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 | |
|---|---|---|---|---|---|---|
|
SAGE
1851
CALL
DELISTED
Sage Therapeutics
SAGE
| $2.63M | ﹤0.01% |
127,900
+120,600
| +1,652% | +$3.48M |
|
1852
PUT
Ormat Technologies
ORA
$6.11B
| $2.63M | ﹤0.01% |
37,600
+36,400
| +3,033% | +$2.82M |
|
|
WIRE
1853
CALL
DELISTED
Encore Wire Corp
WIRE
| $2.63M | ﹤0.01% |
14,400
+10,600
| +279% | +$1.8M |
|
|
GRMN
1854
PUT
Garmin
GRMN
$46.9B
| $2.62M | ﹤0.01% |
24,900
+8,000
| +47% | +$841K |
|
1855
CALL
Procore
PCOR
$6.46B
| $2.62M | ﹤0.01% |
40,100
+28,200
| +237% | +$1.88M |
|
|
FSR
1856
PUT
DELISTED
Fisker Inc.
FSR
| $2.62M | ﹤0.01% |
407,600
-415,400
| -50% | -$2.53M |
|
1857
CALL
Allegro MicroSystems
ALGM
$8.58B
| $2.62M | ﹤0.01% |
81,900
-33,400
| -29% | -$1.36M |
|
1858
CALL
Rapid7
RPD
$634M
| $2.61M | ﹤0.01% |
57,000
-16,000
| -22% | -$739K |
|
1859
XPO
XPO
$25B
| $2.61M | ﹤0.01% |
34,941
-52,240
| -60% | -$3.61M |
|
1860
PUT
Johnson Controls International
JCI
$87.5B
| $2.61M | ﹤0.01% |
49,000
+9,700
| +25% | +$599K |
|
1861
PUT
Watsco Inc
WSO
$14.9B
| $2.61M | ﹤0.01% |
6,900
+6,300
| +1,050% | +$2.28M |
|
1862
PUT
KKR & Co
KKR
$89.2B
| $2.6M | ﹤0.01% |
42,300
-2,300
| -5% | -$140K |
|
1863
CALL
TG Therapeutics
TGTX
$8.58B
| $2.6M | ﹤0.01% |
311,500
-100,300
| -24% | -$1.4M |
|
1864
Freedom Holding
FRHC
$9.61B
| $2.6M | ﹤0.01% |
+30,730
| New | +$2.6M |
|
1865
PUT
TripAdvisor
TRIP
$1.59B
| $2.6M | ﹤0.01% |
157,000
-53,000
| -25% | -$865K |
|
1866
CALL
CDW
CDW
$17.1B
| $2.6M | ﹤0.01% |
12,900
+5,500
| +74% | +$1.1M |
|
|
SVC
1867
CALL
Service Properties Trust
SVC
$1.1B
| $2.59M | ﹤0.01% |
67,460
+4,080
| +6% | +$170K |
|
1868
PUT
Henry Schein
HSIC
$9.74B
| $2.59M | ﹤0.01% |
34,900
+5,700
| +20% | +$439K |
|
1869
PUT
HF Sinclair
DINO
$15.9B
| $2.59M | ﹤0.01% |
45,500
+12,200
| +37% | +$663K |
|
|
NOVA
1870
PUT
DELISTED
Sunnova Energy
NOVA
| $2.59M | ﹤0.01% |
247,000
-35,500
| -13% | -$555K |
|
1871
PUT
WEC Energy
WEC
$37.7B
| $2.58M | ﹤0.01% |
32,100
+28,300
| +745% | +$2.46M |
|
1872
CALL
Hartford Financial Services
HIG
$38.5B
| $2.58M | ﹤0.01% |
36,400
-1,700
| -4% | -$123K |
|
1873
CALL
Bruker
BRKR
$9.2B
| $2.58M | ﹤0.01% |
41,400
+30,800
| +291% | +$2.07M |
|
1874
PUT
Plains All American Pipeline
PAA
$17.4B
| $2.57M | ﹤0.01% |
168,000
+70,600
| +72% | +$1.06M |
|
1875
Whirlpool
WHR
$2.42B
| $2.57M | ﹤0.01% |
+19,204
| New | +$2.71M |
|
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.