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 | |
|---|---|---|---|---|---|---|
1801
CALL
Maplebear
CART
$9.92B
| $2.81M | ﹤0.01% |
+94,600
| New | +$2.87M |
|
1802
PUT
SM Energy
SM
$7.96B
| $2.81M | ﹤0.01% |
70,800
+29,600
| +72% | +$1.12M |
|
1803
PUT
Payoneer
PAYO
$2.41B
| $2.8M | ﹤0.01% |
457,800
-64,300
| -12% | -$362K |
|
1804
Dollar General
DG
$25.9B
| $2.8M | ﹤0.01% |
+26,455
| New | +$3.94M |
|
1805
PUT
Cenovus Energy
CVE
$54.6B
| $2.78M | ﹤0.01% |
133,600
-77,400
| -37% | -$1.48M |
|
1806
CALL
PTC
PTC
$13.7B
| $2.78M | ﹤0.01% |
19,600
+15,500
| +378% | +$2.22M |
|
1807
CALL
Cracker Barrel
CBRL
$1.2B
| $2.77M | ﹤0.01% |
41,300
+16,500
| +67% | +$1.39M |
|
1808
Goodyear
GT
$2.07B
| $2.77M | ﹤0.01% |
222,998
-196,722
| -47% | -$2.67M |
|
1809
PUT
Sweetgreen
SG
$713M
| $2.77M | ﹤0.01% |
235,900
-5,700
| -2% | -$79.4K |
|
1810
CALL
Barclays
BCS
$94.1B
| $2.77M | ﹤0.01% |
355,700
-3,500
| -1% | -$27.2K |
|
|
SEE
1811
PUT
DELISTED
Sealed Air
SEE
| $2.77M | ﹤0.01% |
84,200
+45,400
| +117% | +$1.75M |
|
1812
PUT
Groupon
GRPN
$980M
| $2.77M | ﹤0.01% |
180,500
+43,000
| +31% | +$419K |
|
1813
CALL
Spectrum Brands
SPB
$2.04B
| $2.77M | ﹤0.01% |
35,300
-156,600
| -82% | -$12.4M |
|
1814
PUT
GlobalFoundries
GFS
$29.4B
| $2.76M | ﹤0.01% |
47,500
+13,100
| +38% | +$777K |
|
1815
PUT
Avantor
AVTR
$7.81B
| $2.76M | ﹤0.01% |
131,000
+124,600
| +1,947% | +$2.65M |
|
1816
PUT
Equity Residential
EQR
$25.4B
| $2.76M | ﹤0.01% |
47,000
+21,600
| +85% | +$1.4M |
|
1817
PUT
CAVA Group
CAVA
$7.22B
| $2.76M | ﹤0.01% |
90,000
+71,600
| +389% | +$3.12M |
|
1818
Trane Technologies
TT
$106B
| $2.75M | ﹤0.01% |
13,576
+1,791
| +15% | +$359K |
|
1819
CALL
PPG Industries
PPG
$25.9B
| $2.75M | ﹤0.01% |
21,200
-20,800
| -50% | -$2.92M |
|
|
SKX
1820
DELISTED
Skechers
SKX
| $2.75M | ﹤0.01% |
56,198
+33,935
| +152% | +$1.73M |
|
|
EBIX
1821
CALL
DELISTED
Ebix Inc
EBIX
| $2.75M | ﹤0.01% |
278,100
+34,400
| +14% | +$669K |
|
1822
PUT
Option Care Health
OPCH
$3.4B
| $2.75M | ﹤0.01% |
84,900
-90,900
| -52% | -$3.06M |
|
1823
PUT
JetBlue
JBLU
$1.96B
| $2.74M | ﹤0.01% |
596,200
+490,300
| +463% | +$3.22M |
|
1824
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $2.74M | ﹤0.01% |
67,700
+14,600
| +27% | +$554K |
|
1825
CALL
Semtech
SMTC
$11.7B
| $2.74M | ﹤0.01% |
106,400
+12,300
| +13% | +$323K |
|
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.