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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.43% |
| 2 | Technology | 0.41% |
| 3 | Healthcare | 0.21% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1576
CALL
PVH
PVH
$3.29B
| $3.35M | ﹤0.01% |
39,400
+16,200
| +70% | +$1.37M |
|
1577
CALL
Elastic
ESTC
$9.47B
| $3.33M | ﹤0.01% |
52,000
-33,600
| -39% | -$2.11M |
|
1578
CALL
Commercial Metals
CMC
$7.89B
| $3.33M | ﹤0.01% |
63,200
-1,000
| -2% | -$46.7K |
|
1579
CALL
FirstEnergy
FE
$27.1B
| $3.32M | ﹤0.01% |
85,500
-40,200
| -32% | -$1.58M |
|
1580
PUT
Clear Secure
YOU
$4.48B
| $3.31M | ﹤0.01% |
143,100
-6,700
| -4% | -$166K |
|
1581
Manchester United
MANU
$3.57B
| $3.31M | ﹤0.01% |
135,754
-48,154
| -26% | -$997K |
|
1582
CALL
Rapid7
RPD
$714M
| $3.31M | ﹤0.01% |
73,000
+18,900
| +35% | +$876K |
|
1583
PUT
Amphenol
APH
$205B
| $3.3M | ﹤0.01% |
155,600
+154,800
| +19,350% | +$3.01M |
|
|
WRK
1584
PUT
DELISTED
WestRock Company
WRK
| $3.3M | ﹤0.01% |
113,400
+102,500
| +940% | +$2.97M |
|
1585
PUT
Williams Companies
WMB
$92B
| $3.29M | ﹤0.01% |
101,000
+50,400
| +100% | +$1.51M |
|
1586
CALL
Winnebago Industries
WGO
$843M
| $3.29M | ﹤0.01% |
49,400
+11,300
| +30% | +$674K |
|
1587
CALL
Bloom Energy
BE
$83.3B
| $3.29M | ﹤0.01% |
201,400
-10,100
| -5% | -$163K |
|
|
JNPR
1588
PUT
DELISTED
Juniper Networks
JNPR
| $3.29M | ﹤0.01% |
105,100
+91,800
| +690% | +$2.83M |
|
1589
CALL
Organon & Co
OGN
$3.62B
| $3.29M | ﹤0.01% |
158,100
-54,600
| -26% | -$1.19M |
|
1590
PUT
Camping World
CWH
$423M
| $3.29M | ﹤0.01% |
109,300
+23,000
| +27% | +$579K |
|
|
SRG
1591
PUT
Seritage Growth Properties
SRG
$115M
| $3.29M | ﹤0.01% |
368,500
-14,400
| -4% | -$115K |
|
1592
PUT
Incyte
INCY
$25.5B
| $3.29M | ﹤0.01% |
52,800
+51,400
| +3,671% | +$3.44M |
|
1593
CALL
Vodafone
VOD
$40.1B
| $3.27M | ﹤0.01% |
346,300
+38,100
| +12% | +$400K |
|
1594
PUT
Fastenal
FAST
$56.8B
| $3.27M | ﹤0.01% |
110,800
+44,000
| +66% | +$1.2M |
|
1595
Hershey
HSY
$34.8B
| $3.26M | ﹤0.01% |
13,070
+11,151
| +581% | +$2.92M |
|
1596
CALL
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.35B
| $3.25M | ﹤0.01% |
32,400
-25,800
| -44% | -$1.59M |
|
1597
United States Natural Gas Fund
UNG
$562M
| $3.25M | ﹤0.01% |
109,418
-70,255
| -39% | -$1.9M |
|
|
GMS
1598
CALL
DELISTED
GMS Inc
GMS
| $3.25M | ﹤0.01% |
46,900
-13,100
| -22% | -$810K |
|
|
GRMN
1599
CALL
Garmin
GRMN
$53.7B
| $3.24M | ﹤0.01% |
31,100
+9,900
| +47% | +$1.01M |
|
1600
CALL
AMN Healthcare
AMN
$1.3B
| $3.24M | ﹤0.01% |
29,700
+13,300
| +81% | +$1.26M |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,349 increased, 3,911 reduced and 1,518 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 99% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,518 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.