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 | |
|---|---|---|---|---|---|---|
1551
PUT
Herbalife
HLF
$1.23B
| $5.43M | ﹤0.01% |
540,100
+209,200
| +63% | +$2.25M |
|
1552
PUT
Fluor
FLR
$7.29B
| $5.42M | ﹤0.01% |
128,300
+72,400
| +130% | +$2.78M |
|
1553
CALL
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $5.4M | ﹤0.01% |
82,200
-23,100
| -22% | -$1.34M |
|
1554
Enphase Energy
ENPH
$4.84B
| $5.4M | ﹤0.01% |
44,647
-35,821
| -45% | -$4.18M |
|
1555
Teck Resources
TECK
$29.5B
| $5.39M | ﹤0.01% |
117,830
-602
| -0.5% | -$24.2K |
|
1556
CALL
Capri Holdings
CPRI
$1.77B
| $5.39M | ﹤0.01% |
119,000
-104,200
| -47% | -$4.97M |
|
1557
CALL
Freshpet
FRPT
$2.83B
| $5.38M | ﹤0.01% |
46,400
-31,900
| -41% | -$3.08M |
|
1558
PUT
Sempra
SRE
$60.8B
| $5.37M | ﹤0.01% |
74,800
-70,600
| -49% | -$5.06M |
|
1559
PUT
Helen of Troy
HELE
$663M
| $5.37M | ﹤0.01% |
46,600
-18,400
| -28% | -$2.2M |
|
1560
CALL
Vodafone
VOD
$34.9B
| $5.37M | ﹤0.01% |
603,000
+291,500
| +94% | +$2.53M |
|
1561
PUT
Elastic
ESTC
$6.1B
| $5.36M | ﹤0.01% |
53,500
-45,200
| -46% | -$5.21M |
|
1562
PUT
FirstEnergy
FE
$28.9B
| $5.36M | ﹤0.01% |
138,700
+2,300
| +2% | +$86K |
|
1563
Workday
WDAY
$33.4B
| $5.35M | ﹤0.01% |
+19,630
| New | +$5.59M |
|
1564
PUT
Teladoc Health
TDOC
$1.58B
| $5.35M | ﹤0.01% |
354,500
+231,600
| +188% | +$4.2M |
|
1565
PUT
Bausch Health
BHC
$1.65B
| $5.33M | ﹤0.01% |
502,600
-80,900
| -14% | -$707K |
|
1566
CALL
Tronox
TROX
$995M
| $5.33M | ﹤0.01% |
307,200
-7,600
| -2% | -$111K |
|
|
ABK
1567
CALL
DELISTED
Ambac Financial Group
ABK
| $5.32M | ﹤0.01% |
340,600
+176,900
| +108% | +$2.76M |
|
1568
PUT
Bumble
BMBL
$367M
| $5.32M | ﹤0.01% |
468,800
-268,700
| -36% | -$3.43M |
|
1569
Carvana
CVNA
$43.3B
| $5.31M | ﹤0.01% |
+301,970
| New | +$3.69M |
|
1570
CALL
TechnipFMC
FTI
$30.6B
| $5.3M | ﹤0.01% |
211,200
+38,800
| +23% | +$816K |
|
1571
CALL
Insulet
PODD
$11.3B
| $5.3M | ﹤0.01% |
30,900
-9,500
| -24% | -$1.77M |
|
|
SHNY
1572
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $5.27M | ﹤0.01% |
454,000
-71,900
| -14% | -$834K |
|
1573
CALL
Global E Online
GLBE
$6.08B
| $5.27M | ﹤0.01% |
144,900
+13,100
| +10% | +$486K |
|
|
SGI
1574
CALL
Somnigroup International
SGI
$15.1B
| $5.26M | ﹤0.01% |
92,600
+54,100
| +141% | +$2.82M |
|
1575
PUT
PENN Entertainment
PENN
$2.74B
| $5.26M | ﹤0.01% |
288,800
-600,300
| -68% | -$12.4M |
|
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.