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 | |
|---|---|---|---|---|---|---|
1401
CALL
Enbridge
ENB
$124B
| $4.45M | ﹤0.01% |
119,700
-108,000
| -47% | -$4.12M |
|
1402
STMicroelectronics
STM
$46B
| $4.43M | ﹤0.01% |
88,723
-5,569
| -6% | -$258K |
|
1403
CALL
Leonardo DRS
DRS
$12.8B
| $4.43M | ﹤0.01% |
255,700
+20,300
| +9% | +$314K |
|
1404
Caesars Entertainment
CZR
$6.1B
| $4.4M | ﹤0.01% |
+86,348
| New | +$3.92M |
|
1405
CALL
Centene
CNC
$31.3B
| $4.4M | ﹤0.01% |
65,200
-51,500
| -44% | -$3.43M |
|
1406
CALL
Amylyx Pharmaceuticals
AMLX
$2.05B
| $4.37M | ﹤0.01% |
202,800
+13,500
| +7% | +$365K |
|
1407
CALL
Yum! Brands
YUM
$41B
| $4.36M | ﹤0.01% |
31,500
-22,600
| -42% | -$3.06M |
|
1408
PUT
Autoliv
ALV
$8.6B
| $4.35M | ﹤0.01% |
51,200
+35,900
| +235% | +$3.11M |
|
1409
CALL
Alnylam Pharmaceuticals
ALNY
$36.3B
| $4.35M | ﹤0.01% |
22,900
-13,900
| -38% | -$2.76M |
|
|
GTM
1410
CALL
ZoomInfo Technologies
GTM
$861M
| $4.35M | ﹤0.01% |
171,300
+42,100
| +33% | +$997K |
|
1411
CALL
TC Energy
TRP
$73.5B
| $4.34M | ﹤0.01% |
107,500
-23,800
| -18% | -$972K |
|
1412
PBF Energy
PBF
$7.29B
| $4.34M | ﹤0.01% |
106,059
+92,015
| +655% | +$3.5M |
|
1413
PUT
Allstate
ALL
$66.9B
| $4.34M | ﹤0.01% |
39,800
+2,600
| +7% | +$295K |
|
1414
PUT
Canadian Pacific Kansas City
CP
$82B
| $4.34M | ﹤0.01% |
53,700
-46,300
| -46% | -$3.66M |
|
1415
PUT
Middleby
MIDD
$6.05B
| $4.33M | ﹤0.01% |
29,300
+21,000
| +253% | +$2.96M |
|
|
MRTX
1416
CALL
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $4.32M | ﹤0.01% |
119,700
+97,400
| +437% | +$4.01M |
|
1417
PUT
Bloom Energy
BE
$52.6B
| $4.32M | ﹤0.01% |
264,400
-186,100
| -41% | -$3.01M |
|
1418
Lam Research
LRCX
$382B
| $4.32M | ﹤0.01% |
+67,200
| New | +$3.79M |
|
1419
CALL
New Oriental
EDU
$7.84B
| $4.31M | ﹤0.01% |
109,200
+85,000
| +351% | +$3.4M |
|
1420
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $4.31M | ﹤0.01% |
9,000
-1,200
| -12% | -$546K |
|
1421
CALL
Alamos Gold
AGI
$12.4B
| $4.31M | ﹤0.01% |
361,400
+117,500
| +48% | +$1.49M |
|
1422
CALL
QuantumScape Corp
QS
$3B
| $4.3M | ﹤0.01% |
538,800
-625,000
| -54% | -$4.35M |
|
1423
PUT
Ovintiv
OVV
$17.7B
| $4.3M | ﹤0.01% |
112,900
-154,200
| -58% | -$5.57M |
|
|
JPGE
1424
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $4.29M | ﹤0.01% |
77,800
-1,100
| -1% | -$60.7K |
|
1425
PUT
Sinclair Inc
SBGI
$974M
| $4.29M | ﹤0.01% |
310,300
+309,500
| +38,688% | +$5.11M |
|
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.