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 | |
|---|---|---|---|---|---|---|
|
SMLR
3576
DELISTED
Semler Scientific
SMLR
| $421K | ﹤0.01% |
11,657
+3,752
| +47% | +$176K |
|
3577
PUT
Toro Company
TTC
$9.08B
| $421K | ﹤0.01% |
5,800
-2,300
| -28% | -$182K |
|
3578
CONMED
CNMD
$1.33B
| $420K | ﹤0.01% |
6,965
-8,375
| -55% | -$540K |
|
3579
Evolv Technologies
EVLV
$1.01B
| $420K | ﹤0.01% |
134,794
-141,291
| -51% | -$496K |
|
3580
PUT
Evergy
EVRG
$19.7B
| $420K | ﹤0.01% |
6,100
-10,900
| -64% | -$713K |
|
3581
PUT
Helmerich & Payne
HP
$3.31B
| $420K | ﹤0.01% |
16,100
+3,000
| +23% | +$87.2K |
|
|
OPRA
3582
CALL
Opera Ltd
OPRA
$1.71B
| $419K | ﹤0.01% |
26,300
-500
| -2% | -$9.26K |
|
3583
PUT
Alliant Energy
LNT
$19.1B
| $418K | ﹤0.01% |
6,500
-1,100
| -14% | -$67.3K |
|
3584
CALL
Comstock
LODE
$215M
| $418K | ﹤0.01% |
171,500
+140,040
| +445% | +$465K |
|
3585
PUT
Nordic American Tanker
NAT
$1.35B
| $418K | ﹤0.01% |
170,100
-14,800
| -8% | -$39K |
|
3586
Sociedad Química y Minera de Chile
SQM
$19.1B
| $418K | ﹤0.01% |
+10,523
| New | +$422K |
|
3587
iShares US Real Estate ETF
IYR
$4.76B
| $417K | ﹤0.01% |
+4,360
| New | +$415K |
|
3588
CALL
Vera Therapeutics
VERA
$2.39B
| $417K | ﹤0.01% |
17,400
+16,000
| +1,143% | +$514K |
|
|
AHRT
3589
PUT
AH Realty Trust
AHRT
$540M
| $416K | ﹤0.01% |
55,400
+52,200
| +1,631% | +$474K |
|
|
BPMC
3590
DELISTED
Blueprint Medicines
BPMC
| $416K | ﹤0.01% |
4,704
-1,904
| -29% | -$186K |
|
3591
CALL
NiSource
NI
$21.9B
| $416K | ﹤0.01% |
10,400
-3,100
| -23% | -$119K |
|
|
ORLA
3592
CALL
Orla Mining
ORLA
$3.42B
| $416K | ﹤0.01% |
44,500
+44,200
| +14,733% | +$314K |
|
3593
PUT
Children's Place
PLCE
$55.8M
| $416K | ﹤0.01% |
47,700
+19,100
| +67% | +$178K |
|
3594
PUT
Global Ship Lease
GSL
$1.57B
| $415K | ﹤0.01% |
18,200
-37,700
| -67% | -$843K |
|
|
ONIT
3595
Onity Group
ONIT
$341M
| $415K | ﹤0.01% |
12,842
+6,334
| +97% | +$210K |
|
|
BERY
3596
DELISTED
Berry Global Group, Inc.
BERY
| $415K | ﹤0.01% |
5,948
+4,986
| +518% | +$346K |
|
|
AZUL
3597
CALL
DELISTED
Azul
AZUL
| $414K | ﹤0.01% |
252,700
-504,200
| -67% | -$991K |
|
3598
CALL
Invesco CurrencyShares Canadian Dollar Trust
FXC
$72.7M
| $414K | ﹤0.01% |
6,100
+5,100
| +510% | +$347K |
|
3599
PUT
Lightspeed Commerce
LSPD
$1.41B
| $414K | ﹤0.01% |
47,400
-8,600
| -15% | -$111K |
|
3600
CALL
Tiptree Inc
TIPT
$678M
| $414K | ﹤0.01% |
+17,200
| New | +$366K |
|
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.