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 | |
|---|---|---|---|---|---|---|
901
PUT
SAP
SAP
$171B
| $14.5M | 0.01% |
74,100
-120,400
| -62% | -$21.4M |
|
902
PUT
Sherwin-Williams
SHW
$76.6B
| $14.4M | 0.01% |
41,600
-2,300
| -5% | -$733K |
|
903
PUT
IQVIA
IQV
$34.6B
| $14.4M | 0.01% |
57,100
+53,100
| +1,328% | +$12.4M |
|
904
PUT
Match Group
MTCH
$8.72B
| $14.4M | 0.01% |
396,100
-282,500
| -42% | -$10.2M |
|
905
CALL
AMC Entertainment Holdings
AMC
$2.04B
| $14.3M | 0.01% |
3,848,700
-1,379,000
| -26% | -$6.14M |
|
906
PUT
Dow Inc
DOW
$22.3B
| $14.3M | 0.01% |
246,900
-316,700
| -56% | -$17.5M |
|
907
Sea Limited
SE
$60.9B
| $14.3M | 0.01% |
265,457
-182,065
| -41% | -$8.37M |
|
908
PUT
Mobileye
MBLY
$6.29B
| $14.3M | 0.01% |
443,300
-85,000
| -16% | -$2.41M |
|
|
BNY
909
PUT
Bank of New York Mellon
BNY
$109B
| $14.2M | 0.01% |
246,800
+19,800
| +9% | +$1.09M |
|
910
PUT
Prudential Financial
PRU
$40.9B
| $14.2M | 0.01% |
184,600
+53,400
| +41% | +$5.75M |
|
911
CALL
Tenet Healthcare
THC
$17.1B
| $14.2M | 0.01% |
134,700
-61,300
| -31% | -$5.51M |
|
912
PUT
GE HealthCare
GEHC
$28.2B
| $14.2M | 0.01% |
155,700
+76,200
| +96% | +$6.34M |
|
913
PUT
Western Alliance Bancorporation
WAL
$9.06B
| $14.2M | 0.01% |
220,500
+74,800
| +51% | +$4.59M |
|
914
CALL
C.H. Robinson
CHRW
$24.2B
| $14.1M | 0.01% |
185,600
+1,400
| +0.8% | +$109K |
|
915
PUT
Stellantis
STLA
$16.7B
| $14.1M | 0.01% |
498,900
+115,800
| +30% | +$2.88M |
|
916
PUT
Veeva Systems
VEEV
$29.2B
| $14.1M | 0.01% |
60,700
-13,000
| -18% | -$2.81M |
|
917
PUT
Reddit
RDDT
$32.5B
| $14.1M | 0.01% |
+285,100
| New | +$15.6M |
|
918
CALL
Sprott Junior Uranium Miners ETF
URNJ
$322M
| $14M | 0.01% |
291,400
-47,800
| -14% | -$1.24M |
|
919
CALL
Antero Resources
AR
$10.9B
| $14M | 0.01% |
482,800
-577,000
| -54% | -$13.9M |
|
920
PUT
Sphere Entertainment
SPHR
$4.77B
| $14M | 0.01% |
285,100
-193,300
| -40% | -$7.75M |
|
921
PUT
CAVA Group
CAVA
$7.36B
| $13.9M | 0.01% |
198,600
-114,100
| -36% | -$6.12M |
|
922
PUT
Steel Dynamics
STLD
$34.7B
| $13.9M | 0.01% |
93,700
+21,500
| +30% | +$2.7M |
|
923
PUT
Energy Transfer Partners
ET
$70.3B
| $13.9M | 0.01% |
882,000
-36,900
| -4% | -$537K |
|
924
CALL
Baker Hughes
BKR
$55.6B
| $13.9M | 0.01% |
413,900
+46,600
| +13% | +$1.44M |
|
925
CALL
GoDaddy
GDDY
$11.6B
| $13.9M | 0.01% |
116,800
-90,400
| -44% | -$10.1M |
|
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.