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 | |
|---|---|---|---|---|---|---|
5501
PUT
Establishment Labs
ESTA
$2.72B
| $65K | ﹤0.01% |
1,600
-200
| -11% | -$7.46K |
|
5502
PUT
Lincoln Educational Services
LINC
$1.33B
| $65K | ﹤0.01% |
4,100
+400
| +11% | +$6.51K |
|
|
LOVE
5503
PUT
DELISTED
LoveSac
LOVE
| $65K | ﹤0.01% |
3,600
+2,600
| +260% | +$57K |
|
5504
CALL
Roundhill Ball Metaverse ETF
METV
$209M
| $65K | ﹤0.01% |
5,900
+3,900
| +195% | +$57K |
|
|
MSB
5505
CALL
Mesabi Trust
MSB
$289M
| $65K | ﹤0.01% |
2,400
+700
| +41% | +$19.2K |
|
5506
CALL
Playtika
PLTK
$1.52B
| $65K | ﹤0.01% |
12,700
-22,600
| -64% | -$142K |
|
5507
CALL
Privia Health
PRVA
$2.98B
| $65K | ﹤0.01% |
2,900
-20,200
| -87% | -$469K |
|
5508
PUT
SIGA Technologies
SIGA
$235M
| $65K | ﹤0.01% |
12,000
-80,900
| -87% | -$479K |
|
|
SRG
5509
CALL
Seritage Growth Properties
SRG
$136M
| $65K | ﹤0.01% |
20,300
-350,600
| -95% | -$1.28M |
|
5510
Sun Communities
SUI
$15.2B
| $65K | ﹤0.01% |
510
-2,884
| -85% | -$369K |
|
|
TSE
5511
CALL
DELISTED
Trinseo
TSE
| $65K | ﹤0.01% |
17,800
+15,700
| +748% | +$71.4K |
|
5512
Textron
TXT
$14.7B
| $65K | ﹤0.01% |
+908
| New | +$68K |
|
5513
CALL
VEON
VEON
$3.62B
| $65K | ﹤0.01% |
1,500
+1,300
| +650% | +$57.8K |
|
5514
PUT
Astrana Health
ASTH
$1.76B
| $65K | ﹤0.01% |
2,100
-5,100
| -71% | -$170K |
|
|
AMED
5515
PUT
DELISTED
Amedisys
AMED
| $64K | ﹤0.01% |
700
-15,000
| -96% | -$1.38M |
|
5516
PUT
BGC Group
BGC
$5.45B
| $64K | ﹤0.01% |
7,000
-25,200
| -78% | -$236K |
|
5517
PUT
Daktronics
DAKT
$955M
| $64K | ﹤0.01% |
5,300
+3,000
| +130% | +$45.3K |
|
5518
CALL
Exponent
EXPO
$3.24B
| $64K | ﹤0.01% |
800
-900
| -53% | -$78.4K |
|
5519
PUT
Fresenius Medical Care
FMS
$13.8B
| $64K | ﹤0.01% |
2,600
+1,600
| +160% | +$38.1K |
|
5520
First Trust Exchange-Traded Fund II First Trust International Equity Opportunities ETF
FPXI
$274M
| $64K | ﹤0.01% |
+1,365
| New | +$67.8K |
|
5521
CALL
Griffon
GFF
$3.95B
| $64K | ﹤0.01% |
+900
| New | +$66.4K |
|
5522
Gold Royalty Corp
GROY
$600M
| $64K | ﹤0.01% |
45,129
-9,256
| -17% | -$12.6K |
|
5523
Lufax Holding
LU
$1.35B
| $64K | ﹤0.01% |
21,657
+4,441
| +26% | +$12.3K |
|
5524
CALL
Plexus
PLXS
$6.72B
| $64K | ﹤0.01% |
500
| – | – |
|
|
SFIX
5525
CALL
Stitch Fix
SFIX
$536M
| $64K | ﹤0.01% |
19,700
-60,100
| -75% | -$274K |
|
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.