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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
851
PUT
Monster Beverage
MNST
$91.5B
| $13.5M | 0.01% |
256,800
+88,500
| +53% | +$4.69M |
|
852
CALL
Yum! Brands
YUM
$40.5B
| $13.5M | 0.01% |
100,600
-54,400
| -35% | -$7.36M |
|
853
Constellation Energy
CEG
$98.8B
| $13.4M | 0.01% |
59,998
-13,455
| -18% | -$3.36M |
|
854
PUT
Lemonade
LMND
$4.67B
| $13.4M | 0.01% |
365,100
+218,700
| +149% | +$6.98M |
|
855
PUT
Wingstop
WING
$3.68B
| $13.4M | 0.01% |
47,100
-42,700
| -48% | -$14.5M |
|
856
CALL
BILL Holdings
BILL
$4.11B
| $13.4M | 0.01% |
157,900
-77,700
| -33% | -$5.79M |
|
857
Fidelity Wise Origin Bitcoin Fund
FBTC
$12B
| $13.4M | 0.01% |
+163,744
| New | +$11.9M |
|
858
CALL
American Electric Power
AEP
$73.2B
| $13.3M | 0.01% |
144,700
-6,000
| -4% | -$581K |
|
859
PUT
Kraft Heinz
KHC
$29.9B
| $13.3M | 0.01% |
434,300
+176,900
| +69% | +$5.8M |
|
860
PUT
EQT Corp
EQT
$33.3B
| $13.3M | 0.01% |
289,100
-37,100
| -11% | -$1.53M |
|
|
CFLT
861
CALL
DELISTED
Confluent
CFLT
| $13.3M | 0.01% |
476,700
+152,300
| +47% | +$4.08M |
|
862
CALL
UiPath
PATH
$5.28B
| $13.3M | 0.01% |
1,047,800
-204,300
| -16% | -$2.7M |
|
863
PUT
Ciena
CIEN
$57.2B
| $13.3M | 0.01% |
157,000
+79,100
| +102% | +$5.68M |
|
864
CALL
Nice
NICE
$5.09B
| $13.3M | 0.01% |
78,400
-15,800
| -17% | -$2.82M |
|
865
PUT
PENN Entertainment
PENN
$2.74B
| $13.3M | 0.01% |
670,900
-235,300
| -26% | -$4.62M |
|
866
CALL
AGNC Investment
AGNC
$12.2B
| $13.3M | 0.01% |
1,443,400
-615,200
| -30% | -$6M |
|
867
State Street SPDR S&P 500 ETF Trust
SPY
$775B
| $13.3M | 0.01% |
+22,614
| New | +$13.3M |
|
868
PUT
Biogen
BIIB
$29.7B
| $13.2M | 0.01% |
86,300
-28,700
| -25% | -$4.84M |
|
869
CALL
British American Tobacco
BTI
$129B
| $13.2M | 0.01% |
362,800
+32,000
| +10% | +$1.16M |
|
870
PUT
Live Nation Entertainment
LYV
$41.1B
| $13.1M | 0.01% |
101,500
-294,600
| -74% | -$37.1M |
|
871
CALL
Veeva Systems
VEEV
$29.2B
| $13.1M | 0.01% |
62,500
-3,900
| -6% | -$858K |
|
872
Twilio
TWLO
$27.9B
| $13.1M | 0.01% |
121,548
-78,530
| -39% | -$7.18M |
|
873
CALL
Travelers Companies
TRV
$78.3B
| $13.1M | 0.01% |
54,500
+14,600
| +37% | +$3.65M |
|
874
CALL
Alaska Air
ALK
$4.96B
| $13.1M | 0.01% |
202,300
+76,200
| +60% | +$4.01M |
|
875
PUT
Clorox
CLX
$11.3B
| $13.1M | 0.01% |
80,600
-8,600
| -10% | -$1.41M |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.