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 | |
|---|---|---|---|---|---|---|
751
CALL
e.l.f. Beauty
ELF
$4.66B
| $12.5M | 0.01% |
199,100
+32,400
| +19% | +$2.82M |
|
752
SoFi Technologies
SOFI
$21.9B
| $12.5M | 0.01% |
1,074,410
+515,627
| +92% | +$7.43M |
|
753
CALL
Prologis
PLD
$135B
| $12.5M | 0.01% |
111,500
-400
| -0.4% | -$46.3K |
|
754
PUT
The GEO Group
GEO
$4.19B
| $12.5M | 0.01% |
426,500
-57,000
| -12% | -$1.63M |
|
755
PUT
Paychex
PAYX
$39.4B
| $12.4M | 0.01% |
80,700
+13,100
| +19% | +$1.93M |
|
756
CALL
Planet Fitness
PLNT
$4.28B
| $12.4M | 0.01% |
128,700
+110,200
| +596% | +$11.1M |
|
757
PUT
Ulta Beauty
ULTA
$20.8B
| $12.4M | 0.01% |
33,900
-114,400
| -77% | -$43.6M |
|
758
CALL
Global Payments
GPN
$21.6B
| $12.4M | 0.01% |
126,200
+30,700
| +32% | +$3.21M |
|
759
PUT
Constellation Brands
STZ
$22.6B
| $12.3M | 0.01% |
66,900
-13,800
| -17% | -$2.51M |
|
760
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $12.3M | 0.01% |
290,700
-67,700
| -19% | -$1.53M |
|
761
Ford
F
$57.5B
| $12.3M | 0.01% |
1,223,600
+367,517
| +43% | +$3.59M |
|
762
CALL
Wynn Resorts
WYNN
$9.79B
| $12.2M | 0.01% |
146,500
-167,900
| -53% | -$14.3M |
|
763
PUT
D.R. Horton
DHI
$40B
| $12.2M | 0.01% |
96,100
-56,000
| -37% | -$7.51M |
|
764
Walt Disney
DIS
$166B
| $12.2M | 0.01% |
123,121
+46,086
| +60% | +$4.95M |
|
765
PUT
YPF
YPF
$20.6B
| $12.1M | 0.01% |
345,600
+12,600
| +4% | +$482K |
|
766
CALL
Tenet Healthcare
THC
$16.8B
| $12.1M | 0.01% |
89,900
+25,000
| +39% | +$3.29M |
|
767
DoorDash
DASH
$77.4B
| $12.1M | 0.01% |
+65,971
| New | +$12.4M |
|
768
PUT
Progressive
PGR
$119B
| $12.1M | 0.01% |
42,600
+25,600
| +151% | +$6.7M |
|
769
CALL
Rigetti Computing
RGTI
$5.06B
| $12M | 0.01% |
1,518,800
-69,500
| -4% | -$771K |
|
770
CALL
Archer Aviation
ACHR
$3.95B
| $12M | 0.01% |
1,690,600
+177,000
| +12% | +$1.57M |
|
771
CALL
BCE
BCE
$20B
| $12M | 0.01% |
523,200
+37,800
| +8% | +$889K |
|
772
PUT
Teradyne
TER
$57.8B
| $12M | 0.01% |
145,200
+12,300
| +9% | +$1.38M |
|
773
PUT
Electronic Arts
EA
$52.4B
| $12M | 0.01% |
175,800
+63,900
| +57% | +$8.63M |
|
|
TLN
774
CALL
Talen Energy Corp
TLN
$18B
| $12M | 0.01% |
60,000
-55,600
| -48% | -$12.1M |
|
775
CALL
Biogen
BIIB
$29.2B
| $12M | 0.01% |
87,500
+17,800
| +26% | +$2.54M |
|
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.