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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1126
PUT
LyondellBasell Industries
LYB
$19.5B
| $10M | 0.01% |
97,900
-89,000
| -48% | -$8.66M |
|
1127
CALL
Royal Bank of Canada
RY
$291B
| $10M | 0.01% |
99,200
-48,600
| -33% | -$4.8M |
|
1128
CALL
Trane Technologies
TT
$106B
| $10M | 0.01% |
33,300
+26,400
| +383% | +$7.17M |
|
|
SEE
1129
PUT
DELISTED
Sealed Air
SEE
| $9.98M | 0.01% |
268,400
+86,900
| +48% | +$3.12M |
|
1130
PUT
NetApp
NTAP
$32.9B
| $9.98M | 0.01% |
95,100
-6,200
| -6% | -$575K |
|
1131
PUT
Logitech
LOGI
$15.2B
| $9.96M | 0.01% |
111,500
-110,400
| -50% | -$9.86M |
|
1132
CALL
Southern Copper
SCCO
$141B
| $9.96M | 0.01% |
100,860
+13,916
| +16% | +$1.11M |
|
|
1133
CALL
LyondellBasell Industries
LYB
$19.5B
| $9.94M | 0.01% |
97,200
+45,700
| +89% | +$4.45M |
|
1134
CALL
Deckers Outdoor
DECK
$13.3B
| $9.88M | 0.01% |
63,000
-66,000
| -51% | -$9.15M |
|
1135
Humana
HUM
$46.7B
| $9.83M | 0.01% |
28,362
-32,673
| -54% | -$12.4M |
|
1136
CALL
Tyler Technologies
TYL
$12.2B
| $9.82M | 0.01% |
23,100
-12,600
| -35% | -$5.38M |
|
1137
PUT
XPeng
XPEV
$11.8B
| $9.81M | 0.01% |
1,278,100
+55,300
| +5% | +$536K |
|
1138
CALL
SAP
SAP
$187B
| $9.79M | 0.01% |
50,200
-5,700
| -10% | -$1.01M |
|
1139
CALL
KB Home
KBH
$3.48B
| $9.73M | 0.01% |
137,300
-19,700
| -13% | -$1.26M |
|
1140
iShares Russell 1000 Value ETF
IWD
$82B
| $9.73M | 0.01% |
54,315
+22,475
| +71% | +$3.8M |
|
1141
PUT
Tradeweb Markets
TW
$21.3B
| $9.71M | 0.01% |
93,200
-15,500
| -14% | -$1.56M |
|
1142
PUT
Apollo Global Management
APO
$70.7B
| $9.7M | 0.01% |
86,300
-465,300
| -84% | -$49.1M |
|
1143
CALL
Global Payments
GPN
$22.1B
| $9.7M | 0.01% |
72,600
-26,800
| -27% | -$3.54M |
|
1144
PUT
Bank of Montreal
BMO
$125B
| $9.65M | 0.01% |
98,800
-1,200
| -1% | -$113K |
|
1145
PUT
Danaos Corp
DAC
$2.55B
| $9.64M | 0.01% |
133,600
-33,200
| -20% | -$2.45M |
|
1146
PUT
STMicroelectronics
STM
$46B
| $9.6M | 0.01% |
222,000
+111,500
| +101% | +$5.03M |
|
1147
PUT
Arthur J. Gallagher & Co
AJG
$63.7B
| $9.58M | 0.01% |
38,300
-7,400
| -16% | -$1.78M |
|
1148
PUT
Xcel Energy
XEL
$51B
| $9.56M | 0.01% |
177,900
+106,200
| +148% | +$6.06M |
|
1149
CALL
Blackstone Mortgage Trust
BXMT
$2.82B
| $9.56M | 0.01% |
480,000
+45,500
| +10% | +$916K |
|
1150
CALL
Teck Resources
TECK
$29.5B
| $9.55M | 0.01% |
208,700
-91,500
| -30% | -$3.67M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.