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 | |
|---|---|---|---|---|---|---|
1651
CALL
Gaming and Leisure Properties
GLPI
$12.8B
| $4.52M | ﹤0.01% |
91,600
+22,000
| +32% | +$1.02M |
|
1652
CALL
AeroVironment
AVAV
$7.57B
| $4.5M | ﹤0.01% |
35,700
+15,500
| +77% | +$1.9M |
|
1653
CALL
Omega Healthcare
OHI
$15.4B
| $4.49M | ﹤0.01% |
146,500
+32,800
| +29% | +$1.05M |
|
|
VSXY
1654
CALL
Victoria's Secret
VSXY
$6.64B
| $4.48M | ﹤0.01% |
168,800
+104,900
| +164% | +$2.23M |
|
1655
CALL
QuantumScape Corp
QS
$3B
| $4.48M | ﹤0.01% |
644,100
+178,000
| +38% | +$1.12M |
|
1656
APA Corp
APA
$12.8B
| $4.47M | ﹤0.01% |
124,644
+45,365
| +57% | +$1.71M |
|
1657
CALL
ResMed
RMD
$28.3B
| $4.47M | ﹤0.01% |
26,000
-34,300
| -57% | -$5.27M |
|
1658
CALL
Haemonetics
HAE
$3.58B
| $4.46M | ﹤0.01% |
52,200
+50,800
| +3,629% | +$4.39M |
|
1659
PUT
Capri Holdings
CPRI
$1.77B
| $4.46M | ﹤0.01% |
88,800
-315,100
| -78% | -$15.7M |
|
1660
CALL
Tronox
TROX
$995M
| $4.46M | ﹤0.01% |
314,800
-31,600
| -9% | -$388K |
|
1661
CALL
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.15B
| $4.46M | ﹤0.01% |
41,400
+11,600
| +39% | +$699K |
|
1662
CALL
XP
XP
$8.62B
| $4.46M | ﹤0.01% |
170,900
+128,000
| +298% | +$2.92M |
|
1663
CALL
Barclays
BCS
$94.1B
| $4.45M | ﹤0.01% |
564,900
+209,200
| +59% | +$1.51M |
|
1664
PUT
Ameren
AEE
$31.5B
| $4.45M | ﹤0.01% |
61,500
-12,300
| -17% | -$936K |
|
|
SPWR
1665
CALL
DELISTED
SunPower Corporation Common Stock
SPWR
| $4.44M | ﹤0.01% |
920,100
+506,600
| +123% | +$2.42M |
|
1666
PUT
Chegg
CHGG
$108M
| $4.44M | ﹤0.01% |
391,100
+53,600
| +16% | +$509K |
|
1667
PUT
Olin
OLN
$2.64B
| $4.44M | ﹤0.01% |
82,300
+27,500
| +50% | +$1.32M |
|
1668
PUT
Xcel Energy
XEL
$51B
| $4.44M | ﹤0.01% |
71,700
-1,700
| -2% | -$102K |
|
1669
CALL
Dynatrace
DT
$12.1B
| $4.43M | ﹤0.01% |
81,000
-31,400
| -28% | -$1.59M |
|
1670
PUT
Pan American Silver
PAAS
$18.6B
| $4.42M | ﹤0.01% |
278,100
+11,200
| +4% | +$168K |
|
|
GRMN
1671
PUT
Garmin
GRMN
$46.9B
| $4.42M | ﹤0.01% |
34,400
+9,500
| +38% | +$1.1M |
|
1672
CALL
Invitation Homes
INVH
$17.7B
| $4.4M | ﹤0.01% |
128,900
-87,700
| -40% | -$2.85M |
|
1673
CALL
Zimmer Biomet
ZBH
$17.7B
| $4.39M | ﹤0.01% |
36,100
+16,400
| +83% | +$1.83M |
|
1674
PUT
MP Materials
MP
$7.35B
| $4.39M | ﹤0.01% |
221,300
+68,900
| +45% | +$1.18M |
|
|
SWN
1675
CALL
DELISTED
Southwestern Energy Company
SWN
| $4.39M | ﹤0.01% |
670,100
+387,800
| +137% | +$2.59M |
|
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.