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 | |
|---|---|---|---|---|---|---|
701
PUT
Five Below
FIVE
$11.3B
| $17.6M | 0.01% |
168,000
-86,600
| -34% | -$8.29M |
|
702
PUT
NIO
NIO
$11.7B
| $17.6M | 0.01% |
4,036,400
-102,600
| -2% | -$522K |
|
703
PUT
BP
BP
$112B
| $17.6M | 0.01% |
595,100
+16,300
| +3% | +$490K |
|
704
CALL
PPG Industries
PPG
$26.2B
| $17.5M | 0.01% |
146,800
+44,100
| +43% | +$5.52M |
|
705
CALL
Scorpio Tankers
STNG
$3.9B
| $17.5M | 0.01% |
352,200
-373,700
| -51% | -$21.3M |
|
706
PUT
Regeneron Pharmaceuticals
REGN
$68.3B
| $17.5M | 0.01% |
24,500
-6,400
| -21% | -$5.37M |
|
707
PUT
XPeng
XPEV
$12.3B
| $17.4M | 0.01% |
1,472,300
+385,700
| +35% | +$4.77M |
|
708
PUT
Riot Platforms
RIOT
$8.84B
| $17.3M | 0.01% |
1,693,900
+40,300
| +2% | +$439K |
|
709
Alphabet (Google) Class C
GOOG
$4.17T
| $17.2M | 0.01% |
90,178
-9,286
| -9% | -$1.64M |
|
710
PUT
BioNTech
BNTX
$23.2B
| $17.2M | 0.01% |
150,700
+7,800
| +5% | +$890K |
|
711
PUT
Lumen
LUMN
$6.9B
| $17.2M | 0.01% |
3,231,400
-162,800
| -5% | -$1.12M |
|
712
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $17.1M | 0.01% |
358,400
-96,700
| -21% | -$2.15M |
|
713
PUT
Ferrari
RACE
$65.4B
| $17.1M | 0.01% |
40,300
+9,300
| +30% | +$4.2M |
|
714
CALL
Yum China
YUMC
$14.9B
| $17.1M | 0.01% |
355,200
+117,400
| +49% | +$5.57M |
|
715
Johnson & Johnson
JNJ
$615B
| $17.1M | 0.01% |
118,269
+86,802
| +276% | +$13.5M |
|
716
PUT
Rio Tinto
RIO
$150B
| $17.1M | 0.01% |
290,500
+56,200
| +24% | +$3.59M |
|
|
WBA
717
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $17.1M | 0.01% |
1,829,300
+218,100
| +14% | +$2.03M |
|
718
ProShares Short QQQ
PSQ
$673M
| $17M | 0.01% |
455,468
+121,932
| +37% | +$4.67M |
|
719
PUT
Unity
U
$12.8B
| $17M | 0.01% |
754,800
-516,500
| -41% | -$11.5M |
|
720
CALL
Oneok
OKE
$57.8B
| $17M | 0.01% |
168,900
-3,700
| -2% | -$378K |
|
721
PUT
British American Tobacco
BTI
$134B
| $16.9M | 0.01% |
466,700
-11,600
| -2% | -$419K |
|
722
CALL
Canadian Natural Resources
CNQ
$95.5B
| $16.9M | 0.01% |
547,500
+131,300
| +32% | +$4.42M |
|
723
PUT
Abbott
ABT
$175B
| $16.9M | 0.01% |
149,400
-201,800
| -57% | -$23.3M |
|
724
CALL
Lamb Weston
LW
$6.63B
| $16.9M | 0.01% |
252,800
-55,500
| -18% | -$4.14M |
|
725
CALL
Tapestry
TPR
$29B
| $16.8M | 0.01% |
256,400
-151,600
| -37% | -$8.27M |
|
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.