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 | |
|---|---|---|---|---|---|---|
2651
PUT
Rithm Capital
RITM
$5.09B
| $943K | ﹤0.01% |
117,900
+50,900
| +76% | +$448K |
|
2652
CALL
Dave & Buster's
PLAY
$343M
| $941K | ﹤0.01% |
25,600
-43,600
| -63% | -$1.74M |
|
2653
PUT
Dynatrace
DT
$12.1B
| $939K | ﹤0.01% |
22,200
-51,700
| -70% | -$2.09M |
|
2654
CALL
MarketAxess Holdings
MKTX
$4.15B
| $939K | ﹤0.01% |
2,400
+1,600
| +200% | +$567K |
|
2655
BioMarin Pharmaceuticals
BMRN
$11.5B
| $938K | ﹤0.01% |
+9,652
| New | +$1M |
|
|
DRRX
2656
CALL
DELISTED
DURECT Corp
DRRX
| $938K | ﹤0.01% |
207,100
+155,500
| +301% | +$844K |
|
2657
CALL
New Oriental
EDU
$7.84B
| $934K | ﹤0.01% |
24,200
-390,600
| -94% | -$15.8M |
|
2658
PUT
SentinelOne
S
$6.22B
| $934K | ﹤0.01% |
57,100
-84,300
| -60% | -$1.27M |
|
2659
PUT
Brinker International
EAT
$8.02B
| $931K | ﹤0.01% |
24,500
+22,700
| +1,261% | +$859K |
|
|
GOEV
2660
CALL
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $931K | ﹤0.01% |
3,104
+1,727
| +125% | +$732K |
|
2661
PUT
BioCryst Pharmaceuticals
BCRX
$2.37B
| $930K | ﹤0.01% |
111,600
+23,900
| +27% | +$230K |
|
2662
CALL
GrowGeneration
GRWG
$82.9M
| $930K | ﹤0.01% |
272,100
-191,200
| -41% | -$817K |
|
2663
PUT
Dover
DOV
$27.2B
| $926K | ﹤0.01% |
6,100
+6,000
| +6,000% | +$881K |
|
2664
AGCO
AGCO
$8.78B
| $925K | ﹤0.01% |
6,842
-3,473
| -34% | -$470K |
|
|
EVRI
2665
CALL
DELISTED
Everi Holdings
EVRI
| $924K | ﹤0.01% |
53,900
+49,800
| +1,215% | +$861K |
|
2666
CALL
HF Sinclair
DINO
$15.9B
| $919K | ﹤0.01% |
19,000
-6,500
| -25% | -$338K |
|
2667
CALL
ICICI Bank
IBN
$106B
| $919K | ﹤0.01% |
42,600
+35,600
| +509% | +$743K |
|
2668
PUT
Entegris
ENTG
$19.7B
| $918K | ﹤0.01% |
11,200
+5,100
| +84% | +$413K |
|
2669
Travelers Companies
TRV
$80.8B
| $917K | ﹤0.01% |
+5,351
| New | +$973K |
|
2670
CALL
CDW
CDW
$17.1B
| $915K | ﹤0.01% |
4,700
+2,500
| +114% | +$491K |
|
2671
CALL
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $914K | ﹤0.01% |
7,700
+3,100
| +67% | +$362K |
|
2672
PUT
RCI Hospitality Holdings
RICK
$199M
| $914K | ﹤0.01% |
11,700
+1,700
| +17% | +$147K |
|
2673
PUT
Ambev
ABEV
$47.3B
| $913K | ﹤0.01% |
323,800
-505,000
| -61% | -$1.32M |
|
|
RDFN
2674
PUT
DELISTED
Redfin
RDFN
| $913K | ﹤0.01% |
100,800
-57,000
| -36% | -$425K |
|
|
SRC
2675
CALL
DELISTED
SPIRIT REALTY CAPITAL, INC.
SRC
| $912K | ﹤0.01% |
22,900
+2,900
| +15% | +$120K |
|
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.