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 | Technology | 0.74% |
| 2 | Communication Services | 0.19% |
| 3 | Consumer Discretionary | 0.18% |
| 4 | Healthcare | 0.17% |
| 5 | Financials | 0.14% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1601
CALL
Hasbro
HAS
$12.6B
| $3.7M | ﹤0.01% |
50,100
-42,000
| -46% | -$2.65M |
|
1602
CALL
Fastenal
FAST
$54B
| $3.69M | ﹤0.01% |
87,900
-37,300
| -30% | -$1.51M |
|
|
BABO
1603
PUT
YieldMax BABA Option Income Strategy ETF
BABO
$13.7M
| $3.69M | ﹤0.01% |
100,400
+9,300
| +10% | +$154K |
|
1604
CALL
BorgWarner
BWA
$13.2B
| $3.67M | ﹤0.01% |
109,600
+47,900
| +78% | +$1.47M |
|
1605
CALL
FMC
FMC
$1.42B
| $3.67M | ﹤0.01% |
87,900
-24,900
| -22% | -$989K |
|
1606
PUT
Sibanye-Stillwater
SBSW
$5.92B
| $3.66M | ﹤0.01% |
507,100
+105,400
| +26% | +$576K |
|
1607
PUT
SL Green Realty
SLG
$3.88B
| $3.65M | ﹤0.01% |
58,900
-9,600
| -14% | -$550K |
|
1608
PUT
WIX.com
WIX
$2.15B
| $3.64M | ﹤0.01% |
23,000
+7,100
| +45% | +$1.14M |
|
1609
PUT
Ramaco Resources Class A
METC
$676M
| $3.64M | ﹤0.01% |
277,300
+272,153
| +5,288% | +$2.6M |
|
1610
PUT
Illumina
ILMN
$29.4B
| $3.63M | ﹤0.01% |
39,500
-10,800
| -21% | -$877K |
|
1611
PUT
OneMain Financial
OMF
$6.9B
| $3.63M | ﹤0.01% |
63,700
-1,400
| -2% | -$69.8K |
|
1612
CALL
Ares Capital
ARCC
$13.5B
| $3.62M | ﹤0.01% |
164,700
+24,100
| +17% | +$513K |
|
1613
Curtiss-Wright
CW
$27.7B
| $3.62M | ﹤0.01% |
+7,403
| New | +$2.92M |
|
1614
CALL
VICI Properties
VICI
$29.4B
| $3.62M | ﹤0.01% |
110,900
-20,500
| -16% | -$652K |
|
1615
PUT
Amplify Online Retail ETF
IBUY
$106M
| $3.61M | ﹤0.01% |
185,800
-5,600
| -3% | -$358K |
|
1616
CALL
Pagaya Technologies
PGY
$1.32B
| $3.61M | ﹤0.01% |
169,500
-36,500
| -18% | -$519K |
|
1617
PUT
Carlyle Group
CG
$16.3B
| $3.61M | ﹤0.01% |
70,200
+64,800
| +1,200% | +$2.79M |
|
1618
PUT
NextDecade
NEXT
$1.85B
| $3.61M | ﹤0.01% |
404,900
-99,400
| -20% | -$771K |
|
1619
PUT
Match Group
MTCH
$8.84B
| $3.6M | ﹤0.01% |
116,600
-93,800
| -45% | -$2.81M |
|
|
SAND
1620
CALL
DELISTED
Sandstorm Gold
SAND
| $3.6M | ﹤0.01% |
383,100
+194,600
| +103% | +$1.67M |
|
1621
CALL
Yum! Brands
YUM
$41B
| $3.6M | ﹤0.01% |
24,300
-12,300
| -34% | -$1.8M |
|
1622
CALL
Intuitive Machines
LUNR
$2.07B
| $3.6M | ﹤0.01% |
331,100
-148,900
| -31% | -$1.46M |
|
1623
PUT
Life Time Group Holdings
LTH
$9.42B
| $3.59M | ﹤0.01% |
118,500
+5,100
| +4% | +$151K |
|
1624
PUT
Royal Gold
RGLD
$17.1B
| $3.59M | ﹤0.01% |
20,200
+10,000
| +98% | +$1.77M |
|
1625
PUT
SentinelOne
S
$6.22B
| $3.59M | ﹤0.01% |
196,500
-5,000
| -2% | -$91.5K |
|
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 withdrew a net $10.5B in Q2 2025, closing 1,431 positions and reducing 3,590 holdings. Its most notable exit was Constellation Energy, an estimated $35.8M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.74% of assets, up from 0.41% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in State Street SPDR S&P 500 ETF Trust worth $61.9M.
- 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 1,525 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.