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 | |
|---|---|---|---|---|---|---|
2626
PUT
Ionis Pharmaceuticals
IONS
$9.35B
| $1.03M | ﹤0.01% |
22,700
-5,500
| -20% | -$227K |
|
2627
PUT
Children's Place
PLCE
$53.6M
| $1.03M | ﹤0.01% |
38,100
+12,800
| +51% | +$347K |
|
2628
PUT
CDW
CDW
$17.1B
| $1.03M | ﹤0.01% |
5,100
+3,800
| +292% | +$758K |
|
2629
CALL
Greif
GEF
$4.47B
| $1.03M | ﹤0.01% |
15,400
+2,100
| +16% | +$149K |
|
2630
CALL
Equity Residential
EQR
$25.4B
| $1.03M | ﹤0.01% |
17,500
-3,300
| -16% | -$213K |
|
|
PPSI
2631
PUT
Pioneer Power Solutions
PPSI
$33.1M
| $1.03M | ﹤0.01% |
164,100
+134,500
| +454% | +$943K |
|
2632
PUT
Warby Parker
WRBY
$3.01B
| $1.03M | ﹤0.01% |
78,100
+51,800
| +197% | +$673K |
|
2633
CALL
Teucrium Agricultural Fund
TAGS
$19.6M
| $1.02M | ﹤0.01% |
101,700
+59,700
| +142% | +$1.86M |
|
|
ICPT
2634
CALL
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $1.02M | ﹤0.01% |
55,300
-2,000
| -3% | -$22.6K |
|
2635
PUT
Extreme Networks
EXTR
$3.86B
| $1.02M | ﹤0.01% |
42,300
+38,500
| +1,013% | +$1.04M |
|
2636
PUT
National Grid
NGG
$82.7B
| $1.02M | ﹤0.01% |
17,934
-637
| -3% | -$38.5K |
|
2637
CALL
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $1.02M | ﹤0.01% |
24,700
+1,500
| +6% | +$42.2K |
|
|
SOND
2638
PUT
DELISTED
Sonder
SOND
| $1.02M | ﹤0.01% |
124,400
+118,430
| +1,984% | +$1.15M |
|
2639
PUT
Comstock Resources
CRK
$3.97B
| $1.02M | ﹤0.01% |
92,500
+33,100
| +56% | +$390K |
|
2640
PUT
Dover
DOV
$27.2B
| $1.02M | ﹤0.01% |
7,300
-100
| -1% | -$14.4K |
|
2641
PUT
CRH
CRH
$66.7B
| $1.02M | ﹤0.01% |
18,600
+15,400
| +481% | +$875K |
|
2642
PUT
Fluor
FLR
$7.29B
| $1.02M | ﹤0.01% |
27,700
+16,500
| +147% | +$553K |
|
|
2643
CALL
Children's Place
PLCE
$53.6M
| $1.02M | ﹤0.01% |
37,600
-24,300
| -39% | -$659K |
|
2644
CALL
Check Point Software Technologies
CHKP
$13.3B
| $1.01M | ﹤0.01% |
7,600
-29,600
| -80% | -$3.89M |
|
2645
PUT
Invesco Mortgage Capital
IVR
$776M
| $1.01M | ﹤0.01% |
101,100
-38,200
| -27% | -$422K |
|
2646
Essential Utilities
WTRG
$11.2B
| $1.01M | ﹤0.01% |
+29,494
| New | +$1.14M |
|
2647
PUT
Calumet Specialty Products
CLMT
$3.63B
| $1.01M | ﹤0.01% |
52,900
+24,900
| +89% | +$431K |
|
2648
PUT
Tencent Music
TME
$14.5B
| $1.01M | ﹤0.01% |
158,400
-37,800
| -19% | -$252K |
|
|
COOP
2649
CALL
DELISTED
Mr. Cooper
COOP
| $1.01M | ﹤0.01% |
18,800
-50,300
| -73% | -$2.76M |
|
2650
PUT
Progyny
PGNY
$2.44B
| $1.01M | ﹤0.01% |
29,600
+16,700
| +129% | +$630K |
|
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.