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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2551
CALL
Clean Harbors
CLH
$16.1B
| $1.6M | ﹤0.01% |
9,200
-5,900
| -39% | -$968K |
|
2552
PUT
Establishment Labs
ESTA
$2.72B
| $1.6M | ﹤0.01% |
62,000
+59,000
| +1,967% | +$1.73M |
|
2553
PUT
Warby Parker
WRBY
$3.01B
| $1.6M | ﹤0.01% |
113,900
+35,800
| +46% | +$446K |
|
2554
CALL
Appian
APPN
$1.74B
| $1.6M | ﹤0.01% |
42,600
+37,700
| +769% | +$1.47M |
|
2555
Matador Resources
MTDR
$6.31B
| $1.6M | ﹤0.01% |
28,192
+23,484
| +499% | +$1.37M |
|
2556
PUT
Vail Resorts
MTN
$5.19B
| $1.6M | ﹤0.01% |
7,500
+3,200
| +74% | +$701K |
|
2557
CALL
Blink Charging
BLNK
$75.2M
| $1.6M | ﹤0.01% |
471,300
+193,900
| +70% | +$605K |
|
2558
Impinj
PI
$3.89B
| $1.6M | ﹤0.01% |
17,748
+7,096
| +67% | +$509K |
|
2559
PUT
Galicia Financial Group
GGAL
$7.92B
| $1.59M | ﹤0.01% |
92,400
-55,300
| -37% | -$784K |
|
2560
Pebblebrook Hotel Trust
PEB
$2.16B
| $1.59M | ﹤0.01% |
+99,806
| New | +$1.33M |
|
2561
PUT
Banco Bradesco
BBD
$38.1B
| $1.59M | ﹤0.01% |
488,450
-5,100
| -1% | -$16K |
|
2562
PUT
Douglas Emmett
DEI
$2.06B
| $1.59M | ﹤0.01% |
109,600
+50,800
| +86% | +$645K |
|
2563
PUT
Booz Allen Hamilton
BAH
$8.7B
| $1.59M | ﹤0.01% |
12,400
+10,500
| +553% | +$1.31M |
|
2564
PUT
VinFast Auto
VFS
$6.67B
| $1.59M | ﹤0.01% |
189,500
-557,000
| -75% | -$3.82M |
|
2565
CALL
National Grid
NGG
$82.7B
| $1.58M | ﹤0.01% |
24,726
+17,404
| +238% | +$1.04M |
|
2566
CALL
Pathward Financial
CASH
$1.81B
| $1.58M | ﹤0.01% |
+29,900
| New | +$1.47M |
|
|
DSKE
2567
CALL
DELISTED
Daseke, Inc. Common Stock
DSKE
| $1.58M | ﹤0.01% |
194,900
+175,300
| +894% | +$849K |
|
|
RVNC
2568
CALL
DELISTED
Revance Therapeutics, Inc.
RVNC
| $1.58M | ﹤0.01% |
179,400
+137,900
| +332% | +$1.13M |
|
2569
CALL
Bio-Techne
TECH
$11.2B
| $1.57M | ﹤0.01% |
20,400
+5,000
| +32% | +$329K |
|
2570
Cardinal Health
CAH
$53.4B
| $1.57M | ﹤0.01% |
15,614
-21,615
| -58% | -$2.14M |
|
|
SNV
2571
DELISTED
Synovus
SNV
| $1.57M | ﹤0.01% |
41,760
+20,776
| +99% | +$635K |
|
|
TIGR
2572
CALL
UP Fintech Holding
TIGR
$845M
| $1.57M | ﹤0.01% |
355,800
-162,300
| -31% | -$749K |
|
2573
CALL
International Seaways
INSW
$4.57B
| $1.57M | ﹤0.01% |
34,500
-8,600
| -20% | -$396K |
|
|
DHC
2574
PUT
Diversified Healthcare Trust
DHC
$2.26B
| $1.57M | ﹤0.01% |
419,100
+415,100
| +10,378% | +$976K |
|
2575
CALL
Danaos Corp
DAC
$2.55B
| $1.56M | ﹤0.01% |
21,100
-10,600
| -33% | -$720K |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.