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 | |
|---|---|---|---|---|---|---|
3001
CALL
Buckle
BKE
$2.23B
| $656K | ﹤0.01% |
18,400
-7,300
| -28% | -$299K |
|
3002
W.W. Grainger
GWW
$65.5B
| $656K | ﹤0.01% |
953
-8,029
| -89% | -$5.12M |
|
3003
Lincoln National
LNC
$8.05B
| $655K | ﹤0.01% |
29,163
-5,774
| -17% | -$172K |
|
3004
CALL
Sonos
SONO
$1.79B
| $655K | ﹤0.01% |
33,400
-196,800
| -85% | -$3.75M |
|
3005
Keurig Dr Pepper
KDP
$40.5B
| $654K | ﹤0.01% |
18,554
-14,720
| -44% | -$517K |
|
3006
PUT
Pediatrix Medical
MD
$2.15B
| $654K | ﹤0.01% |
43,900
+40,100
| +1,055% | +$607K |
|
|
SAFE
3007
Safehold
SAFE
$1.19B
| $654K | ﹤0.01% |
24,259
+22,308
| +1,143% | +$1.12M |
|
3008
CALL
United Natural Foods
UNFI
$3.07B
| $653K | ﹤0.01% |
24,800
-45,800
| -65% | -$1.67M |
|
3009
CALL
Kimco Realty
KIM
$17.6B
| $652K | ﹤0.01% |
33,400
+8,700
| +35% | +$179K |
|
3010
Seres Therapeutics
MCRB
$50.6M
| $652K | ﹤0.01% |
5,755
+5,508
| +2,230% | +$596K |
|
|
WRK
3011
CALL
DELISTED
WestRock Company
WRK
| $652K | ﹤0.01% |
21,400
+11,700
| +121% | +$386K |
|
3012
CALL
AeroVironment
AVAV
$7.79B
| $650K | ﹤0.01% |
7,100
+5,900
| +492% | +$522K |
|
|
TTCF
3013
PUT
DELISTED
Tattooed Chef, Inc Class A Common Stock
TTCF
| $650K | ﹤0.01% |
457,900
+72,600
| +19% | +$99.8K |
|
3014
PUT
Simply Good Foods
SMPL
$919M
| $648K | ﹤0.01% |
+16,300
| New | +$602K |
|
3015
CALL
Insmed
INSM
$23.1B
| $647K | ﹤0.01% |
38,000
+19,200
| +102% | +$373K |
|
3016
CALL
Fidelity National Financial
FNF
$14B
| $646K | ﹤0.01% |
18,500
-5,200
| -22% | -$205K |
|
3017
Landstar System
LSTR
$6.69B
| $644K | ﹤0.01% |
3,594
+3,268
| +1,002% | +$575K |
|
3018
VanEck Steel ETF
SLX
$166M
| $644K | ﹤0.01% |
+10,111
| New | +$653K |
|
|
EH
3019
CALL
EHang Holdings
EH
$392M
| $643K | ﹤0.01% |
58,900
-38,000
| -39% | -$442K |
|
3020
Huazhu Hotels Group
HTHT
$12.7B
| $643K | ﹤0.01% |
13,142
-18,799
| -59% | -$910K |
|
3021
CALL
TH International
THCH
$53.2M
| $643K | ﹤0.01% |
31,640
+31,140
| +6,228% | +$627K |
|
3022
CALL
Bally's
BALY
$681M
| $642K | ﹤0.01% |
32,900
| – | – |
|
3023
CALL
Box
BOX
$4.12B
| $642K | ﹤0.01% |
24,000
-40,000
| -63% | -$1.21M |
|
3024
Magna International
MGA
$18.1B
| $641K | ﹤0.01% |
11,972
+9,851
| +464% | +$570K |
|
3025
CALL
Burford Capital
BUR
$914M
| $640K | ﹤0.01% |
57,900
+34,500
| +147% | +$286K |
|
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.