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 | |
|---|---|---|---|---|---|---|
2251
PUT
Gen Digital
GEN
$15.6B
| $1.42M | ﹤0.01% |
82,800
+30,700
| +59% | +$616K |
|
|
DENT
2252
PUT
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $1.42M | ﹤0.01% |
237,100
-125,500
| -35% | -$751K |
|
|
BBBY
2253
CALL
DELISTED
Bed Bath & Beyond Inc
BBBY
| $1.42M | ﹤0.01% |
3,317,600
+153,000
| +5% | +$315K |
|
|
MFA
2254
CALL
MFA Financial
MFA
$929M
| $1.42M | ﹤0.01% |
142,800
-26,600
| -16% | -$282K |
|
2255
PUT
Bath & Body Works
BBWI
$4.01B
| $1.42M | ﹤0.01% |
38,700
-250,000
| -87% | -$10.5M |
|
2256
CALL
Hecla Mining
HL
$10.2B
| $1.41M | ﹤0.01% |
223,500
-42,000
| -16% | -$241K |
|
2257
CALL
Tradeweb Markets
TW
$21.3B
| $1.41M | ﹤0.01% |
17,900
+8,500
| +90% | +$616K |
|
2258
Vermilion Energy
VET
$1.73B
| $1.41M | ﹤0.01% |
109,061
+80,142
| +277% | +$1.13M |
|
|
DO
2259
CALL
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $1.41M | ﹤0.01% |
+117,500
| New | +$1.35M |
|
|
GLOP
2260
PUT
DELISTED
GASLOG PARTNERS LP
GLOP
| $1.41M | ﹤0.01% |
168,000
-30,900
| -16% | -$249K |
|
2261
PUT
Dine Brands
DIN
$432M
| $1.41M | ﹤0.01% |
20,900
+13,100
| +168% | +$961K |
|
|
DEN
2262
CALL
DELISTED
Denbury Inc.
DEN
| $1.41M | ﹤0.01% |
16,100
+10,700
| +198% | +$900K |
|
2263
CALL
Ardelyx
ARDX
$1.24B
| $1.41M | ﹤0.01% |
293,800
-103,700
| -26% | -$350K |
|
|
ONTF
2264
PUT
DELISTED
ON24
ONTF
| $1.4M | ﹤0.01% |
+160,300
| New | +$1.42M |
|
|
CTLP
2265
CALL
DELISTED
Cantaloupe
CTLP
| $1.4M | ﹤0.01% |
245,700
+237,900
| +3,050% | +$1.27M |
|
2266
PUT
Quest Diagnostics
DGX
$25.1B
| $1.4M | ﹤0.01% |
9,900
+7,200
| +267% | +$1.03M |
|
2267
Samsara
IOT
$19.3B
| $1.4M | ﹤0.01% |
71,006
+16,378
| +30% | +$260K |
|
2268
PUT
Royal Gold
RGLD
$17.1B
| $1.4M | ﹤0.01% |
10,800
+10,300
| +2,060% | +$1.27M |
|
|
SI
2269
PUT
DELISTED
Silvergate Capital Corporation
SI
| $1.4M | ﹤0.01% |
864,300
+270,300
| +46% | +$2.93M |
|
2270
PUT
PTC Therapeutics
PTCT
$6.37B
| $1.4M | ﹤0.01% |
28,900
+28,800
| +28,800% | +$1.32M |
|
2271
Direxion Daily Small Cap Bear 3x ETF
TZA
$213M
| $1.4M | ﹤0.01% |
+4,493
| New | +$1.34M |
|
2272
CALL
GXO Logistics
GXO
$6.06B
| $1.4M | ﹤0.01% |
27,700
+19,700
| +246% | +$980K |
|
2273
CALL
Tanger
SKT
$4.82B
| $1.39M | ﹤0.01% |
71,000
-50,900
| -42% | -$944K |
|
|
ARCH
2274
PUT
DELISTED
Arch Resources, Inc.
ARCH
| $1.39M | ﹤0.01% |
10,600
+4,400
| +71% | +$636K |
|
2275
Invesco S&P 500 Low Volatility ETF
SPLV
$7.2B
| $1.39M | ﹤0.01% |
+22,284
| New | +$1.39M |
|
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.