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 | |
|---|---|---|---|---|---|---|
|
TGB
4776
PUT
Trekor Metals
TGB
$2.59B
| $131K | ﹤0.01% |
58,700
+7,900
| +16% | +$16.8K |
|
4777
ProShares Ultra Semiconductors
USD
$2.4B
| $131K | ﹤0.01% |
6,536
-11,564
| -64% | -$332K |
|
4778
Algonquin Power & Utilities
AQN
$4.6B
| $130K | ﹤0.01% |
25,408
+10,900
| +75% | +$51.5K |
|
4779
CALL
Autohome
ATHM
$2.63B
| $130K | ﹤0.01% |
4,700
+3,000
| +176% | +$85.2K |
|
4780
PUT
Credicorp
BAP
$32B
| $130K | ﹤0.01% |
+700
| New | +$130K |
|
4781
CALL
Celldex Therapeutics
CLDX
$3.02B
| $130K | ﹤0.01% |
7,200
-118,400
| -94% | -$2.65M |
|
4782
Americold
COLD
$4.13B
| $130K | ﹤0.01% |
6,098
-3,901
| -39% | -$84.8K |
|
4783
CALL
PetMed Express
PETS
$42.3M
| $130K | ﹤0.01% |
31,200
+16,400
| +111% | +$74.5K |
|
4784
PUT
Park Hotels & Resorts
PK
$3.03B
| $130K | ﹤0.01% |
12,200
-26,200
| -68% | -$332K |
|
|
SVC
4785
PUT
Service Properties Trust
SVC
$1.04B
| $130K | ﹤0.01% |
10,020
+1,400
| +16% | +$19K |
|
|
FNA
4786
PUT
DELISTED
Paragon 28, Inc.
FNA
| $130K | ﹤0.01% |
+10,000
| New | +$124K |
|
|
AMPS
4787
CALL
DELISTED
Altus Power
AMPS
| $130K | ﹤0.01% |
26,300
-120,200
| -82% | -$546K |
|
|
BWAY
4788
CALL
Brainsway
BWAY
$612M
| $129K | ﹤0.01% |
+27,400
| New | +$139K |
|
4789
CALL
Patria Investments
PAX
$1.77B
| $129K | ﹤0.01% |
11,500
+6,900
| +150% | +$80.5K |
|
4790
CALL
Ryder
R
$9.9B
| $129K | ﹤0.01% |
900
-1,000
| -53% | -$156K |
|
4791
Alerian MLP ETF
AMLP
$12.9B
| $128K | ﹤0.01% |
+2,479
| New | +$127K |
|
4792
PUT
Grupo Cibest SA
CIB
$22.3B
| $128K | ﹤0.01% |
3,200
+3,100
| +3,100% | +$122K |
|
4793
CALL
Cooper-Standard Automotive
CPS
$514M
| $128K | ﹤0.01% |
8,400
+500
| +6% | +$7.47K |
|
4794
PUT
Amdocs
DOX
$5.87B
| $128K | ﹤0.01% |
1,400
+1,300
| +1,300% | +$113K |
|
4795
CALL
Immunome
IMNM
$2.61B
| $128K | ﹤0.01% |
19,100
+18,500
| +3,083% | +$177K |
|
4796
James Hardie Industries
JHX
$15.4B
| $128K | ﹤0.01% |
+5,464
| New | +$172K |
|
|
MAG
4797
PUT
DELISTED
MAG Silver
MAG
| $128K | ﹤0.01% |
8,400
-3,700
| -31% | -$57.4K |
|
|
MREO
4798
CALL
Mereo BioPharma
MREO
$50.3M
| $128K | ﹤0.01% |
56,900
+38,600
| +211% | +$109K |
|
|
OCFT
4799
PUT
DELISTED
OneConnect Financial Technology
OCFT
| $128K | ﹤0.01% |
+19,200
| New | +$85K |
|
4800
PUT
Marriott Vacations Worldwide
VAC
$3.35B
| $128K | ﹤0.01% |
2,000
-3,900
| -66% | -$310K |
|
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.