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 | |
|---|---|---|---|---|---|---|
3051
PUT
Black Stone Minerals
BSM
$3.11B
| $618K | ﹤0.01% |
39,400
+17,100
| +77% | +$268K |
|
3052
PUT
Crescent Energy
CRGY
$3.61B
| $618K | ﹤0.01% |
54,700
+27,300
| +100% | +$316K |
|
|
HUT
3053
PUT
Hut 8
HUT
$12.2B
| $618K | ﹤0.01% |
66,900
+19,780
| +42% | +$168K |
|
3054
PUT
United States Brent Oil Fund
BNO
$770M
| $616K | ﹤0.01% |
23,200
+7,600
| +49% | +$206K |
|
|
MAG
3055
DELISTED
MAG Silver
MAG
| $616K | ﹤0.01% |
48,694
+28,939
| +146% | +$388K |
|
3056
PUT
A.O. Smith
AOS
$8.55B
| $615K | ﹤0.01% |
8,900
-4,200
| -32% | -$273K |
|
3057
PUT
LCI Industries
LCII
$2.55B
| $615K | ﹤0.01% |
5,600
-22,200
| -80% | -$2.43M |
|
|
MASI
3058
DELISTED
Masimo
MASI
| $615K | ﹤0.01% |
3,335
+2,504
| +301% | +$422K |
|
|
BLDP
3059
CALL
Ballard Power Systems
BLDP
$877M
| $614K | ﹤0.01% |
110,300
+9,800
| +10% | +$56.6K |
|
3060
PUT
Popular Inc
BPOP
$11B
| $614K | ﹤0.01% |
10,700
+8,700
| +435% | +$567K |
|
3061
Sprouts Farmers Market
SFM
$7.11B
| $614K | ﹤0.01% |
17,530
+4,821
| +38% | +$156K |
|
3062
Acadia Realty Trust
AKR
$2.99B
| $613K | ﹤0.01% |
43,964
-22,434
| -34% | -$325K |
|
3063
PUT
10x Genomics
TXG
$5.96B
| $613K | ﹤0.01% |
11,000
+10,700
| +3,567% | +$500K |
|
3064
PUT
United Parks & Resorts
PRKS
$2.15B
| $613K | ﹤0.01% |
10,000
-5,100
| -34% | -$312K |
|
|
TCN
3065
DELISTED
Tricon Residential Inc.
TCN
| $613K | ﹤0.01% |
+79,171
| New | +$652K |
|
|
CEQP
3066
CALL
DELISTED
Crestwood Equity Partners LP
CEQP
| $613K | ﹤0.01% |
24,600
-49,800
| -67% | -$1.28M |
|
3067
CALL
Brookfield Renewable
BEP
$9.99B
| $611K | ﹤0.01% |
19,400
+10,400
| +116% | +$293K |
|
3068
CALL
Smith & Nephew
SNN
$13B
| $611K | ﹤0.01% |
21,900
+6,900
| +46% | +$196K |
|
3069
Haleon
HLN
$43.5B
| $610K | ﹤0.01% |
75,007
-169,707
| -69% | -$1.35M |
|
|
DCH
3070
PUT
Dauch Corp
DCH
$1.32B
| $609K | ﹤0.01% |
78,000
-44,500
| -36% | -$382K |
|
|
MAG
3071
CALL
DELISTED
MAG Silver
MAG
| $609K | ﹤0.01% |
48,100
-8,300
| -15% | -$111K |
|
|
ERF
3072
PUT
DELISTED
Enerplus Corporation
ERF
| $609K | ﹤0.01% |
42,300
+22,800
| +117% | +$367K |
|
3073
CALL
Altimmune
ALT
$564M
| $608K | ﹤0.01% |
144,200
-125,500
| -47% | -$1.49M |
|
|
KYNB
3074
Kyntra Bio
KYNB
$28.5M
| $608K | ﹤0.01% |
1,304
+1,282
| +5,827% | +$678K |
|
3075
PBF Energy
PBF
$7.27B
| $608K | ﹤0.01% |
+14,044
| New | +$591K |
|
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.