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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
GLOP
2901
CALL
DELISTED
GASLOG PARTNERS LP
GLOP
| $723K | ﹤0.01% |
85,900
+38,400
| +81% | +$310K |
|
2902
CALL
Coca-Cola Europacific Partners
CCEP
$46.5B
| $722K | ﹤0.01% |
12,200
+9,100
| +294% | +$509K |
|
2903
CALL
SiriusXM
SIRI
$10B
| $721K | ﹤0.01% |
18,170
-103,720
| -85% | -$4.97M |
|
2904
iShares MSCI United Kingdom ETF
EWU
$4.04B
| $720K | ﹤0.01% |
22,336
-40,832
| -65% | -$1.31M |
|
2905
CALL
Ormat Technologies
ORA
$6.11B
| $720K | ﹤0.01% |
8,500
+5,600
| +193% | +$491K |
|
2906
PUT
Polestar Automotive Holding UK
PSNY
$1.98B
| $720K | ﹤0.01% |
6,333
-2,044
| -24% | -$311K |
|
2907
PUT
Nokia
NOK
$50.8B
| $719K | ﹤0.01% |
146,500
-238,600
| -62% | -$1.13M |
|
2908
RUM Group Inc
RUM
$1.57B
| $719K | ﹤0.01% |
71,976
+71,975
| +7,197,500% | +$648K |
|
2909
CALL
United Therapeutics
UTHR
$26.3B
| $716K | ﹤0.01% |
3,200
-7,100
| -69% | -$1.75M |
|
|
MORF
2910
DELISTED
Morphic Holding, Inc. Common Stock
MORF
| $716K | ﹤0.01% |
+19,026
| New | +$701K |
|
2911
CALL
Xcel Energy
XEL
$51B
| $714K | ﹤0.01% |
10,600
+700
| +7% | +$47.2K |
|
2912
CRISPR Therapeutics
CRSP
$4.58B
| $713K | ﹤0.01% |
15,777
+9,919
| +169% | +$482K |
|
2913
iShares MSCI Italy ETF
EWI
$911M
| $713K | ﹤0.01% |
23,453
+19,534
| +498% | +$581K |
|
2914
PUT
Fomento Económico Mexicano
FMX
$43.3B
| $713K | ﹤0.01% |
7,500
-38,900
| -84% | -$3.4M |
|
2915
CALL
Zeta Global
ZETA
$4.77B
| $713K | ﹤0.01% |
+65,900
| New | +$635K |
|
2916
PUT
Amplify Energy
AMPY
$163M
| $711K | ﹤0.01% |
103,500
-83,900
| -45% | -$689K |
|
2917
PUT
Costamare
CMRE
$1.9B
| $711K | ﹤0.01% |
75,600
+39,900
| +112% | +$393K |
|
2918
Eos Energy Enterprises
EOSE
$1.23B
| $710K | ﹤0.01% |
276,505
+274,905
| +17,182% | +$477K |
|
2919
CALL
RadNet
RDNT
$4.84B
| $708K | ﹤0.01% |
28,300
+7,500
| +36% | +$163K |
|
2920
CALL
Ericsson
ERIC
$30.7B
| $707K | ﹤0.01% |
121,000
-329,200
| -73% | -$1.88M |
|
2921
PUT
Hecla Mining
HL
$10.2B
| $707K | ﹤0.01% |
111,700
-136,100
| -55% | -$781K |
|
2922
PUT
Rapid7
RPD
$634M
| $707K | ﹤0.01% |
15,400
+6,200
| +67% | +$264K |
|
2923
PUT
Kanzhun
BZ
$6.89B
| $706K | ﹤0.01% |
37,100
-79,000
| -68% | -$1.72M |
|
2924
iShares Russell Mid-Cap Growth ETF
IWP
$20B
| $704K | ﹤0.01% |
+7,734
| New | +$690K |
|
2925
PUT
SBA Communications
SBAC
$18.4B
| $704K | ﹤0.01% |
2,700
+1,800
| +200% | +$495K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.