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 | |
|---|---|---|---|---|---|---|
2326
CALL
Chord Energy
CHRD
$7.79B
| $1.49M | ﹤0.01% |
13,200
-6,600
| -33% | -$750K |
|
2327
CALL
Portillo's
PTLO
$315M
| $1.49M | ﹤0.01% |
125,000
+85,400
| +216% | +$1.11M |
|
2328
PUT
Equifax
EFX
$20.3B
| $1.49M | ﹤0.01% |
6,100
+2,300
| +61% | +$578K |
|
2329
PUT
XP
XP
$8.62B
| $1.49M | ﹤0.01% |
108,000
+93,500
| +645% | +$1.29M |
|
2330
Darling Ingredients
DAR
$9.93B
| $1.48M | ﹤0.01% |
47,270
-3,148
| -6% | -$110K |
|
2331
CALL
Gen Digital
GEN
$15.6B
| $1.48M | ﹤0.01% |
55,600
-113,400
| -67% | -$3.11M |
|
2332
PUT
Sturm, Ruger & Co
RGR
$610M
| $1.47M | ﹤0.01% |
37,500
+36,500
| +3,650% | +$1.37M |
|
2333
CALL
Allegiant Air
ALGT
$2.64B
| $1.47M | ﹤0.01% |
28,500
+16,300
| +134% | +$1.31M |
|
2334
CALL
Liberty Energy
LBRT
$2.83B
| $1.47M | ﹤0.01% |
93,000
+62,500
| +205% | +$1.12M |
|
2335
PUT
H&R Block
HRB
$5.18B
| $1.47M | ﹤0.01% |
26,800
-18,100
| -40% | -$968K |
|
2336
CALL
iQIYI
IQ
$1.18B
| $1.47M | ﹤0.01% |
650,300
-670,000
| -51% | -$1.47M |
|
2337
CALL
Full Truck Alliance
YMM
$9.56B
| $1.46M | ﹤0.01% |
114,600
+9,800
| +9% | +$118K |
|
2338
CALL
ING
ING
$93.8B
| $1.46M | ﹤0.01% |
74,600
+54,400
| +269% | +$966K |
|
|
SGI
2339
CALL
Somnigroup International
SGI
$15.1B
| $1.46M | ﹤0.01% |
24,400
-30,700
| -56% | -$1.86M |
|
2340
CALL
Academy Sports + Outdoors
ASO
$2.89B
| $1.46M | ﹤0.01% |
32,000
-45,600
| -59% | -$2.34M |
|
2341
CALL
Banc of California
BANC
$3.28B
| $1.46M | ﹤0.01% |
102,800
+47,300
| +85% | +$716K |
|
2342
CALL
Travere Therapeutics
TVTX
$5.33B
| $1.46M | ﹤0.01% |
81,400
+30,800
| +61% | +$625K |
|
2343
Wingstop
WING
$3.68B
| $1.46M | ﹤0.01% |
+6,457
| New | +$1.68M |
|
2344
CALL
nCino
NCNO
$1.81B
| $1.46M | ﹤0.01% |
53,000
-17,500
| -25% | -$554K |
|
2345
PUT
Old Dominion Freight Line
ODFL
$48.5B
| $1.46M | ﹤0.01% |
8,800
-6,400
| -42% | -$1.16M |
|
2346
Kodak
KODK
$806M
| $1.45M | ﹤0.01% |
230,148
-119,232
| -34% | -$828K |
|
|
PPLC
2347
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $1.45M | ﹤0.01% |
48,000
-15,700
| -25% | -$476K |
|
2348
PUT
Ultragenyx Pharmaceutical
RARE
$2.65B
| $1.45M | ﹤0.01% |
40,000
+26,300
| +192% | +$1.09M |
|
2349
Applied Digital
APLD
$7.77B
| $1.45M | ﹤0.01% |
+257,587
| New | +$2.02M |
|
2350
Energy Fuels
UUUU
$2.82B
| $1.44M | ﹤0.01% |
387,239
+216,320
| +127% | +$1.04M |
|
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.