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 |
NVIDIA
NVDA
|
+$172M |
| 2 |
Apple
AAPL
|
+$156M |
| 3 |
Broadcom
AVGO
|
+$101M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$57.2M |
| 5 |
UnitedHealth
UNH
|
+$55.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$140M |
| 2 |
Amazon
AMZN
|
+$47.9M |
| 3 |
Netflix
NFLX
|
+$38.3M |
| 4 |
TSMC
TSM
|
+$37.3M |
| 5 |
Pfizer
PFE
|
+$36.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.27% |
| 2 | Technology | 0.74% |
| 3 | Communication Services | 0.19% |
| 4 | Consumer Discretionary | 0.18% |
| 5 | Healthcare | 0.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1001
CALL
First Majestic Silver
AG
$10.3B
| $8.43M | ﹤0.01% |
1,019,400
+282,400
| +38% | +$1.9M |
|
1002
PUT
SBA Communications
SBAC
$20.1B
| $8.43M | ﹤0.01% |
35,900
+20,000
| +126% | +$4.58M |
|
1003
CALL
Chubb
CB
$132B
| $8.4M | ﹤0.01% |
29,000
-3,100
| -10% | -$892K |
|
1004
NextEra Energy
NEE
$174B
| $8.38M | ﹤0.01% |
120,670
+95,806
| +385% | +$6.65M |
|
1005
CALL
Diamondback Energy
FANG
$55.8B
| $8.37M | ﹤0.01% |
60,900
-6,000
| -9% | -$831K |
|
1006
PUT
Entergy
ETR
$51.3B
| $8.36M | ﹤0.01% |
100,600
-55,400
| -36% | -$4.58M |
|
1007
CALL
Becton Dickinson
BDX
$50.3B
| $8.32M | ﹤0.01% |
48,300
-82,600
| -63% | -$15.1M |
|
|
MPT
1008
CALL
Medical Properties Trust
MPT
$2.39B
| $8.31M | ﹤0.01% |
1,929,200
+505,500
| +36% | +$2.5M |
|
1009
CALL
KB Home
KBH
$3.2B
| $8.28M | ﹤0.01% |
156,300
+17,500
| +13% | +$931K |
|
1010
CALL
Tenet Healthcare
THC
$21.3B
| $8.27M | ﹤0.01% |
47,000
-42,900
| -48% | -$6.46M |
|
1011
CALL
Sable Offshore Corp
SOC
$909M
| $8.26M | ﹤0.01% |
375,900
-37,900
| -9% | -$882K |
|
1012
PUT
Ciena
CIEN
$45.5B
| $8.23M | ﹤0.01% |
101,200
-174,500
| -63% | -$12.5M |
|
1013
PUT
Ares Management
ARES
$31.6B
| $8.21M | ﹤0.01% |
47,400
-7,800
| -14% | -$1.23M |
|
1014
CALL
PureCycle Technologies
PCT
$1.28B
| $8.19M | ﹤0.01% |
597,900
+231,600
| +63% | +$2.05M |
|
1015
PUT
Campbell Soup
CPB
$6.38B
| $8.18M | ﹤0.01% |
266,900
+189,500
| +245% | +$6.67M |
|
1016
PUT
Monster Beverage
MNST
$85.8B
| $8.18M | ﹤0.01% |
261,200
+142,800
| +121% | +$4.36M |
|
1017
CALL
UBS Group
UBS
$170B
| $8.17M | ﹤0.01% |
241,700
+82,200
| +52% | +$2.54M |
|
1018
PUT
Bunge Global
BG
$22.8B
| $8.17M | ﹤0.01% |
101,800
+2,500
| +3% | +$197K |
|
1019
PUT
JetBlue
JBLU
$1.75B
| $8.15M | ﹤0.01% |
1,926,300
+633,200
| +49% | +$2.83M |
|
1020
PUT
Colgate-Palmolive
CL
$70.8B
| $8.13M | ﹤0.01% |
89,500
-194,800
| -69% | -$17.8M |
|
1021
CALL
Texas Pacific Land
TPL
$25B
| $8.13M | ﹤0.01% |
23,100
+4,200
| +22% | +$1.72M |
|
1022
CALL
KeyCorp
KEY
$23.7B
| $8.09M | ﹤0.01% |
464,400
+117,400
| +34% | +$1.82M |
|
1023
PUT
Valaris
VAL
$6.02B
| $8.09M | ﹤0.01% |
192,100
-59,100
| -24% | -$2.22M |
|
|
NNE
1024
CALL
Nano Nuclear Energy
NNE
$952M
| $8.09M | ﹤0.01% |
234,500
+17,400
| +8% | +$479K |
|
1025
CALL
Kratos Defense & Security Solutions
KTOS
$8.98B
| $8.06M | ﹤0.01% |
173,600
+88,500
| +104% | +$3.2M |
|
Similar funds
Simplex Trading's Q2 2025 Portfolio in Review
As of Q2 2025, Simplex Trading held 10,048 positions worth $175B, up 12% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q2 2025 filing shows 1,524 new, 3,308 increased, 3,590 reduced and 1,431 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 100,129 shares worth $61.9M. The largest sale was iShares 20+ Year Treasury Bond ETF, an estimated $140M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 99% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q2 2025 buy was State Street SPDR S&P 500 ETF Trust: 100,129 shares worth $61.9M.
- Simplex Trading added most to NVIDIA in Q2 2025, an estimated $172M increase.
- Simplex Trading's biggest Q2 2025 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $140M.
- Simplex Trading fully exited Constellation Energy in Q2 2025, selling an estimated $35.8M.
- Simplex Trading's ten largest holdings make up 47% of its $175B portfolio in Q2 2025.
- Simplex Trading opened 1,524 new positions and closed 1,431 in Q2 2025.
- Simplex Trading's portfolio value rose 12% quarter-over-quarter to $175B.
Based on Simplex Trading's 13F filing for Q2 2025, filed 5 Aug 2025.