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 | |
|---|---|---|---|---|---|---|
7076
CALL
Federated Hermes
FHI
$4.5B
| $16K | ﹤0.01% |
500
-900
| -64% | -$29.3K |
|
7077
CALL
Gildan
GIL
$9.38B
| $16K | ﹤0.01% |
500
-800
| -62% | -$25.9K |
|
7078
iShares International Treasury Bond ETF
IGOV
$1.51B
| $16K | ﹤0.01% |
+400
| New | +$15.4K |
|
7079
The Joint Corp
JYNT
$122M
| $16K | ﹤0.01% |
1,706
+1,209
| +243% | +$10.5K |
|
7080
Lakeland Industries
LAKE
$106M
| $16K | ﹤0.01% |
903
+338
| +60% | +$5.2K |
|
7081
Lincoln Electric
LECO
$14.1B
| $16K | ﹤0.01% |
78
-289
| -79% | -$55.8K |
|
7082
PUT
MediaAlpha
MAX
$734M
| $16K | ﹤0.01% |
1,500
-100
| -6% | -$990 |
|
|
ONT
7083
CALL
Onterris Inc
ONT
$718M
| $16K | ﹤0.01% |
+500
| New | +$14.4K |
|
|
MSB
7084
PUT
Mesabi Trust
MSB
$297M
| $16K | ﹤0.01% |
800
-400
| -33% | -$7.91K |
|
7085
CALL
NewtekOne
NEWT
$415M
| $16K | ﹤0.01% |
1,200
+600
| +100% | +$8.39K |
|
|
NOTV
7086
PUT
DELISTED
Inotiv
NOTV
| $16K | ﹤0.01% |
4,600
+600
| +15% | +$1.51K |
|
7087
PUT
Novanta
NOVT
$5.01B
| $16K | ﹤0.01% |
+100
| New | +$14.6K |
|
7088
OneSpaWorld
OSW
$2.76B
| $16K | ﹤0.01% |
1,189
+1,179
| +11,790% | +$13.7K |
|
7089
PUT
Pangaea Logistics
PANL
$488M
| $16K | ﹤0.01% |
+2,000
| New | +$13.5K |
|
7090
iShares MSCI Global Metals & Mining Producers ETF
PICK
$2.19B
| $16K | ﹤0.01% |
+394
| New | +$15.7K |
|
7091
PUT
Riley Exploration Permian
REPX
$740M
| $16K | ﹤0.01% |
600
-2,200
| -79% | -$62.1K |
|
7092
CALL
Reynolds Consumer Products
REYN
$5.37B
| $16K | ﹤0.01% |
600
-100
| -14% | -$2.61K |
|
7093
PUT
Reinsurance Group of America
RGA
$15.7B
| $16K | ﹤0.01% |
+100
| New | +$15.6K |
|
7094
Ryman Hospitality Properties
RHP
$8.52B
| $16K | ﹤0.01% |
152
-353
| -70% | -$33.6K |
|
7095
PUT
Rigel Pharmaceuticals
RIGL
$692M
| $16K | ﹤0.01% |
1,170
-140
| -11% | -$1.43K |
|
7096
SGHC Ltd
SGHC
$7.45B
| $16K | ﹤0.01% |
5,058
+3,293
| +187% | +$11.1K |
|
|
SGMO
7097
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $16K | ﹤0.01% |
30,981
-8,504
| -22% | -$3.92K |
|
7098
CALL
Steven Madden
SHOO
$3.18B
| $16K | ﹤0.01% |
400
-9,600
| -96% | -$349K |
|
|
SLI
7099
PUT
Standard Lithium
SLI
$519M
| $16K | ﹤0.01% |
8,100
-5,500
| -40% | -$13.7K |
|
|
SPTN
7100
CALL
DELISTED
SpartanNash
SPTN
| $16K | ﹤0.01% |
700
-4,000
| -85% | -$90.9K |
|
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.