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 | |
|---|---|---|---|---|---|---|
2201
CoreCivic
CXW
$3.1B
| $2.42M | ﹤0.01% |
166,604
+12,595
| +8% | +$166K |
|
2202
PUT
Sprouts Farmers Market
SFM
$7.04B
| $2.42M | ﹤0.01% |
50,300
+23,500
| +88% | +$1.03M |
|
2203
PUT
BWX Technologies
BWXT
$16B
| $2.42M | ﹤0.01% |
31,500
-42,400
| -57% | -$3.26M |
|
2204
CALL
SM Energy
SM
$7.96B
| $2.42M | ﹤0.01% |
62,400
+37,300
| +149% | +$1.44M |
|
2205
CALL
CVR Energy
CVI
$3.36B
| $2.41M | ﹤0.01% |
79,700
+60,900
| +324% | +$1.92M |
|
2206
CALL
iShares Convertible Bond ETF
ICVT
$7.23B
| $2.41M | ﹤0.01% |
80,800
-265,400
| -77% | -$19.7M |
|
|
CGC
2207
PUT
Canopy Growth
CGC
$375M
| $2.41M | ﹤0.01% |
472,000
+408,280
| +641% | +$2.43M |
|
|
PGTI
2208
CALL
DELISTED
PGT, Inc.
PGTI
| $2.41M | ﹤0.01% |
59,200
-6,200
| -9% | -$202K |
|
2209
CALL
California Resources
CRC
$4.75B
| $2.4M | ﹤0.01% |
44,000
+8,700
| +25% | +$457K |
|
2210
CALL
Weis Markets
WMK
$1.82B
| $2.4M | ﹤0.01% |
37,500
+35,800
| +2,106% | +$2.28M |
|
2211
CALL
Huron Consulting
HURN
$1.82B
| $2.38M | ﹤0.01% |
23,200
+14,800
| +176% | +$1.52M |
|
2212
CALL
Hormel Foods
HRL
$13.9B
| $2.38M | ﹤0.01% |
74,200
-59,700
| -45% | -$1.95M |
|
2213
CALL
Apple Hospitality REIT
APLE
$3.96B
| $2.38M | ﹤0.01% |
143,300
+87,000
| +155% | +$1.41M |
|
2214
UBS Group
UBS
$170B
| $2.38M | ﹤0.01% |
77,055
-1,894
| -2% | -$49.8K |
|
2215
PUT
Global E Online
GLBE
$6.08B
| $2.38M | ﹤0.01% |
60,000
+41,900
| +231% | +$1.51M |
|
2216
Global X Uranium ETF
URA
$5.52B
| $2.38M | ﹤0.01% |
+85,841
| New | +$2.36M |
|
2217
Corteva
CTVA
$59.7B
| $2.38M | ﹤0.01% |
49,574
+43,273
| +687% | +$2.06M |
|
2218
CALL
Boyd Gaming
BYD
$6.47B
| $2.37M | ﹤0.01% |
37,900
-10,300
| -21% | -$610K |
|
|
DQ
2219
CALL
Daqo New Energy
DQ
$790M
| $2.36M | ﹤0.01% |
88,800
+16,600
| +23% | +$423K |
|
|
SMAR
2220
CALL
DELISTED
Smartsheet Inc.
SMAR
| $2.36M | ﹤0.01% |
49,400
+28,700
| +139% | +$1.22M |
|
2221
PUT
Franklin Resources
BEN
$16.9B
| $2.36M | ﹤0.01% |
79,100
+42,400
| +116% | +$1.05M |
|
2222
CALL
Children's Place
PLCE
$53.6M
| $2.35M | ﹤0.01% |
101,400
+63,800
| +170% | +$1.55M |
|
2223
PUT
Qorvo
QRVO
$7.63B
| $2.35M | ﹤0.01% |
20,900
-56,100
| -73% | -$5.42M |
|
2224
CALL
Kratos Defense & Security Solutions
KTOS
$8.88B
| $2.35M | ﹤0.01% |
115,900
+98,600
| +570% | +$1.81M |
|
2225
CALL
Carpenter Technology
CRS
$30B
| $2.35M | ﹤0.01% |
33,200
+15,200
| +84% | +$1.02M |
|
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.