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 | |
|---|---|---|---|---|---|---|
826
PUT
First Citizens BancShares
FCNCA
$25.6B
| $14M | 0.01% |
7,600
-900
| -11% | -$1.72M |
|
827
PUT
Elevance Health
ELV
$82.3B
| $14M | 0.01% |
26,900
-7,500
| -22% | -$4.01M |
|
828
CALL
MPLX
MPLX
$58.4B
| $14M | 0.01% |
314,300
+110,700
| +54% | +$4.73M |
|
829
PUT
AerCap
AER
$23.4B
| $14M | 0.01% |
147,500
+65,100
| +79% | +$6.1M |
|
830
CALL
Floor & Decor
FND
$5.73B
| $13.9M | 0.01% |
112,300
-12,600
| -10% | -$1.31M |
|
831
PUT
Crown Castle
CCI
$32.5B
| $13.9M | 0.01% |
117,500
-14,900
| -11% | -$1.64M |
|
832
CALL
Veeva Systems
VEEV
$29.2B
| $13.9M | 0.01% |
66,400
-4,100
| -6% | -$810K |
|
833
PUT
CME Group
CME
$91.9B
| $13.9M | 0.01% |
62,900
+16,200
| +35% | +$3.35M |
|
834
PUT
AutoZone
AZO
$47.7B
| $13.9M | 0.01% |
4,400
+100
| +2% | +$307K |
|
|
MRSH
835
PUT
Marsh
MRSH
$84.2B
| $13.9M | 0.01% |
62,100
+38,800
| +167% | +$8.61M |
|
|
EXAS
836
CALL
DELISTED
Exact Sciences
EXAS
| $13.8M | 0.01% |
203,200
+100,600
| +98% | +$5.68M |
|
837
CALL
Canadian Natural Resources
CNQ
$98B
| $13.8M | 0.01% |
416,200
+43,000
| +12% | +$1.5M |
|
838
CALL
Domino's
DPZ
$10.7B
| $13.8M | 0.01% |
32,100
-4,400
| -12% | -$1.91M |
|
839
CALL
FTAI Aviation
FTAI
$22.2B
| $13.8M | 0.01% |
103,700
-45,100
| -30% | -$5.11M |
|
840
PUT
Quanta Services
PWR
$98.1B
| $13.8M | 0.01% |
46,200
+18,400
| +66% | +$4.86M |
|
841
PUT
Prologis
PLD
$135B
| $13.7M | 0.01% |
108,600
-21,900
| -17% | -$2.72M |
|
842
CALL
Builders FirstSource
BLDR
$7.59B
| $13.7M | 0.01% |
70,700
-36,500
| -34% | -$6.05M |
|
843
CALL
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$163M
| $13.7M | 0.01% |
276,300
+202,000
| +272% | +$9.88M |
|
844
CALL
Generac Holdings
GNRC
$12.4B
| $13.7M | 0.01% |
86,000
-25,000
| -23% | -$3.71M |
|
|
SCIU
845
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
| $13.6M | 0.01% |
438,000
-64,700
| -13% | -$2.02M |
|
846
CALL
DexCom
DXCM
$27.2B
| $13.6M | 0.01% |
203,100
+36,000
| +22% | +$2.96M |
|
847
CALL
PPG Industries
PPG
$25.4B
| $13.6M | 0.01% |
102,700
+25,400
| +33% | +$3.21M |
|
848
PUT
Cintas
CTAS
$81.3B
| $13.6M | 0.01% |
66,000
+62,000
| +1,550% | +$12M |
|
849
PUT
Cboe Global Markets
CBOE
$29.8B
| $13.5M | 0.01% |
66,100
+43,000
| +186% | +$8.45M |
|
|
WBA
850
DELISTED
Walgreens Boots Alliance
WBA
| $13.5M | 0.01% |
1,510,857
+1,112,874
| +280% | +$11.5M |
|
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.