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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1251
CALL
Kyndryl
KD
$2.67B
| $5.52M | ﹤0.01% |
415,500
+299,100
| +257% | +$4.05M |
|
|
DISH
1252
CALL
DELISTED
DISH Network Corp.
DISH
| $5.52M | ﹤0.01% |
837,300
+576,000
| +220% | +$4.08M |
|
1253
CALL
Public Storage
PSA
$60.1B
| $5.52M | ﹤0.01% |
18,900
+2,000
| +12% | +$583K |
|
1254
CALL
WIX.com
WIX
$2.18B
| $5.51M | ﹤0.01% |
70,400
-123,900
| -64% | -$10.2M |
|
1255
CALL
Invitation Homes
INVH
$17.7B
| $5.51M | ﹤0.01% |
160,100
-227,500
| -59% | -$7.6M |
|
1256
Yelp
YELP
$1.4B
| $5.49M | ﹤0.01% |
150,658
+145,433
| +2,783% | +$4.69M |
|
|
FYBR
1257
CALL
DELISTED
Frontier Communications
FYBR
| $5.48M | ﹤0.01% |
294,100
+71,300
| +32% | +$1.34M |
|
1258
CALL
Galicia Financial Group
GGAL
$7.92B
| $5.48M | ﹤0.01% |
318,600
-61,300
| -16% | -$799K |
|
1259
Nutrien
NTR
$32.7B
| $5.47M | ﹤0.01% |
+92,597
| New | +$5.89M |
|
|
SPLK
1260
DELISTED
Splunk Inc
SPLK
| $5.47M | ﹤0.01% |
51,538
+3,400
| +7% | +$323K |
|
1261
CALL
Academy Sports + Outdoors
ASO
$2.89B
| $5.45M | ﹤0.01% |
100,800
+22,300
| +28% | +$1.28M |
|
1262
CALL
Ralph Lauren
RL
$22.2B
| $5.44M | ﹤0.01% |
44,100
-17,200
| -28% | -$1.98M |
|
1263
CALL
BCE
BCE
$19.9B
| $5.43M | ﹤0.01% |
119,100
-40,700
| -25% | -$1.89M |
|
1264
CALL
Welltower
WELL
$178B
| $5.42M | ﹤0.01% |
67,000
+8,600
| +15% | +$663K |
|
1265
PUT
Dropbox
DBX
$6.84B
| $5.4M | ﹤0.01% |
202,600
-31,400
| -13% | -$716K |
|
1266
CALL
Huntsman Corp
HUN
$2.27B
| $5.4M | ﹤0.01% |
199,900
-44,400
| -18% | -$1.15M |
|
1267
CALL
Cenovus Energy
CVE
$54.8B
| $5.39M | ﹤0.01% |
317,700
-60,600
| -16% | -$1.02M |
|
1268
GSK
GSK
$103B
| $5.39M | ﹤0.01% |
151,279
-38,297
| -20% | -$1.37M |
|
1269
PUT
Planet Fitness
PLNT
$4.25B
| $5.39M | ﹤0.01% |
79,900
-37,300
| -32% | -$2.67M |
|
1270
PUT
CBRE Group
CBRE
$40.9B
| $5.36M | ﹤0.01% |
66,400
-29,300
| -31% | -$2.19M |
|
1271
CALL
Azenta
AZTA
$1.27B
| $5.34M | ﹤0.01% |
114,500
-12,600
| -10% | -$552K |
|
1272
CALL
Keysight
KEYS
$54B
| $5.34M | ﹤0.01% |
31,900
+3,200
| +11% | +$497K |
|
1273
Roblox
RBLX
$34.2B
| $5.34M | ﹤0.01% |
+132,460
| New | +$5.32M |
|
1274
CALL
FIVE9
FIVN
$1.79B
| $5.33M | ﹤0.01% |
64,700
+31,300
| +94% | +$2.1M |
|
1275
PUT
Asana
ASAN
$1.57B
| $5.32M | ﹤0.01% |
241,300
-278,300
| -54% | -$5.58M |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.