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 | |
|---|---|---|---|---|---|---|
826
PUT
Toll Brothers
TOL
$13.7B
| $12.4M | 0.01% |
167,400
-95,000
| -36% | -$7.5M |
|
827
PUT
Peabody Energy
BTU
$2.9B
| $12.4M | 0.01% |
476,300
+170,000
| +56% | +$3.8M |
|
828
PUT
Kohl's
KSS
$2.06B
| $12.4M | 0.01% |
590,000
+250,500
| +74% | +$6.32M |
|
829
CALL
McKesson
MCK
$96.5B
| $12.3M | 0.01% |
28,400
+11,700
| +70% | +$4.93M |
|
830
CALL
Bunge Global
BG
$23.7B
| $12.3M | 0.01% |
114,000
+46,900
| +70% | +$5.14M |
|
|
TYNS
831
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $12.3M | 0.01% |
193,700
+58,400
| +43% | +$3.72M |
|
832
PUT
Ross Stores
ROST
$74.5B
| $12.3M | 0.01% |
108,800
+8,600
| +9% | +$986K |
|
833
CALL
Invesco S&P SmallCap Low Volatility ETF
XSLV
$246M
| $12.3M | 0.01% |
173,700
+89,300
| +106% | +$3.67M |
|
834
CALL
Riot Platforms
RIOT
$9.02B
| $12.3M | 0.01% |
1,314,800
-52,200
| -4% | -$719K |
|
835
PUT
Scorpio Tankers
STNG
$3.95B
| $12.3M | 0.01% |
226,600
+136,200
| +151% | +$6.65M |
|
836
CALL
Carrier Global
CARR
$57.4B
| $12.2M | 0.01% |
221,300
+136,100
| +160% | +$7.49M |
|
837
CALL
W.P. Carey
WPC
$16.7B
| $12.1M | 0.01% |
228,704
+4,288
| +2% | +$275K |
|
838
CALL
Hasbro
HAS
$12.4B
| $12.1M | 0.01% |
183,000
+105,800
| +137% | +$7M |
|
839
PUT
Tractor Supply
TSCO
$15.9B
| $12.1M | 0.01% |
297,500
-89,500
| -23% | -$3.88M |
|
840
CALL
ProShares Ultra S&P500
SSO
$7.82B
| $12.1M | 0.01% |
440,800
+270,600
| +159% | +$7.86M |
|
841
CALL
Bank of Montreal
BMO
$124B
| $12M | 0.01% |
142,800
+41,800
| +41% | +$3.67M |
|
842
PUT
Bath & Body Works
BBWI
$3.9B
| $12M | 0.01% |
354,500
+53,800
| +18% | +$1.95M |
|
843
PUT
Elevance Health
ELV
$82.3B
| $12M | 0.01% |
27,500
+5,700
| +26% | +$2.59M |
|
844
PUT
FMC
FMC
$1.46B
| $12M | 0.01% |
178,800
+169,700
| +1,865% | +$14.7M |
|
|
FSR
845
CALL
DELISTED
Fisker Inc.
FSR
| $11.9M | 0.01% |
1,857,100
+627,900
| +51% | +$3.82M |
|
846
PUT
Mondelez International
MDLZ
$77.1B
| $11.8M | 0.01% |
170,300
-20,000
| -11% | -$1.44M |
|
|
AXON
847
CALL
Axon Enterprise
AXON
$39.6B
| $11.8M | 0.01% |
59,300
+7,800
| +15% | +$1.53M |
|
848
PUT
Zimmer Biomet
ZBH
$17.3B
| $11.8M | 0.01% |
105,100
+76,500
| +267% | +$9.71M |
|
849
CALL
Aflac
AFL
$63.3B
| $11.7M | 0.01% |
152,900
-22,700
| -13% | -$1.69M |
|
850
PUT
HSBC
HSBC
$349B
| $11.7M | 0.01% |
295,600
+42,000
| +17% | +$1.66M |
|
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.