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 | |
|---|---|---|---|---|---|---|
1226
PUT
GE HealthCare
GEHC
$27.7B
| $5.72M | ﹤0.01% |
70,400
+60,900
| +641% | +$4.86M |
|
|
LAZR
1227
PUT
DELISTED
Luminar Technologies
LAZR
| $5.71M | ﹤0.01% |
55,387
+12,080
| +28% | +$1.14M |
|
1228
Bristol-Myers Squibb
BMY
$127B
| $5.71M | ﹤0.01% |
+89,359
| New | +$5.99M |
|
1229
PUT
Option Care Health
OPCH
$3.37B
| $5.71M | ﹤0.01% |
+175,800
| New | +$5.3M |
|
1230
PUT
Diageo
DEO
$46.2B
| $5.71M | ﹤0.01% |
32,900
+4,200
| +15% | +$750K |
|
1231
CALL
Cencora
COR
$60B
| $5.7M | ﹤0.01% |
29,600
+8,000
| +37% | +$1.38M |
|
|
DISH
1232
PUT
DELISTED
DISH Network Corp.
DISH
| $5.69M | ﹤0.01% |
864,000
-586,000
| -40% | -$4.15M |
|
1233
PUT
NXP Semiconductors
NXPI
$68.1B
| $5.67M | ﹤0.01% |
27,700
-73,500
| -73% | -$13.1M |
|
1234
CALL
Teva Pharmaceuticals
TEVA
$36B
| $5.66M | ﹤0.01% |
751,500
+235,800
| +46% | +$1.91M |
|
1235
CALL
Aptiv
APTV
$12B
| $5.66M | ﹤0.01% |
55,400
+23,000
| +71% | +$2.27M |
|
1236
CALL
Bio-Rad Laboratories Class A
BIO
$8.46B
| $5.65M | ﹤0.01% |
14,900
+11,200
| +303% | +$4.56M |
|
1237
PUT
Becton Dickinson
BDX
$42.9B
| $5.62M | ﹤0.01% |
21,300
-14,300
| -40% | -$3.63M |
|
1238
CALL
Gen Digital
GEN
$15.6B
| $5.6M | ﹤0.01% |
301,900
+58,500
| +24% | +$1.02M |
|
1239
PUT
Lamb Weston
LW
$6.69B
| $5.6M | ﹤0.01% |
48,700
+34,000
| +231% | +$3.79M |
|
1240
PUT
Kimberly-Clark
KMB
$36B
| $5.59M | ﹤0.01% |
40,500
-16,800
| -29% | -$2.34M |
|
1241
PUT
Darling Ingredients
DAR
$9.93B
| $5.59M | ﹤0.01% |
87,600
+26,500
| +43% | +$1.61M |
|
1242
PUT
Philips
PHG
$25.5B
| $5.58M | ﹤0.01% |
287,870
+142,236
| +98% | +$2.49M |
|
1243
CALL
Quest Diagnostics
DGX
$25.1B
| $5.58M | ﹤0.01% |
39,700
+9,000
| +29% | +$1.24M |
|
1244
CALL
Freshpet
FRPT
$2.82B
| $5.57M | ﹤0.01% |
84,700
-72,900
| -46% | -$4.77M |
|
1245
General Dynamics
GD
$104B
| $5.56M | ﹤0.01% |
25,856
-59,606
| -70% | -$12.9M |
|
1246
CALL
Duolingo
DUOL
$5.67B
| $5.56M | ﹤0.01% |
38,900
+24,500
| +170% | +$3.51M |
|
1247
PUT
Lincoln National
LNC
$7.84B
| $5.54M | ﹤0.01% |
215,000
-42,400
| -16% | -$931K |
|
1248
Union Pacific
UNP
$183B
| $5.53M | ﹤0.01% |
27,006
-62,389
| -70% | -$12.4M |
|
1249
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $5.52M | ﹤0.01% |
140,900
+48,500
| +52% | +$1.7M |
|
1250
PUT
Enterprise Products Partners
EPD
$83.9B
| $5.52M | ﹤0.01% |
209,600
-12,900
| -6% | -$337K |
|
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.