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 | |
|---|---|---|---|---|---|---|
901
PUT
Tapestry
TPR
$28.1B
| $12.5M | 0.01% |
265,400
+39,200
| +17% | +$1.62M |
|
902
Best Buy
BBY
$17.8B
| $12.5M | 0.01% |
120,549
+6,155
| +5% | +$555K |
|
903
CALL
Franklin Resources
BEN
$16.8B
| $12.5M | 0.01% |
618,000
+62,400
| +11% | +$1.34M |
|
|
CGC
904
CALL
Canopy Growth
CGC
$382M
| $12.4M | 0.01% |
2,582,000
+283,000
| +12% | +$1.71M |
|
905
PUT
Reddit
RDDT
$32.5B
| $12.4M | 0.01% |
188,700
-66,200
| -26% | -$4.09M |
|
906
CALL
BILL Holdings
BILL
$4.11B
| $12.4M | 0.01% |
235,600
+135,500
| +135% | +$6.98M |
|
907
CALL
Constellation Brands
STZ
$22.1B
| $12.4M | 0.01% |
48,100
-4,500
| -9% | -$1.12M |
|
908
PUT
Diamondback Energy
FANG
$57.8B
| $12.3M | 0.01% |
71,500
-47,300
| -40% | -$9.11M |
|
909
Warner Bros
WBD
$65.1B
| $12.3M | 0.01% |
1,494,111
+506,584
| +51% | +$3.96M |
|
910
PUT
Automatic Data Processing
ADP
$97.1B
| $12.3M | 0.01% |
44,500
+3,400
| +8% | +$889K |
|
911
CALL
Royal Gold
RGLD
$16.9B
| $12.3M | 0.01% |
87,700
+19,000
| +28% | +$2.6M |
|
912
CALL
General Mills
GIS
$19B
| $12.3M | 0.01% |
166,400
+10,300
| +7% | +$714K |
|
913
PUT
Riot Platforms
RIOT
$9.02B
| $12.3M | 0.01% |
1,653,600
+515,500
| +45% | +$4.46M |
|
914
CALL
Centene
CNC
$31.5B
| $12.3M | 0.01% |
162,900
+17,400
| +12% | +$1.28M |
|
915
PUT
AngloGold Ashanti
AU
$39.7B
| $12.2M | 0.01% |
459,900
-36,900
| -7% | -$1.06M |
|
916
CALL
Howmet Aerospace
HWM
$115B
| $12.2M | 0.01% |
121,400
+45,500
| +60% | +$4.11M |
|
|
CNR
917
PUT
Core Natural Resources Inc
CNR
$4.36B
| $12.1M | 0.01% |
116,100
-45,000
| -28% | -$4.38M |
|
918
CALL
Toronto Dominion Bank
TD
$197B
| $12.1M | 0.01% |
191,800
-67,900
| -26% | -$4.01M |
|
919
PUT
Veeva Systems
VEEV
$29.2B
| $12.1M | 0.01% |
57,800
+13,500
| +30% | +$2.67M |
|
920
Southwest Airlines
LUV
$21.9B
| $12.1M | 0.01% |
408,416
+23,572
| +6% | +$653K |
|
921
CALL
British American Tobacco
BTI
$129B
| $12.1M | 0.01% |
330,800
+102,500
| +45% | +$3.66M |
|
922
3M
MMM
$87.5B
| $12M | 0.01% |
87,838
-15,187
| -15% | -$1.86M |
|
923
CALL
Royal Bank of Canada
RY
$290B
| $12M | 0.01% |
96,000
+15,200
| +19% | +$1.75M |
|
924
CALL
monday.com
MNDY
$3.03B
| $12M | 0.01% |
43,100
-7,600
| -15% | -$1.88M |
|
925
PUT
EQT Corp
EQT
$33.4B
| $12M | 0.01% |
326,200
+25,800
| +9% | +$878K |
|
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.