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 | |
|---|---|---|---|---|---|---|
1676
PUT
Vornado Realty Trust
VNO
$7.47B
| $4.39M | ﹤0.01% |
155,300
+28,500
| +22% | +$677K |
|
1677
CALL
Yeti Holdings
YETI
$3.82B
| $4.38M | ﹤0.01% |
84,500
+39,100
| +86% | +$1.73M |
|
1678
PUT
US Foods
USFD
$21.4B
| $4.36M | ﹤0.01% |
96,100
+89,800
| +1,425% | +$3.71M |
|
1679
PUT
Royal Bank of Canada
RY
$291B
| $4.36M | ﹤0.01% |
43,100
-19,400
| -31% | -$1.71M |
|
1680
ASML
ASML
$675B
| $4.36M | ﹤0.01% |
5,756
-30,621
| -84% | -$20.2M |
|
1681
PUT
CSX Corp
CSX
$98.6B
| $4.35M | ﹤0.01% |
125,400
+67,600
| +117% | +$2.15M |
|
1682
CALL
Warner Music
WMG
$13.8B
| $4.34M | ﹤0.01% |
121,300
-51,000
| -30% | -$1.68M |
|
|
MRSH
1683
PUT
Marsh
MRSH
$86.3B
| $4.34M | ﹤0.01% |
22,900
-6,400
| -22% | -$1.24M |
|
1684
CALL
Stride
LRN
$3.69B
| $4.33M | ﹤0.01% |
73,000
+8,500
| +13% | +$465K |
|
1685
CALL
Viper Energy
VNOM
$8.81B
| $4.33M | ﹤0.01% |
138,100
+120,200
| +672% | +$3.57M |
|
1686
PUT
American Water Works
AWK
$26.3B
| $4.33M | ﹤0.01% |
32,800
+12,500
| +62% | +$1.58M |
|
1687
Elevance Health
ELV
$81.9B
| $4.33M | ﹤0.01% |
+9,178
| New | +$4.24M |
|
1688
AerCap
AER
$23.9B
| $4.32M | ﹤0.01% |
+58,188
| New | +$3.84M |
|
1689
CALL
BJs Wholesale Club
BJ
$11.9B
| $4.31M | ﹤0.01% |
64,600
+10,600
| +20% | +$717K |
|
1690
CALL
Fair Isaac
FICO
$28.7B
| $4.31M | ﹤0.01% |
3,700
-2,600
| -41% | -$2.62M |
|
1691
CALL
Krystal Biotech
KRYS
$9.88B
| $4.3M | ﹤0.01% |
34,700
+33,600
| +3,055% | +$3.73M |
|
1692
CALL
BRC Group Holdings
RILY
$277M
| $4.3M | ﹤0.01% |
204,700
+194,800
| +1,968% | +$5.7M |
|
1693
CALL
F5
FFIV
$22.1B
| $4.29M | ﹤0.01% |
24,000
+3,900
| +19% | +$636K |
|
1694
AdvisorShares Pure US Cannabis ETF
MSOS
$864M
| $4.29M | ﹤0.01% |
612,614
+167,559
| +38% | +$1.11M |
|
1695
CALL
VICI Properties
VICI
$29.4B
| $4.29M | ﹤0.01% |
134,700
+33,900
| +34% | +$995K |
|
|
CYBR
1696
CALL
DELISTED
CyberArk
CYBR
| $4.29M | ﹤0.01% |
19,600
-1,200
| -6% | -$223K |
|
1697
CALL
Cinemark Holdings
CNK
$3.82B
| $4.29M | ﹤0.01% |
304,300
+59,200
| +24% | +$921K |
|
1698
PUT
Globant
GLOB
$1.35B
| $4.28M | ﹤0.01% |
18,000
+13,500
| +300% | +$2.76M |
|
1699
PUT
New Oriental
EDU
$7.84B
| $4.28M | ﹤0.01% |
120,700
+3,100
| +3% | +$215K |
|
1700
CALL
Green Plains
GPRE
$1.19B
| $4.28M | ﹤0.01% |
169,800
+62,500
| +58% | +$1.65M |
|
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.