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 | |
|---|---|---|---|---|---|---|
3576
PUT
Alamos Gold
AGI
$12.5B
| $371K | ﹤0.01% |
30,400
-127,700
| -81% | -$1.38M |
|
3577
Murphy USA
MUSA
$11.3B
| $371K | ﹤0.01% |
1,439
+1,048
| +268% | +$273K |
|
3578
CALL
Schneider National
SNDR
$6.44B
| $371K | ﹤0.01% |
13,900
| – | – |
|
|
VRNA
3579
CALL
DELISTED
Verona Pharma
VRNA
| $371K | ﹤0.01% |
18,500
-76,700
| -81% | -$1.66M |
|
3580
CALL
DoubleVerify
DV
$1.68B
| $370K | ﹤0.01% |
12,300
-11,900
| -49% | -$312K |
|
3581
CALL
Newegg Commerce
NEGG
$301M
| $370K | ﹤0.01% |
13,830
+7,375
| +114% | +$230K |
|
|
OLPX
3582
PUT
DELISTED
Olaplex Holdings
OLPX
| $370K | ﹤0.01% |
86,700
-100
| -0.1% | -$533 |
|
3583
CALL
Children's Place
PLCE
$52.8M
| $370K | ﹤0.01% |
9,200
-800
| -8% | -$32.9K |
|
3584
CALL
Cemex
CX
$17.6B
| $369K | ﹤0.01% |
66,800
-22,900
| -26% | -$116K |
|
3585
CALL
Dillards
DDS
$8.96B
| $369K | ﹤0.01% |
1,200
-6,700
| -85% | -$2.38M |
|
3586
CALL
WEC Energy
WEC
$37.1B
| $369K | ﹤0.01% |
3,900
-3,900
| -50% | -$361K |
|
|
DSKE
3587
PUT
DELISTED
Daseke, Inc. Common Stock
DSKE
| $369K | ﹤0.01% |
47,800
+32,700
| +217% | +$240K |
|
3588
Acuity Brands
AYI
$10.1B
| $368K | ﹤0.01% |
+2,015
| New | +$372K |
|
|
KDNY
3589
CALL
DELISTED
Chinook Therapeutics, Inc. Common Stock
KDNY
| $368K | ﹤0.01% |
15,900
+9,600
| +152% | +$229K |
|
|
ADN
3590
CALL
DELISTED
Advent Technologies
ADN
| $367K | ﹤0.01% |
11,543
+10,966
| +1,901% | +$553K |
|
3591
CALL
Ares Management
ARES
$28.8B
| $367K | ﹤0.01% |
4,400
+2,400
| +120% | +$191K |
|
3592
CALL
Vivid Seats
SEAT
$84.8M
| $367K | ﹤0.01% |
2,410
+2,380
| +7,933% | +$372K |
|
|
TPH
3593
PUT
DELISTED
Tri Pointe Homes
TPH
| $367K | ﹤0.01% |
14,500
-2,100
| -13% | -$47.6K |
|
3594
CALL
United Parks & Resorts
PRKS
$2.12B
| $367K | ﹤0.01% |
6,000
-17,600
| -75% | -$1.08M |
|
|
NVRO
3595
DELISTED
NEVRO CORP.
NVRO
| $367K | ﹤0.01% |
10,155
+6,820
| +204% | +$240K |
|
3596
CALL
Braze
BRZE
$2.65B
| $366K | ﹤0.01% |
10,600
+1,500
| +16% | +$46.7K |
|
|
DEA
3597
PUT
Easterly Government Properties
DEA
$1.17B
| $366K | ﹤0.01% |
10,680
+7,560
| +242% | +$283K |
|
3598
PUT
ProShares UltraShort Industrials
SIJ
$5.69M
| $366K | ﹤0.01% |
3,525
+2,575
| +271% | +$151K |
|
3599
CALL
Veritone
VERI
$100M
| $366K | ﹤0.01% |
62,900
+54,400
| +640% | +$374K |
|
3600
PUT
Celestica
CLS
$36.6B
| $365K | ﹤0.01% |
28,300
+28,000
| +9,333% | +$358K |
|
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.