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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
876
CALL
Cigna
CI
$75.7B
| $13M | 0.01% |
37,400
-6,900
| -16% | -$2.38M |
|
877
CALL
Invesco S&P SmallCap Low Volatility ETF
XSLV
$246M
| $12.9M | 0.01% |
292,600
+106,400
| +57% | +$4.96M |
|
878
PUT
BHP
BHP
$212B
| $12.9M | 0.01% |
207,200
+37,200
| +22% | +$2.05M |
|
879
CALL
Papa John's
PZZA
$999M
| $12.9M | 0.01% |
238,900
+95,800
| +67% | +$4.41M |
|
880
PUT
CleanSpark
CLSK
$4.01B
| $12.9M | 0.01% |
1,376,200
+565,900
| +70% | +$7.19M |
|
881
PUT
Edison International
EIX
$30.6B
| $12.8M | 0.01% |
147,500
+87,800
| +147% | +$7.13M |
|
882
CALL
Enterprise Products Partners
EPD
$83.9B
| $12.8M | 0.01% |
439,700
+169,800
| +63% | +$4.96M |
|
883
PUT
Synchrony
SYF
$23.3B
| $12.8M | 0.01% |
256,200
+85,700
| +50% | +$4.15M |
|
884
CALL
Suncor Energy
SU
$78.4B
| $12.8M | 0.01% |
345,800
-191,600
| -36% | -$7.4M |
|
885
CALL
Plains All American Pipeline
PAA
$17.4B
| $12.7M | 0.01% |
733,900
+323,800
| +79% | +$5.8M |
|
886
CALL
Johnson Controls International
JCI
$87.4B
| $12.7M | 0.01% |
164,200
-37,700
| -19% | -$2.65M |
|
887
CALL
Flutter Entertainment
FLUT
$17.5B
| $12.7M | 0.01% |
53,700
+27,300
| +103% | +$5.67M |
|
888
PUT
Prudential Financial
PRU
$40.9B
| $12.7M | 0.01% |
105,100
-65,700
| -38% | -$7.77M |
|
889
Bilibili
BILI
$7.32B
| $12.7M | 0.01% |
544,237
+235,147
| +76% | +$3.65M |
|
890
PUT
General Dynamics
GD
$103B
| $12.7M | 0.01% |
42,100
-11,000
| -21% | -$3.23M |
|
891
Snowflake
SNOW
$91.9B
| $12.7M | 0.01% |
110,529
-131,860
| -54% | -$16.2M |
|
892
CALL
Carrier Global
CARR
$57.4B
| $12.7M | 0.01% |
157,700
-140,300
| -47% | -$9.77M |
|
893
PUT
Schwab US Broad Market ETF
SCHB
$42.7B
| $12.7M | 0.01% |
567,900
+316,200
| +126% | +$6.75M |
|
894
PUT
Scorpio Tankers
STNG
$3.95B
| $12.7M | 0.01% |
177,700
+38,400
| +28% | +$2.8M |
|
895
CALL
McCormick & Company Non-Voting
MKC
$13.5B
| $12.6M | 0.01% |
153,200
+85,900
| +128% | +$6.7M |
|
896
CALL
Fidelity National Information Services
FIS
$20.7B
| $12.6M | 0.01% |
150,400
+6,900
| +5% | +$545K |
|
897
PUT
The Mosaic Company
MOS
$7.08B
| $12.6M | 0.01% |
469,900
-103,100
| -18% | -$2.84M |
|
898
PUT
Teva Pharmaceuticals
TEVA
$36.3B
| $12.6M | 0.01% |
698,100
+216,200
| +45% | +$3.78M |
|
899
PUT
Emerson Electric
EMR
$81.2B
| $12.5M | 0.01% |
114,400
+28,200
| +33% | +$3.03M |
|
900
CALL
Exelon
EXC
$48.4B
| $12.5M | 0.01% |
307,500
+5,700
| +2% | +$214K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.