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 | |
|---|---|---|---|---|---|---|
|
PR
1276
CALL
Permian Resources
PR
$17.9B
| $7.56M | ﹤0.01% |
556,000
+202,800
| +57% | +$2.78M |
|
1277
PUT
Coherent
COHR
$61.3B
| $7.55M | ﹤0.01% |
173,500
-63,200
| -27% | -$2.28M |
|
1278
CALL
Darling Ingredients
DAR
$10.1B
| $7.55M | ﹤0.01% |
151,500
+115,400
| +320% | +$5.24M |
|
|
1279
CALL
Coherent
COHR
$61.3B
| $7.54M | ﹤0.01% |
173,100
-330,900
| -66% | -$11.9M |
|
1280
PUT
Unilever
UL
$130B
| $7.51M | ﹤0.01% |
137,778
+14,578
| +12% | +$786K |
|
1281
PUT
BRC Group Holdings
RILY
$279M
| $7.51M | ﹤0.01% |
357,700
+348,400
| +3,746% | +$10.2M |
|
1282
CALL
TE Connectivity
TEL
$57.6B
| $7.5M | ﹤0.01% |
53,400
+27,300
| +105% | +$3.51M |
|
1283
CALL
Qorvo
QRVO
$7.65B
| $7.5M | ﹤0.01% |
66,600
+12,500
| +23% | +$1.21M |
|
1284
CALL
Fastenal
FAST
$53B
| $7.48M | ﹤0.01% |
231,000
-47,000
| -17% | -$1.42M |
|
1285
CALL
Applovin
APP
$134B
| $7.48M | ﹤0.01% |
187,700
+20,300
| +12% | +$796K |
|
|
PXD
1286
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $7.47M | ﹤0.01% |
33,200
-58,700
| -64% | -$13.8M |
|
1287
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$107M
| $7.44M | ﹤0.01% |
311,200
+91,900
| +42% | +$2.04M |
|
1288
PUT
CoStar Group
CSGP
$11.1B
| $7.44M | ﹤0.01% |
85,100
+34,100
| +67% | +$2.76M |
|
1289
Truist Financial
TFC
$62.5B
| $7.43M | ﹤0.01% |
201,271
+1,390
| +0.7% | +$43.6K |
|
|
FITB
1290
PUT
Fifth Third Bancorp
FITB
$51.8B
| $7.42M | ﹤0.01% |
215,300
+137,900
| +178% | +$3.83M |
|
1291
PUT
Core & Main
CNM
$8.07B
| $7.39M | ﹤0.01% |
+182,800
| New | +$6.19M |
|
1292
CALL
Sunoco
SUN
$14.1B
| $7.38M | ﹤0.01% |
123,200
+49,200
| +66% | +$2.62M |
|
1293
PUT
BioMarin Pharmaceuticals
BMRN
$11.4B
| $7.38M | ﹤0.01% |
76,500
+35,400
| +86% | +$3.13M |
|
1294
PUT
Ares Management
ARES
$27.4B
| $7.37M | ﹤0.01% |
62,000
+61,400
| +10,233% | +$6.67M |
|
1295
PUT
Sigma Lithium
SGML
$1.12B
| $7.37M | ﹤0.01% |
233,700
+182,800
| +359% | +$5.1M |
|
|
IRBT
1296
CALL
DELISTED
iRobot
IRBT
| $7.34M | ﹤0.01% |
189,800
+181,500
| +2,187% | +$6.46M |
|
|
HCP
1297
CALL
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $7.34M | ﹤0.01% |
310,600
+107,000
| +53% | +$2.32M |
|
1298
PUT
Cardinal Health
CAH
$52.9B
| $7.34M | ﹤0.01% |
72,800
+3,100
| +4% | +$308K |
|
1299
CALL
GE HealthCare
GEHC
$28.2B
| $7.34M | ﹤0.01% |
94,900
+700
| +0.7% | +$49K |
|
1300
CALL
Campbell Soup
CPB
$6.38B
| $7.33M | ﹤0.01% |
169,600
+87,000
| +105% | +$3.58M |
|
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.