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 | |
|---|---|---|---|---|---|---|
1751
PUT
California Resources
CRC
$4.75B
| $2.95M | ﹤0.01% |
52,700
+47,400
| +894% | +$2.52M |
|
1752
Direxion Daily S&P 500 Bear 3x ETF
SPXS
$332M
| $2.95M | ﹤0.01% |
18,677
+13,448
| +257% | +$1.89M |
|
1753
PUT
Dutch Bros
BROS
$8.78B
| $2.94M | ﹤0.01% |
126,600
+27,200
| +27% | +$775K |
|
1754
CALL
Ingersoll Rand
IR
$33B
| $2.94M | ﹤0.01% |
46,100
+10,000
| +28% | +$665K |
|
1755
CALL
Ares Capital
ARCC
$13.5B
| $2.94M | ﹤0.01% |
150,800
-28,600
| -16% | -$555K |
|
1756
CALL
VICI Properties
VICI
$29.4B
| $2.93M | ﹤0.01% |
100,800
-23,800
| -19% | -$738K |
|
1757
CALL
Boyd Gaming
BYD
$6.47B
| $2.93M | ﹤0.01% |
48,200
+11,300
| +31% | +$753K |
|
1758
CALL
Cytokinetics
CYTK
$11B
| $2.93M | ﹤0.01% |
99,500
+88,400
| +796% | +$2.94M |
|
1759
PUT
FLEX LNG
FLNG
$1.67B
| $2.93M | ﹤0.01% |
97,200
+30,500
| +46% | +$942K |
|
|
VTLE
1760
PUT
DELISTED
Vital Energy
VTLE
| $2.93M | ﹤0.01% |
52,900
-4,800
| -8% | -$258K |
|
1761
PUT
Incyte
INCY
$23.5B
| $2.93M | ﹤0.01% |
50,700
-2,100
| -4% | -$132K |
|
1762
PUT
Conagra Brands
CAG
$7.07B
| $2.92M | ﹤0.01% |
106,700
+50,800
| +91% | +$1.57M |
|
1763
PUT
UGI
UGI
$8B
| $2.92M | ﹤0.01% |
127,200
+119,200
| +1,490% | +$2.96M |
|
|
APLS
1764
DELISTED
Apellis Pharmaceuticals
APLS
| $2.92M | ﹤0.01% |
76,865
+854
| +1% | +$37.5K |
|
1765
PUT
Lamar Advertising Co
LAMR
$16.2B
| $2.92M | ﹤0.01% |
35,000
+29,200
| +503% | +$2.68M |
|
1766
PUT
Valley National Bancorp
VLY
$7.93B
| $2.92M | ﹤0.01% |
340,800
+35,700
| +12% | +$324K |
|
1767
CALL
Texas Roadhouse
TXRH
$12.7B
| $2.91M | ﹤0.01% |
30,300
+20,900
| +222% | +$2.23M |
|
1768
PUT
MP Materials
MP
$7.35B
| $2.91M | ﹤0.01% |
152,400
+16,800
| +12% | +$373K |
|
|
1769
CALL
FLEX LNG
FLNG
$1.67B
| $2.91M | ﹤0.01% |
96,400
+51,000
| +112% | +$1.57M |
|
1770
PUT
Skywest
SKYW
$4.11B
| $2.91M | ﹤0.01% |
69,300
+40,400
| +140% | +$1.69M |
|
1771
CALL
Stride
LRN
$3.69B
| $2.9M | ﹤0.01% |
64,500
+39,500
| +158% | +$1.61M |
|
1772
Live Nation Entertainment
LYV
$41.2B
| $2.9M | ﹤0.01% |
+34,957
| New | +$3.05M |
|
1773
CALL
Shake Shack
SHAK
$2.3B
| $2.9M | ﹤0.01% |
49,900
+1,900
| +4% | +$135K |
|
|
FTCH
1774
PUT
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $2.89M | ﹤0.01% |
1,382,600
+257,800
| +23% | +$1.05M |
|
1775
CALL
Syndax Pharmaceuticals
SNDX
$1.84B
| $2.89M | ﹤0.01% |
198,900
+197,300
| +12,331% | +$3.73M |
|
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.