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 | |
|---|---|---|---|---|---|---|
701
CALL
Teladoc Health
TDOC
$1.57B
| $15.7M | 0.01% |
842,500
+371,000
| +79% | +$8.66M |
|
702
CALL
Synopsys
SNPS
$71.4B
| $15.7M | 0.01% |
34,100
-42,500
| -55% | -$19M |
|
703
PUT
O'Reilly Automotive
ORLY
$71.2B
| $15.6M | 0.01% |
258,000
+121,500
| +89% | +$7.62M |
|
704
PUT
Edwards Lifesciences
EW
$48.1B
| $15.6M | 0.01% |
225,400
+160,100
| +245% | +$12.9M |
|
|
B
705
Barrick Mining
B
$62B
| $15.5M | 0.01% |
1,066,642
+93,205
| +10% | +$1.53M |
|
706
PUT
Futu Holdings
FUTU
$13.8B
| $15.5M | 0.01% |
267,700
-1,000
| -0.4% | -$53.3K |
|
707
PUT
Williams-Sonoma
WSM
$25.6B
| $15.4M | 0.01% |
198,800
+55,800
| +39% | +$3.84M |
|
|
FISV
708
CALL
Fiserv Inc
FISV
$26.7B
| $15.4M | 0.01% |
136,600
-15,700
| -10% | -$1.93M |
|
|
SGEN
709
CALL
DELISTED
Seagen Inc. Common Stock
SGEN
| $15.3M | 0.01% |
72,200
+21,300
| +42% | +$4.25M |
|
710
CALL
Hewlett Packard
HPE
$63B
| $15.3M | 0.01% |
879,900
+193,400
| +28% | +$3.33M |
|
711
PUT
Tyson Foods
TSN
$19.9B
| $15.3M | 0.01% |
302,600
-74,900
| -20% | -$3.99M |
|
712
CALL
Cigna
CI
$75.7B
| $15.3M | 0.01% |
53,400
+10,200
| +24% | +$2.91M |
|
713
CALL
Lucid Motors
LCID
$2.55B
| $15.3M | 0.01% |
273,100
+69,760
| +34% | +$4.52M |
|
714
Home Depot
HD
$324B
| $15.2M | 0.01% |
+50,242
| New | +$16.2M |
|
715
iShares China Large-Cap ETF
FXI
$4.29B
| $15.2M | 0.01% |
571,797
-369,288
| -39% | -$10.2M |
|
|
UCD
716
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $15.1M | 0.01% |
242,700
+97,500
| +67% | +$6.07M |
|
717
CALL
MSCI
MSCI
$40.2B
| $15.1M | 0.01% |
29,400
+2,300
| +8% | +$1.21M |
|
718
CALL
Allstate
ALL
$65.4B
| $15.1M | 0.01% |
135,100
+58,100
| +75% | +$6.34M |
|
|
P
719
PUT
Everpure Inc
P
$24.8B
| $15M | 0.01% |
422,300
-70,800
| -14% | -$2.63M |
|
720
CALL
Archer Daniels Midland
ADM
$41.6B
| $15M | 0.01% |
198,700
+23,100
| +13% | +$1.87M |
|
|
VMW
721
PUT
DELISTED
VMware, Inc
VMW
| $15M | 0.01% |
90,000
+28,700
| +47% | +$4.6M |
|
722
PUT
Hasbro
HAS
$12.3B
| $15M | 0.01% |
226,100
-59,100
| -21% | -$3.91M |
|
723
PUT
GameStop
GME
$9.53B
| $14.9M | 0.01% |
905,000
+46,100
| +5% | +$918K |
|
724
CALL
Lithia Motors
LAD
$7.6B
| $14.8M | 0.01% |
50,200
+43,700
| +672% | +$13.3M |
|
725
PUT
Energy Transfer Partners
ET
$70.3B
| $14.8M | 0.01% |
1,056,100
+585,400
| +124% | +$7.77M |
|
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.