Robinson
CHRW
$24.2B
| $5.84M | 0.01% |
58,800
+53,900
| +1,100% | +$5.31M |
|
1199
CALL
Fox Class B
FOX
$20.7B
| $5.84M | 0.01% |
172,000
+105,700
| +159% | +$3.31M |
|
|
CFLT
1200
CALL
DELISTED
Confluent
CFLT
| $5.84M | 0.01% |
242,500
+101,200
| +72% | +$2.35M |
|
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.