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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1601
PUT
Toast
TOST
$16.8B
| $3.46M | ﹤0.01% |
184,900
+85,200
| +85% | +$1.85M |
|
|
JWN
1602
CALL
DELISTED
Nordstrom
JWN
| $3.46M | ﹤0.01% |
231,700
+11,600
| +5% | +$213K |
|
1603
Elbit Systems
ESLT
$38.4B
| $3.46M | ﹤0.01% |
17,469
+13,951
| +397% | +$2.86M |
|
1604
CALL
Neogen
NEOG
$2.05B
| $3.46M | ﹤0.01% |
186,500
+158,900
| +576% | +$3.46M |
|
|
SPR
1605
PUT
DELISTED
Spirit AeroSystems
SPR
| $3.46M | ﹤0.01% |
214,100
+146,500
| +217% | +$3.37M |
|
1606
Sony
SONY
$123B
| $3.45M | ﹤0.01% |
209,245
+163,550
| +358% | +$2.85M |
|
|
LAZR
1607
CALL
DELISTED
Luminar Technologies
LAZR
| $3.44M | ﹤0.01% |
50,453
-5,020
| -9% | -$460K |
|
1608
CALL
StoneCo
STNE
$2.62B
| $3.44M | ﹤0.01% |
322,100
+85,200
| +36% | +$1.05M |
|
1609
PUT
Hyatt Hotels
H
$17.6B
| $3.43M | ﹤0.01% |
32,300
+16,700
| +107% | +$1.9M |
|
1610
BHP
BHP
$213B
| $3.42M | ﹤0.01% |
60,221
-5,747
| -9% | -$336K |
|
1611
CALL
Landstar System
LSTR
$6.8B
| $3.41M | ﹤0.01% |
19,300
+18,700
| +3,117% | +$3.59M |
|
1612
PUT
Williams Companies
WMB
$90.5B
| $3.41M | ﹤0.01% |
101,300
+300
| +0.3% | +$10.2K |
|
|
CYBR
1613
CALL
DELISTED
CyberArk
CYBR
| $3.41M | ﹤0.01% |
20,800
-2,500
| -11% | -$402K |
|
1614
Tyson Foods
TSN
$20.2B
| $3.4M | ﹤0.01% |
+67,355
| New | +$3.59M |
|
1615
PUT
Chemours
CC
$2.59B
| $3.39M | ﹤0.01% |
121,000
+18,800
| +18% | +$645K |
|
1616
CALL
Campbell Soup
CPB
$6.51B
| $3.39M | ﹤0.01% |
82,600
+29,700
| +56% | +$1.3M |
|
1617
PUT
Asana
ASAN
$1.58B
| $3.39M | ﹤0.01% |
185,200
-56,100
| -23% | -$1.17M |
|
1618
CALL
Alaska Air
ALK
$5.15B
| $3.38M | ﹤0.01% |
91,200
+52,900
| +138% | +$2.4M |
|
1619
CALL
Lincoln National
LNC
$7.91B
| $3.38M | ﹤0.01% |
136,800
-40,600
| -23% | -$1.06M |
|
1620
CALL
Edison International
EIX
$30.7B
| $3.37M | ﹤0.01% |
53,300
+21,900
| +70% | +$1.53M |
|
1621
CALL
iQIYI
IQ
$1.18B
| $3.37M | ﹤0.01% |
711,700
+179,300
| +34% | +$934K |
|
1622
PUT
Equifax
EFX
$20.3B
| $3.37M | ﹤0.01% |
18,400
+12,400
| +207% | +$2.53M |
|
1623
PUT
Dave & Buster's
PLAY
$343M
| $3.37M | ﹤0.01% |
90,900
+38,800
| +74% | +$1.58M |
|
1624
CALL
Weatherford International
WFRD
$6.36B
| $3.37M | ﹤0.01% |
37,300
-6,700
| -15% | -$566K |
|
1625
CALL
PVH
PVH
$3.71B
| $3.37M | ﹤0.01% |
44,000
+4,600
| +12% | +$381K |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.