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 | |
|---|---|---|---|---|---|---|
|
APLT
4476
DELISTED
Applied Therapeutics
APLT
| $241K | ﹤0.01% |
+71,991
| New | +$179K |
|
4477
CALL
Brookfield Renewable
BEP
$9.6B
| $241K | ﹤0.01% |
9,200
-600
| -6% | -$14.2K |
|
4478
James River Group Holdings
JRVR
$219M
| $241K | ﹤0.01% |
26,101
+25,868
| +11,102% | +$297K |
|
4479
PUT
Kamada
KMDA
$404M
| $241K | ﹤0.01% |
+39,400
| New | +$199K |
|
|
TGNA
4480
PUT
DELISTED
TEGNA Inc
TGNA
| $241K | ﹤0.01% |
15,800
-7,100
| -31% | -$106K |
|
4481
PUT
Astrana Health
ASTH
$1.81B
| $241K | ﹤0.01% |
+6,300
| New | +$210K |
|
4482
PUT
Allot
ALLT
$362M
| $240K | ﹤0.01% |
145,900
-147,800
| -50% | -$246K |
|
4483
Dyne Therapeutics
DYN
$4.15B
| $240K | ﹤0.01% |
18,061
-17,971
| -50% | -$176K |
|
4484
CALL
Grindr
GRND
$3.06B
| $240K | ﹤0.01% |
27,400
+27,100
| +9,033% | +$183K |
|
4485
Hexcel
HXL
$7.97B
| $240K | ﹤0.01% |
3,263
+1,562
| +92% | +$106K |
|
4486
CALL
Perella Weinberg Partners
PWP
$1.08B
| $240K | ﹤0.01% |
19,700
+8,000
| +68% | +$87.1K |
|
4487
CALL
Ryanair
RYAAY
$30B
| $240K | ﹤0.01% |
4,500
-39,000
| -90% | -$1.71M |
|
4488
PUT
Sylvamo
SLVM
$1.52B
| $240K | ﹤0.01% |
4,900
+1,600
| +48% | +$74.8K |
|
|
YALA
4489
PUT
Yalla Group
YALA
$814M
| $240K | ﹤0.01% |
39,200
-2,500
| -6% | -$14.2K |
|
4490
CALL
ASE Group
ASX
$68.3B
| $239K | ﹤0.01% |
25,400
+21,000
| +477% | +$174K |
|
4491
PUT
Algonquin Power & Utilities
AQN
$4.59B
| $238K | ﹤0.01% |
37,700
+10,600
| +39% | +$61.9K |
|
4492
Jones Lang LaSalle
JLL
$15.8B
| $238K | ﹤0.01% |
1,261
-165
| -12% | -$25K |
|
4493
Newell Brands
NWL
$2.21B
| $238K | ﹤0.01% |
+27,519
| New | +$210K |
|
4494
Post Holdings
POST
$4.42B
| $238K | ﹤0.01% |
2,707
-6,901
| -72% | -$586K |
|
|
SMAR
4495
DELISTED
Smartsheet Inc.
SMAR
| $238K | ﹤0.01% |
4,984
+3,696
| +287% | +$158K |
|
4496
CALL
BJ's Restaurants
BJRI
$1.47B
| $237K | ﹤0.01% |
6,600
+6,000
| +1,000% | +$171K |
|
4497
PUT
Blackstone Secured Lending
BXSL
$5.36B
| $237K | ﹤0.01% |
8,600
+800
| +10% | +$22.1K |
|
4498
CALL
GrowGeneration
GRWG
$84.7M
| $237K | ﹤0.01% |
94,700
-162,600
| -63% | -$398K |
|
|
HIBB
4499
CALL
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $237K | ﹤0.01% |
3,300
+800
| +32% | +$44.8K |
|
4500
iShares US Regional Banks ETF
IAT
$673M
| $236K | ﹤0.01% |
5,664
-7,939
| -58% | -$285K |
|
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.