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 | |
|---|---|---|---|---|---|---|
2026
CALL
Digital Turbine
APPS
$1.02B
| $1.82M | ﹤0.01% |
147,400
-111,400
| -43% | -$1.5M |
|
|
EXE
2027
PUT
Expand Energy Corp
EXE
$21.9B
| $1.82M | ﹤0.01% |
23,900
-6,400
| -21% | -$527K |
|
2028
PUT
Biohaven
BHVN
$2.16B
| $1.81M | ﹤0.01% |
132,700
-43,500
| -25% | -$692K |
|
2029
CALL
Bank of Hawaii
BOH
$3.33B
| $1.81M | ﹤0.01% |
34,800
+33,300
| +2,220% | +$2.34M |
|
2030
PUT
Labcorp
LH
$24.3B
| $1.81M | ﹤0.01% |
9,196
-1,746
| -16% | -$359K |
|
2031
CALL
Madison Square Garden
MSGS
$9.54B
| $1.81M | ﹤0.01% |
9,300
+9,000
| +3,000% | +$1.68M |
|
|
HTGCR
2032
CALL
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $1.81M | ﹤0.01% |
140,500
+99,000
| +239% | +$1.28M |
|
2033
CALL
BlackBerry
BB
$5.01B
| $1.81M | ﹤0.01% |
396,400
-276,300
| -41% | -$1.1M |
|
2034
Fox Class A
FOXA
$23.2B
| $1.81M | ﹤0.01% |
53,073
+52,305
| +6,811% | +$1.77M |
|
2035
CALL
McEwen Inc
MUX
$1.03B
| $1.81M | ﹤0.01% |
213,300
+127,600
| +149% | +$882K |
|
2036
CALL
Ionis Pharmaceuticals
IONS
$9.35B
| $1.8M | ﹤0.01% |
50,500
+12,900
| +34% | +$484K |
|
2037
CALL
Blackstone Mortgage Trust
BXMT
$2.82B
| $1.8M | ﹤0.01% |
100,900
+200
| +0.2% | +$4.27K |
|
2038
PUT
Camping World
CWH
$363M
| $1.8M | ﹤0.01% |
86,300
-42,900
| -33% | -$1M |
|
2039
PUT
Fastenal
FAST
$54B
| $1.8M | ﹤0.01% |
66,800
+40,400
| +153% | +$1.04M |
|
2040
CALL
Northern Oil and Gas
NOG
$2.3B
| $1.8M | ﹤0.01% |
59,300
-61,000
| -51% | -$1.9M |
|
|
FPI
2041
CALL
Farmland Partners
FPI
$419M
| $1.79M | ﹤0.01% |
167,300
+58,200
| +53% | +$681K |
|
|
BORR
2042
PUT
Borr Drilling
BORR
$1.31B
| $1.78M | ﹤0.01% |
235,100
+214,800
| +1,058% | +$1.38M |
|
2043
PUT
Melco Resorts & Entertainment
MLCO
$2.1B
| $1.78M | ﹤0.01% |
140,000
+28,000
| +25% | +$360K |
|
2044
CALL
Dover
DOV
$27.2B
| $1.78M | ﹤0.01% |
11,700
+7,200
| +160% | +$1.06M |
|
2045
CALL
Bio-Rad Laboratories Class A
BIO
$8.42B
| $1.77M | ﹤0.01% |
3,700
+2,500
| +208% | +$1.17M |
|
2046
PUT
Iron Mountain
IRM
$38.2B
| $1.77M | ﹤0.01% |
33,500
-146,200
| -81% | -$7.66M |
|
|
MAXN
2047
PUT
DELISTED
Maxeon Solar Technologies
MAXN
| $1.77M | ﹤0.01% |
667
+335
| +101% | +$714K |
|
|
PPL
2048
CALL
PPL Corp
PPL
$27.3B
| $1.77M | ﹤0.01% |
63,700
+16,300
| +34% | +$462K |
|
2049
DigitalOcean
DOCN
$14.4B
| $1.77M | ﹤0.01% |
+45,176
| New | +$1.42M |
|
2050
NXP Semiconductors
NXPI
$68B
| $1.77M | ﹤0.01% |
+9,490
| New | +$1.69M |
|
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.