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 | |
|---|---|---|---|---|---|---|
|
DENT
1251
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $7.92M | 0.01% |
1,142,900
-262,000
| -19% | -$1.81M |
|
1252
PUT
Corteva
CTVA
$59.1B
| $7.9M | 0.01% |
164,900
+117,600
| +249% | +$5.61M |
|
1253
CALL
VF Corp
VFC
$6.5B
| $7.87M | 0.01% |
418,500
-86,300
| -17% | -$1.48M |
|
1254
PUT
Lantheus
LNTH
$6.77B
| $7.86M | 0.01% |
126,800
-107,100
| -46% | -$7.26M |
|
1255
PUT
Helen of Troy
HELE
$630M
| $7.85M | 0.01% |
65,000
+9,100
| +16% | +$981K |
|
1256
CALL
Cintas
CTAS
$81.7B
| $7.83M | 0.01% |
52,000
+8,800
| +20% | +$1.18M |
|
1257
PUT
JB Hunt Transport Services
JBHT
$27.1B
| $7.83M | 0.01% |
39,200
+9,300
| +31% | +$1.72M |
|
1258
CALL
Manhattan Associates
MANH
$9B
| $7.82M | 0.01% |
36,300
+31,000
| +585% | +$6.56M |
|
1259
CALL
Gartner
IT
$9.25B
| $7.8M | 0.01% |
17,300
+15,800
| +1,053% | +$6.31M |
|
1260
PUT
Scotiabank
BNS
$106B
| $7.79M | 0.01% |
160,000
+50,400
| +46% | +$2.22M |
|
1261
PUT
Centene
CNC
$31.5B
| $7.76M | 0.01% |
104,600
+19,200
| +22% | +$1.39M |
|
1262
PUT
Deutsche Bank
DB
$66.1B
| $7.71M | ﹤0.01% |
569,400
+8,200
| +1% | +$96.5K |
|
1263
CALL
American Eagle Outfitters
AEO
$2.81B
| $7.7M | ﹤0.01% |
363,900
+97,200
| +36% | +$1.81M |
|
1264
CALL
Yelp
YELP
$1.36B
| $7.7M | ﹤0.01% |
162,600
+31,500
| +24% | +$1.39M |
|
1265
CALL
Opendoor
OPEN
$3.71B
| $7.68M | ﹤0.01% |
1,772,787
+783,784
| +79% | +$2.19M |
|
1266
BHP
BHP
$211B
| $7.68M | ﹤0.01% |
112,500
+52,279
| +87% | +$3.16M |
|
1267
PUT
Penumbra
PEN
$12.5B
| $7.67M | ﹤0.01% |
30,500
+17,200
| +129% | +$3.8M |
|
1268
CALL
SL Green Realty
SLG
$3.87B
| $7.66M | ﹤0.01% |
169,600
-79,400
| -32% | -$2.93M |
|
1269
PUT
Planet Fitness
PLNT
$4.29B
| $7.66M | ﹤0.01% |
104,900
+42,700
| +69% | +$2.63M |
|
|
IPFF
1270
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $7.66M | ﹤0.01% |
159,700
+51,000
| +47% | +$2.44M |
|
1271
PUT
Tower Semiconductor
TSEM
$27.5B
| $7.64M | ﹤0.01% |
250,300
+134,200
| +116% | +$3.5M |
|
|
KRTX
1272
PUT
DELISTED
Karuna Therapeutics, Inc. Common Stock
KRTX
| $7.6M | ﹤0.01% |
24,000
+11,600
| +94% | +$2.25M |
|
|
DOOR
1273
CALL
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $7.59M | ﹤0.01% |
89,700
+88,100
| +5,506% | +$7.62M |
|
1274
CALL
Monolithic Power Systems
MPWR
$66.1B
| $7.57M | ﹤0.01% |
12,000
-3,800
| -24% | -$1.99M |
|
|
NVO
1275
Novo Nordisk
NVO
$217B
| $7.57M | ﹤0.01% |
73,151
+8,246
| +13% | +$815K |
|
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.