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 | |
|---|---|---|---|---|---|---|
3376
CALL
Vanguard Total Bond Market
BND
$158B
| $452K | ﹤0.01% |
6,200
+4,500
| +265% | +$329K |
|
3377
CALL
Americold
COLD
$4.17B
| $452K | ﹤0.01% |
15,900
-4,200
| -21% | -$125K |
|
3378
CALL
Essential Properties Realty Trust
EPRT
$6.9B
| $452K | ﹤0.01% |
18,200
+2,500
| +16% | +$61.6K |
|
3379
CALL
Macerich
MAC
$7.41B
| $452K | ﹤0.01% |
42,700
-80,100
| -65% | -$951K |
|
3380
PUT
Antero Midstream
AM
$10.4B
| $451K | ﹤0.01% |
43,000
-35,700
| -45% | -$380K |
|
3381
CALL
Edison International
EIX
$30.3B
| $451K | ﹤0.01% |
6,400
-44,300
| -87% | -$2.99M |
|
3382
Remitly
RELY
$4.77B
| $451K | ﹤0.01% |
26,613
+2,761
| +12% | +$37.5K |
|
|
KDNY
3383
PUT
DELISTED
Chinook Therapeutics, Inc. Common Stock
KDNY
| $451K | ﹤0.01% |
19,500
+18,900
| +3,150% | +$451K |
|
3384
PUT
Evercore
EVR
$13.2B
| $449K | ﹤0.01% |
3,900
+800
| +26% | +$99.4K |
|
3385
PUT
Flowers Foods
FLO
$1.62B
| $449K | ﹤0.01% |
16,400
+14,800
| +925% | +$408K |
|
|
ODP
3386
PUT
DELISTED
ODP
ODP
| $449K | ﹤0.01% |
10,000
+6,100
| +156% | +$298K |
|
3387
PUT
Urban Outfitters
URBN
$6.22B
| $449K | ﹤0.01% |
16,200
-200,300
| -93% | -$5.39M |
|
3388
United Parks & Resorts
PRKS
$2.12B
| $449K | ﹤0.01% |
+7,331
| New | +$448K |
|
3389
CALL
Cooper Companies
COO
$13.7B
| $448K | ﹤0.01% |
4,800
-21,600
| -82% | -$1.86M |
|
3390
Petrobras Class A
PBR.A
$103B
| $447K | ﹤0.01% |
48,270
+16,499
| +52% | +$159K |
|
3391
CALL
SELLAS Life Sciences
SLS
$2.13B
| $447K | ﹤0.01% |
312,600
+199,800
| +177% | +$494K |
|
|
GOGL
3392
CALL
DELISTED
Golden Ocean Group
GOGL
| $446K | ﹤0.01% |
46,900
+19,300
| +70% | +$182K |
|
3393
Prosperity Bancshares
PB
$8.69B
| $446K | ﹤0.01% |
+7,250
| New | +$516K |
|
3394
Stem
STEM
$50M
| $446K | ﹤0.01% |
+3,934
| New | +$667K |
|
3395
Wolfspeed
WOLF
$1.24B
| $446K | ﹤0.01% |
+6,882
| New | +$503K |
|
|
TEN
3396
Tsakos Energy Navigation Ltd
TEN
$1.18B
| $446K | ﹤0.01% |
22,973
+13,201
| +135% | +$258K |
|
|
ACRE
3397
CALL
Ares Commercial Real Estate
ACRE
$257M
| $445K | ﹤0.01% |
49,000
+2,700
| +6% | +$29.5K |
|
3398
PUT
eHealth
EHTH
$43.2M
| $445K | ﹤0.01% |
47,600
+8,600
| +22% | +$67.6K |
|
|
ESPR
3399
CALL
DELISTED
Esperion Therapeutics
ESPR
| $445K | ﹤0.01% |
280,400
-620,500
| -69% | -$3.2M |
|
3400
CALL
Principal Financial Group
PFG
$24B
| $445K | ﹤0.01% |
6,000
-2,600
| -30% | -$221K |
|
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.