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 | Miscellaneous | 98.56% |
| 2 | Technology | 0.41% |
| 3 | Consumer Discretionary | 0.22% |
| 4 | Healthcare | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
801
Bristol-Myers Squibb
BMY
$136B
| $11.5M | 0.01% |
188,899
-147,729
| -44% | -$8.61M |
|
802
Blackstone
BX
$102B
| $11.5M | 0.01% |
+82,337
| New | +$13.4M |
|
803
CALL
IonQ
IONQ
$16B
| $11.5M | 0.01% |
521,200
-4,900
| -0.9% | -$159K |
|
804
CALL
Aflac
AFL
$58.8B
| $11.5M | 0.01% |
103,300
-45,500
| -31% | -$4.83M |
|
805
CALL
Enbridge
ENB
$109B
| $11.5M | 0.01% |
259,100
+125,700
| +94% | +$5.47M |
|
806
CALL
Shift4
FOUR
$3.63B
| $11.5M | 0.01% |
140,500
+88,600
| +171% | +$9.13M |
|
807
PUT
Hewlett Packard
HPE
$69B
| $11.5M | 0.01% |
743,200
+426,800
| +135% | +$8.5M |
|
808
KE Holdings
BEKE
$19.8B
| $11.5M | 0.01% |
570,560
+479,153
| +524% | +$9.49M |
|
809
CALL
Deutsche Bank
DB
$77.7B
| $11.4M | 0.01% |
479,600
+295,500
| +161% | +$6.2M |
|
810
PUT
Automatic Data Processing
ADP
$110B
| $11.4M | 0.01% |
37,400
-10,800
| -22% | -$3.26M |
|
811
CALL
MetLife
MET
$62B
| $11.4M | 0.01% |
142,100
-92,700
| -39% | -$7.71M |
|
812
CALL
ProShares Ether Strategy ETF
EETH
$68.2M
| $11.4M | 0.01% |
324,900
-260,300
| -44% | -$13.1M |
|
813
CALL
T. Rowe Price
TROW
$23.4B
| $11.3M | 0.01% |
123,300
+40,400
| +49% | +$4.27M |
|
814
CALL
LyondellBasell Industries
LYB
$20.5B
| $11.3M | 0.01% |
160,800
-137,100
| -46% | -$10.3M |
|
815
PUT
Southern Company
SO
$101B
| $11.3M | 0.01% |
123,000
-55,200
| -31% | -$4.78M |
|
816
PUT
NXP Semiconductors
NXPI
$57.5B
| $11.3M | 0.01% |
59,500
-16,800
| -22% | -$3.58M |
|
817
CALL
L3Harris
LHX
$47.8B
| $11.3M | 0.01% |
54,000
+39,200
| +265% | +$8.22M |
|
818
Carvana
CVNA
$53.7B
| $11.3M | 0.01% |
269,275
+58,810
| +28% | +$2.6M |
|
819
CALL
SAP
SAP
$248B
| $11.2M | 0.01% |
41,900
-4,500
| -10% | -$1.23M |
|
820
PUT
ZIM Integrated Shipping Services
ZIM
$3.44B
| $11.2M | 0.01% |
770,800
+88,500
| +13% | +$1.66M |
|
821
PUT
Archer Daniels Midland
ADM
$40.8B
| $11.2M | 0.01% |
234,200
+114,300
| +95% | +$5.53M |
|
822
PUT
Skyworks Solutions
SWKS
$11.1B
| $11.2M | 0.01% |
173,800
+11,900
| +7% | +$906K |
|
|
DOCU
823
CALL
DocuSign
DOCU
$13.1B
| $11.2M | 0.01% |
137,900
-191,300
| -58% | -$16.8M |
|
824
PUT
Teva Pharmaceuticals
TEVA
$42.4B
| $11.2M | 0.01% |
729,300
-153,200
| -17% | -$2.74M |
|
825
CALL
Toyota
TM
$233B
| $11.2M | 0.01% |
63,500
-19,800
| -24% | -$3.68M |
|
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's Q1 2025 filing shows 1,566 new, 3,139 increased, 3,654 reduced and 1,547 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M. The largest sale was Apple, an estimated $518M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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.