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 | |
|---|---|---|---|---|---|---|
2801
PUT
FT Vest Gold Strategy Target Income ETF
IGLD
$507M
| $897K | ﹤0.01% |
4,400
+500
| +13% | +$9.89K |
|
2802
PUT
NETGEAR
NTGR
$669M
| $897K | ﹤0.01% |
36,700
+8,200
| +29% | +$216K |
|
2803
ProShares UltraShort Bloomberg Natural Gas
KOLD
$110M
| $896K | ﹤0.01% |
45,788
+5,456
| +14% | +$151K |
|
2804
CALL
Acuity Brands
AYI
$9.88B
| $895K | ﹤0.01% |
3,400
-1,200
| -26% | -$363K |
|
2805
PUT
Teekay Tankers
TNK
$2.63B
| $895K | ﹤0.01% |
23,400
+22,800
| +3,800% | +$923K |
|
2806
CALL
PVH
PVH
$3.71B
| $892K | ﹤0.01% |
13,800
-3,100
| -18% | -$250K |
|
2807
Quest Diagnostics
DGX
$25.1B
| $889K | ﹤0.01% |
5,259
+4,171
| +383% | +$685K |
|
2808
CALL
Opendoor
OPEN
$3.69B
| $889K | ﹤0.01% |
901,067
-821,396
| -48% | -$1.08M |
|
|
RVPH
2809
CALL
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $889K | ﹤0.01% |
46,630
+26,465
| +131% | +$832K |
|
2810
PUT
Texas Capital Bancshares
TCBI
$4.31B
| $888K | ﹤0.01% |
+11,900
| New | +$925K |
|
2811
PUT
Viatris
VTRS
$20.1B
| $888K | ﹤0.01% |
102,000
-120,500
| -54% | -$1.27M |
|
2812
PUT
Burford Capital
BUR
$907M
| $887K | ﹤0.01% |
67,200
+40,400
| +151% | +$567K |
|
2813
CALL
Copa Holdings
CPA
$5.56B
| $887K | ﹤0.01% |
9,600
+2,500
| +35% | +$232K |
|
2814
PUT
Petco
WOOF
$745M
| $886K | ﹤0.01% |
290,600
+60,600
| +26% | +$190K |
|
2815
CALL
Fidelity National Financial
FNF
$13.9B
| $885K | ﹤0.01% |
13,600
+3,500
| +35% | +$210K |
|
2816
PUT
Acadia Healthcare
ACHC
$3.17B
| $882K | ﹤0.01% |
29,100
+2,000
| +7% | +$76.2K |
|
2817
Ingredion
INGR
$6.38B
| $882K | ﹤0.01% |
6,530
-862
| -12% | -$114K |
|
2818
Quantum Computing Inc
QUBT
$1.68B
| $882K | ﹤0.01% |
110,256
+78,448
| +247% | +$690K |
|
2819
PUT
nVent Electric
NVT
$24.5B
| $880K | ﹤0.01% |
16,800
+14,600
| +664% | +$923K |
|
2820
Hershey
HSY
$35.4B
| $879K | ﹤0.01% |
5,145
-84,573
| -94% | -$13.8M |
|
|
CRON
2821
CALL
Cronos Group
CRON
$1.05B
| $878K | ﹤0.01% |
485,400
-181,300
| -27% | -$351K |
|
2822
PUT
Edgewise Therapeutics
EWTX
$4.39B
| $877K | ﹤0.01% |
39,900
-46,800
| -54% | -$1.23M |
|
2823
CALL
Array Technologies
ARRY
$818M
| $876K | ﹤0.01% |
180,000
-20,300
| -10% | -$131K |
|
|
STR
2824
CALL
DELISTED
Sitio Royalties
STR
| $876K | ﹤0.01% |
44,100
+2,200
| +5% | +$44.5K |
|
2825
CALL
Redwire
RDW
$2.08B
| $875K | ﹤0.01% |
105,600
+41,200
| +64% | +$682K |
|
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.