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 | |
|---|---|---|---|---|---|---|
|
TEN
3051
CALL
Tsakos Energy Navigation Ltd
TEN
$1.17B
| $690K | ﹤0.01% |
40,500
-14,200
| -26% | -$247K |
|
3052
CALL
Eversource Energy
ES
$28.3B
| $689K | ﹤0.01% |
11,100
-1,700
| -13% | -$101K |
|
3053
PUT
Halozyme
HALO
$9.76B
| $689K | ﹤0.01% |
10,800
+400
| +4% | +$23.2K |
|
3054
CALL
Forward Air
FWRD
$490M
| $687K | ﹤0.01% |
34,200
-14,700
| -30% | -$405K |
|
3055
PUT
NextNav
NN
$1.71B
| $687K | ﹤0.01% |
56,500
-30,500
| -35% | -$368K |
|
3056
CALL
Intellia Therapeutics
NTLA
$1.53B
| $686K | ﹤0.01% |
96,500
-205,800
| -68% | -$2.08M |
|
3057
CALL
Sigma Lithium
SGML
$1.11B
| $686K | ﹤0.01% |
66,000
+2,800
| +4% | +$32.1K |
|
3058
CALL
Amer Sports
AS
$20.4B
| $686K | ﹤0.01% |
25,700
+2,700
| +12% | +$79.9K |
|
3059
CALL
Asbury Automotive
ABG
$4.24B
| $684K | ﹤0.01% |
3,100
-3,200
| -51% | -$835K |
|
3060
Genius Sports
GENI
$1.93B
| $683K | ﹤0.01% |
68,261
+23,223
| +52% | +$215K |
|
|
TDAY
3061
CALL
USA Today Co
TDAY
$1.26B
| $682K | ﹤0.01% |
236,000
+117,500
| +99% | +$491K |
|
3062
Appian
APPN
$1.88B
| $681K | ﹤0.01% |
23,652
+20,135
| +573% | +$659K |
|
|
FL
3063
DELISTED
Foot Locker
FL
| $681K | ﹤0.01% |
48,357
+47,540
| +5,819% | +$881K |
|
3064
PUT
Royalty Pharma
RPRX
$26.2B
| $681K | ﹤0.01% |
21,900
+14,200
| +184% | +$450K |
|
3065
Peloton Interactive
PTON
$2.65B
| $680K | ﹤0.01% |
107,677
-169,600
| -61% | -$1.33M |
|
3066
CALL
Helen of Troy
HELE
$665M
| $679K | ﹤0.01% |
12,700
-36,600
| -74% | -$2.11M |
|
3067
CALL
Ardmore Shipping
ASC
$671M
| $678K | ﹤0.01% |
69,300
+47,400
| +216% | +$518K |
|
|
RDUS
3068
CALL
DELISTED
Radius Recycling
RDUS
| $678K | ﹤0.01% |
23,500
+14,300
| +155% | +$230K |
|
|
CGC
3069
CALL
Canopy Growth
CGC
$385M
| $677K | ﹤0.01% |
744,100
-1,740,700
| -70% | -$3.06M |
|
|
3070
NextNav
NN
$1.71B
| $676K | ﹤0.01% |
55,551
-84,039
| -60% | -$1.01M |
|
3071
PUT
Brunswick
BC
$5.24B
| $673K | ﹤0.01% |
12,500
+12,300
| +6,150% | +$771K |
|
3072
PUT
Incyte
INCY
$23.9B
| $672K | ﹤0.01% |
11,100
+1,400
| +14% | +$97.6K |
|
3073
PUT
Red Cat Holdings
RCAT
$1.17B
| $672K | ﹤0.01% |
114,300
-54,400
| -32% | -$436K |
|
3074
PUT
Celldex Therapeutics
CLDX
$2.79B
| $671K | ﹤0.01% |
37,000
+21,200
| +134% | +$474K |
|
3075
CALL
Wave Life Sciences
WVE
$1.14B
| $671K | ﹤0.01% |
83,100
+5,000
| +6% | +$54.7K |
|
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.