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 | |
|---|---|---|---|---|---|---|
2801
PUT
Guardant Health
GH
$19.2B
| $880K | ﹤0.01% |
29,700
+7,500
| +34% | +$264K |
|
|
ITCI
2802
CALL
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $880K | ﹤0.01% |
16,900
+9,300
| +122% | +$542K |
|
2803
PUT
ARS Pharmaceuticals
SPRY
$569M
| $878K | ﹤0.01% |
232,400
+192,200
| +478% | +$1.26M |
|
2804
CALL
Sociedad Química y Minera de Chile
SQM
$19.4B
| $877K | ﹤0.01% |
14,700
-13,100
| -47% | -$883K |
|
2805
CALL
Avery Dennison
AVY
$12.4B
| $876K | ﹤0.01% |
4,800
+4,400
| +1,100% | +$797K |
|
2806
Targa Resources
TRGP
$58.2B
| $876K | ﹤0.01% |
+10,223
| New | +$847K |
|
2807
CALL
Crinetics Pharmaceuticals
CRNX
$8.87B
| $874K | ﹤0.01% |
29,400
+28,700
| +4,100% | +$591K |
|
2808
CALL
Huron Consulting
HURN
$1.86B
| $874K | ﹤0.01% |
+8,400
| New | +$800K |
|
2809
Asana
ASAN
$1.79B
| $873K | ﹤0.01% |
47,709
-16,379
| -26% | -$342K |
|
2810
ING
ING
$95.1B
| $873K | ﹤0.01% |
66,255
+60,063
| +970% | +$846K |
|
|
JKS
2811
JinkoSolar
JKS
$797M
| $873K | ﹤0.01% |
+28,754
| New | +$1.03M |
|
2812
AerSale
ASLE
$301M
| $870K | ﹤0.01% |
58,261
+25,174
| +76% | +$363K |
|
2813
Jabil
JBL
$31.8B
| $868K | ﹤0.01% |
6,845
+561
| +9% | +$61.4K |
|
|
CNH
2814
CALL
CNH Industrial
CNH
$13.5B
| $868K | ﹤0.01% |
71,800
+43,000
| +149% | +$595K |
|
|
HBI
2815
DELISTED
Hanesbrands
HBI
| $867K | ﹤0.01% |
219,099
-148,362
| -40% | -$719K |
|
2816
AMC Entertainment Holdings
AMC
$2.09B
| $866K | ﹤0.01% |
108,463
+107,073
| +7,703% | +$3.17M |
|
|
SQSP
2817
PUT
DELISTED
Squarespace, Inc.
SQSP
| $866K | ﹤0.01% |
29,900
+12,800
| +75% | +$393K |
|
2818
CALL
Alto Ingredients
ALTO
$349M
| $865K | ﹤0.01% |
195,800
+116,500
| +147% | +$450K |
|
2819
PUT
Ardmore Shipping
ASC
$674M
| $865K | ﹤0.01% |
66,500
+62,200
| +1,447% | +$801K |
|
|
AXNX
2820
CALL
DELISTED
Axonics, Inc. Common Stock
AXNX
| $864K | ﹤0.01% |
+15,400
| New | +$866K |
|
2821
CALL
Apple Hospitality REIT
APLE
$3.97B
| $863K | ﹤0.01% |
56,300
-1,200
| -2% | -$18.4K |
|
2822
PUT
Twist Bioscience
TWST
$5.34B
| $863K | ﹤0.01% |
42,600
+22,700
| +114% | +$499K |
|
|
OBE
2823
Obsidian Energy
OBE
$676M
| $862K | ﹤0.01% |
104,919
+16,134
| +18% | +$113K |
|
2824
CALL
Aviat Networks
AVNW
$263M
| $861K | ﹤0.01% |
27,600
+300
| +1% | +$9.48K |
|
2825
CALL
WEC Energy
WEC
$37.3B
| $861K | ﹤0.01% |
10,700
+9,100
| +569% | +$791K |
|
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.