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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1601
PUT
AdaptHealth
AHCO
$1.46B
| $3.22M | ﹤0.01% |
297,400
+39,000
| +15% | +$392K |
|
1602
CALL
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $3.22M | ﹤0.01% |
42,700
-300
| -0.7% | -$17.5K |
|
1603
CALL
SharkNinja
SN
$21B
| $3.2M | ﹤0.01% |
38,400
+6,100
| +19% | +$621K |
|
1604
PUT
Barclays
BCS
$94.1B
| $3.19M | ﹤0.01% |
207,600
-25,200
| -11% | -$377K |
|
1605
PUT
Under Armour Class C
UA
$2.92B
| $3.18M | ﹤0.01% |
509,500
+283,200
| +125% | +$1.93M |
|
1606
PUT
OneMain Financial
OMF
$6.9B
| $3.18M | ﹤0.01% |
65,100
+25,200
| +63% | +$1.34M |
|
1607
CALL
Annaly Capital Management
NLY
$16.9B
| $3.18M | ﹤0.01% |
156,600
+31,700
| +25% | +$652K |
|
1608
PUT
BWX Technologies
BWXT
$16B
| $3.18M | ﹤0.01% |
32,200
+14,400
| +81% | +$1.56M |
|
1609
Capri Holdings
CPRI
$1.77B
| $3.18M | ﹤0.01% |
+161,008
| New | +$3.57M |
|
1610
CALL
PBF Energy
PBF
$7.29B
| $3.17M | ﹤0.01% |
166,300
-137,800
| -45% | -$3.43M |
|
1611
CALL
BioMarin Pharmaceuticals
BMRN
$11.5B
| $3.17M | ﹤0.01% |
44,900
+20,700
| +86% | +$1.39M |
|
1612
PUT
Omega Healthcare
OHI
$15.4B
| $3.17M | ﹤0.01% |
83,300
+19,400
| +30% | +$722K |
|
|
CMA
1613
CALL
DELISTED
Comerica
CMA
| $3.17M | ﹤0.01% |
53,700
-51,200
| -49% | -$3.22M |
|
1614
CALL
Asana
ASAN
$1.58B
| $3.17M | ﹤0.01% |
217,500
-62,300
| -22% | -$1.18M |
|
1615
PUT
Bausch Health
BHC
$1.65B
| $3.17M | ﹤0.01% |
489,600
-404,400
| -45% | -$2.91M |
|
1616
CALL
Qorvo
QRVO
$7.63B
| $3.16M | ﹤0.01% |
43,700
-63,200
| -59% | -$4.81M |
|
1617
CALL
Brown-Forman Class B
BF.B
$12B
| $3.16M | ﹤0.01% |
93,200
+40,200
| +76% | +$1.36M |
|
|
AKRO
1618
PUT
DELISTED
Akero Therapeutics
AKRO
| $3.15M | ﹤0.01% |
77,800
+12,000
| +18% | +$509K |
|
1619
PUT
RUM Group Inc
RUM
$1.57B
| $3.14M | ﹤0.01% |
444,800
-195,400
| -31% | -$2.04M |
|
1620
CALL
Bank OZK
OZK
$5.49B
| $3.14M | ﹤0.01% |
72,300
-5,300
| -7% | -$251K |
|
1621
PUT
StoneCo
STNE
$2.62B
| $3.14M | ﹤0.01% |
299,800
+155,300
| +107% | +$1.46M |
|
1622
CALL
Dropbox
DBX
$6.81B
| $3.13M | ﹤0.01% |
117,400
-5,800
| -5% | -$169K |
|
1623
PUT
Summit Therapeutics
SMMT
$10.6B
| $3.13M | ﹤0.01% |
162,100
-60,200
| -27% | -$1.21M |
|
1624
CALL
Ares Capital
ARCC
$13.5B
| $3.12M | ﹤0.01% |
140,600
+1,300
| +0.9% | +$29.5K |
|
1625
PUT
Maplebear
CART
$9.92B
| $3.12M | ﹤0.01% |
78,100
-78,400
| -50% | -$3.48M |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.