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 | |
|---|---|---|---|---|---|---|
2676
PUT
M&T Bank
MTB
$36.2B
| $1.04M | ﹤0.01% |
5,800
-13,600
| -70% | -$2.58M |
|
2677
Birkenstock
BIRK
$7.47B
| $1.03M | ﹤0.01% |
22,530
+12,396
| +122% | +$653K |
|
2678
CALL
Rayonier
RYN
$6.49B
| $1.03M | ﹤0.01% |
38,806
+23,388
| +152% | +$592K |
|
|
QLTB
2679
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $1.03M | ﹤0.01% |
5,700
+3,600
| +171% | +$651K |
|
2680
PUT
Ecopetrol
EC
$32.9B
| $1.03M | ﹤0.01% |
98,700
-1,900
| -2% | -$18.1K |
|
|
KEEL
2681
CALL
Keel Infrastructure Corp
KEEL
$2.57B
| $1.03M | ﹤0.01% |
1,303,800
-851,400
| -40% | -$1.13M |
|
2682
Sprott Uranium Miners ETF
URNM
$1.78B
| $1.03M | ﹤0.01% |
31,633
+24,627
| +352% | +$936K |
|
2683
CALL
Remitly
RELY
$4.74B
| $1.02M | ﹤0.01% |
49,300
+4,100
| +9% | +$94K |
|
2684
PUT
FLEX LNG
FLNG
$1.67B
| $1.02M | ﹤0.01% |
44,500
+22,100
| +99% | +$528K |
|
2685
PUT
Kinsale Capital Group
KNSL
$7.95B
| $1.02M | ﹤0.01% |
2,100
+1,000
| +91% | +$449K |
|
2686
PUT
Molina Healthcare
MOH
$10.3B
| $1.02M | ﹤0.01% |
3,100
-1,200
| -28% | -$362K |
|
2687
CALL
Omega Healthcare
OHI
$15.4B
| $1.02M | ﹤0.01% |
26,800
-32,300
| -55% | -$1.2M |
|
|
HOLX
2688
PUT
DELISTED
Hologic
HOLX
| $1.02M | ﹤0.01% |
16,500
-12,200
| -43% | -$808K |
|
2689
PUT
Textron
TXT
$16.6B
| $1.02M | ﹤0.01% |
14,100
+13,300
| +1,663% | +$995K |
|
2690
PUT
MSCI
MSCI
$40B
| $1.02M | ﹤0.01% |
1,800
-14,300
| -89% | -$8.31M |
|
2691
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$144B
| $1.02M | ﹤0.01% |
74,600
+65,600
| +729% | +$816K |
|
|
ONT
2692
CALL
Onterris Inc
ONT
$710M
| $1.02M | ﹤0.01% |
71,300
+69,300
| +3,465% | +$1.32M |
|
|
ONT
2693
PUT
Onterris Inc
ONT
$710M
| $1.02M | ﹤0.01% |
71,300
+56,200
| +372% | +$1.07M |
|
2694
Cal-Maine
CALM
$4.28B
| $1.01M | ﹤0.01% |
11,169
-1,260
| -10% | -$124K |
|
2695
Genesis Energy
GEL
$1.84B
| $1.01M | ﹤0.01% |
64,740
-18,663
| -22% | -$227K |
|
2696
CALL
Life Time Group Holdings
LTH
$9.42B
| $1.01M | ﹤0.01% |
33,600
+14,800
| +79% | +$435K |
|
2697
PUT
Community Health Systems
CYH
$385M
| $1.01M | ﹤0.01% |
375,400
+54,900
| +17% | +$171K |
|
2698
PUT
ImmunityBio
IBRX
$7.44B
| $1.01M | ﹤0.01% |
336,300
+100,300
| +43% | +$304K |
|
|
DENT
2699
PUT
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $1.01M | ﹤0.01% |
348,500
-700,500
| -67% | -$2.03M |
|
2700
Grupo Cibest SA
CIB
$20.4B
| $1.01M | ﹤0.01% |
+25,131
| New | +$987K |
|
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.