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 | |
|---|---|---|---|---|---|---|
5026
CALL
Gates Industrial Corporation Ltd.
GTES
$6.53B
| $106K | ﹤0.01% |
9,200
+8,100
| +736% | +$101K |
|
5027
CALL
Huazhu Hotels Group
HTHT
$13B
| $106K | ﹤0.01% |
2,700
+1,600
| +145% | +$67.5K |
|
5028
PUT
Landstar System
LSTR
$5.75B
| $106K | ﹤0.01% |
600
| – | – |
|
5029
PUT
Oscar Health
OSCR
$9.42B
| $106K | ﹤0.01% |
19,100
-6,000
| -24% | -$42K |
|
5030
CALL
Utz Brands
UTZ
$1.25B
| $106K | ﹤0.01% |
7,900
-500
| -6% | -$7.71K |
|
|
MMAT
5031
CALL
DELISTED
Meta Materials Inc. Common Stock
MMAT
| $106K | ﹤0.01% |
5,005
-2,283
| -31% | -$50K |
|
5032
CALL
Avient
AVNT
$3.36B
| $105K | ﹤0.01% |
+3,000
| New | +$116K |
|
5033
PUT
Krispy Kreme
DNUT
$553M
| $105K | ﹤0.01% |
8,500
-2,500
| -23% | -$34.9K |
|
5034
PUT
EyePoint Inc
EYPT
$1.08B
| $105K | ﹤0.01% |
13,200
+9,000
| +214% | +$98.7K |
|
5035
PUT
Innoviz Technologies
INVZ
$93.2M
| $105K | ﹤0.01% |
54,300
-330,500
| -86% | -$888K |
|
5036
PUT
Liberty Energy
LBRT
$2.93B
| $105K | ﹤0.01% |
5,700
+4,700
| +470% | +$77.5K |
|
5037
CALL
Protagonist Therapeutics
PTGX
$8.92B
| $105K | ﹤0.01% |
6,300
-1,300
| -17% | -$25.2K |
|
5038
PUT
Alpha Architect US Quantitative Value ETF
QVAL
$587M
| $105K | ﹤0.01% |
5,700
+4,500
| +375% | +$164K |
|
5039
CALL
Worthington Enterprises
WOR
$2.74B
| $105K | ﹤0.01% |
2,757
-6,975
| -72% | -$307K |
|
5040
AMN Healthcare
AMN
$1.35B
| $104K | ﹤0.01% |
+1,231
| New | +$117K |
|
5041
PUT
Bit Digital
BTBT
$502M
| $104K | ﹤0.01% |
49,000
-17,200
| -26% | -$54K |
|
|
KALV
5042
CALL
DELISTED
KalVista Pharmaceuticals
KALV
| $104K | ﹤0.01% |
+10,800
| New | +$110K |
|
5043
PUT
Lightwave Logic
LWLG
$931M
| $104K | ﹤0.01% |
23,400
-2,000
| -8% | -$12.8K |
|
5044
2x Long VIX Futures ETF
UVIX
$262M
| $104K | ﹤0.01% |
15
| – | – |
|
5045
CALL
Veru
VERU
$35.6M
| $104K | ﹤0.01% |
14,510
-6,710
| -32% | -$73.1K |
|
|
CD
5046
DELISTED
Chindata Group Holdings Limited American Depositary Shares
CD
| $104K | ﹤0.01% |
12,549
-56,860
| -82% | -$462K |
|
|
EBIX
5047
DELISTED
Ebix Inc
EBIX
| $104K | ﹤0.01% |
+10,602
| New | +$206K |
|
5048
Archrock
AROC
$6.21B
| $103K | ﹤0.01% |
+8,244
| New | +$98.8K |
|
5049
CALL
Autohome
ATHM
$2.63B
| $103K | ﹤0.01% |
3,400
+2,900
| +580% | +$87.2K |
|
5050
CALL
CorMedix
CRMD
$588M
| $103K | ﹤0.01% |
27,900
+3,200
| +13% | +$12.7K |
|
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.