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 | |
|---|---|---|---|---|---|---|
776
CALL
Canadian Natural Resources
CNQ
$95.5B
| $11.9M | 0.01% |
387,700
-159,800
| -29% | -$4.84M |
|
777
PUT
Teck Resources
TECK
$28B
| $11.9M | 0.01% |
327,800
+119,500
| +57% | +$4.96M |
|
778
CALL
NetApp
NTAP
$32.6B
| $11.9M | 0.01% |
135,900
-43,500
| -24% | -$4.81M |
|
779
PUT
Trump Media & Technology Group
DJT
$2.56B
| $11.9M | 0.01% |
609,800
-951,800
| -61% | -$26.7M |
|
780
PUT
Bath & Body Works
BBWI
$4.04B
| $11.9M | 0.01% |
392,600
+58,400
| +17% | +$2.07M |
|
781
CALL
ArcelorMittal
MT
$50.1B
| $11.9M | 0.01% |
410,800
+31,500
| +8% | +$869K |
|
782
PUT
Astera Labs
ALAB
$56.7B
| $11.8M | 0.01% |
198,500
-180,800
| -48% | -$16.7M |
|
783
CALL
Blackrock
BLK
$164B
| $11.8M | 0.01% |
12,500
-35,700
| -74% | -$35M |
|
784
PUT
On Holding
ONON
$12.2B
| $11.8M | 0.01% |
268,000
-23,000
| -8% | -$1.21M |
|
785
PUT
AGNC Investment
AGNC
$12.5B
| $11.8M | 0.01% |
1,228,500
-475,200
| -28% | -$4.75M |
|
786
CALL
Lamb Weston
LW
$6.63B
| $11.8M | 0.01% |
220,700
-32,100
| -13% | -$1.82M |
|
|
FITB
787
CALL
Fifth Third Bancorp
FITB
$52.3B
| $11.7M | 0.01% |
298,800
+41,600
| +16% | +$1.75M |
|
788
CALL
NRG Energy
NRG
$29.5B
| $11.7M | 0.01% |
122,600
+3,700
| +3% | +$374K |
|
|
789
Alphabet (Google) Class C
GOOG
$4.17T
| $11.7M | 0.01% |
74,827
-15,351
| -17% | -$2.81M |
|
790
CALL
D-Wave Quantum
QBTS
$6.43B
| $11.7M | 0.01% |
1,537,700
+602,600
| +64% | +$4.05M |
|
791
PUT
Sempra
SRE
$60.8B
| $11.7M | 0.01% |
163,600
+146,800
| +874% | +$11.4M |
|
792
Warner Bros
WBD
$64.8B
| $11.7M | 0.01% |
1,086,804
-655,135
| -38% | -$6.85M |
|
793
PUT
Nice
NICE
$5.19B
| $11.6M | 0.01% |
75,500
+13,300
| +21% | +$2.13M |
|
794
CALL
Carpenter Technology
CRS
$29.2B
| $11.6M | 0.01% |
64,200
-5,600
| -8% | -$1.08M |
|
795
PUT
Hilton Worldwide
HLT
$73.8B
| $11.6M | 0.01% |
51,100
-15,000
| -23% | -$3.74M |
|
796
PUT
Dick's Sporting Goods
DKS
$18.8B
| $11.6M | 0.01% |
57,600
-239,700
| -81% | -$53.5M |
|
797
CALL
General Mills
GIS
$19.7B
| $11.6M | 0.01% |
193,900
-49,200
| -20% | -$2.96M |
|
798
PUT
Corning
GLW
$133B
| $11.6M | 0.01% |
252,800
-300
| -0.1% | -$14.8K |
|
799
Home Depot
HD
$330B
| $11.6M | 0.01% |
+31,546
| New | +$12.3M |
|
800
Pinduoduo
PDD
$119B
| $11.5M | 0.01% |
+97,380
| New | +$11.2M |
|
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.