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 | |
|---|---|---|---|---|---|---|
3526
PUT
CorMedix
CRMD
$571M
| $436K | ﹤0.01% |
70,900
+34,200
| +93% | +$354K |
|
3527
HubSpot
HUBS
$12.1B
| $436K | ﹤0.01% |
+764
| New | +$536K |
|
3528
CALL
Ardelyx
ARDX
$1.25B
| $435K | ﹤0.01% |
88,700
-159,200
| -64% | -$855K |
|
|
FINV
3529
FinVolution Group
FINV
$1.15B
| $435K | ﹤0.01% |
45,260
+36,620
| +424% | +$300K |
|
|
GRMN
3530
PUT
Garmin
GRMN
$48.7B
| $434K | ﹤0.01% |
2,000
-14,200
| -88% | -$3.07M |
|
3531
PUT
Lightbridge
LTBR
$257M
| $434K | ﹤0.01% |
58,300
+1,600
| +3% | +$14.2K |
|
3532
CALL
BRC Group Holdings
RILY
$267M
| $434K | ﹤0.01% |
112,200
-157,300
| -58% | -$713K |
|
3533
PUT
TC Energy
TRP
$70.5B
| $434K | ﹤0.01% |
9,200
-5,100
| -36% | -$238K |
|
3534
PUT
Voya Financial
VOYA
$9.04B
| $433K | ﹤0.01% |
6,400
+5,900
| +1,180% | +$413K |
|
|
VRNT
3535
CALL
DELISTED
Verint Systems
VRNT
| $433K | ﹤0.01% |
24,300
-3,800
| -14% | -$90.9K |
|
3536
Biogen
BIIB
$30.6B
| $432K | ﹤0.01% |
3,159
-30,383
| -91% | -$4.34M |
|
3537
PUT
Genius Sports
GENI
$1.96B
| $432K | ﹤0.01% |
43,200
-6,900
| -14% | -$64K |
|
3538
PUT
Getty Images
GETY
$169M
| $432K | ﹤0.01% |
250,200
+245,100
| +4,806% | +$583K |
|
3539
Helix Energy Solutions
HLX
$1.34B
| $432K | ﹤0.01% |
52,094
+47,645
| +1,071% | +$401K |
|
3540
CALL
MKS Inc
MKSI
$19.3B
| $432K | ﹤0.01% |
5,400
+2,400
| +80% | +$242K |
|
3541
CALL
Portland General Electric
POR
$5.94B
| $432K | ﹤0.01% |
9,700
+4,700
| +94% | +$202K |
|
3542
PUT
VEON
VEON
$3.57B
| $431K | ﹤0.01% |
9,900
-5,000
| -34% | -$222K |
|
3543
PUT
VinFast Auto
VFS
$6.97B
| $431K | ﹤0.01% |
135,600
-48,900
| -27% | -$182K |
|
3544
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$159M
| $431K | ﹤0.01% |
+8,381
| New | +$388K |
|
3545
Applied Optoelectronics
AAOI
$7.06B
| $430K | ﹤0.01% |
28,067
-10,017
| -26% | -$252K |
|
3546
CALL
Marriott Vacations Worldwide
VAC
$3.51B
| $430K | ﹤0.01% |
6,700
+5,500
| +458% | +$437K |
|
3547
Worthington Enterprises
WOR
$2.82B
| $430K | ﹤0.01% |
8,587
+8,522
| +13,111% | +$359K |
|
3548
PUT
FuelCell Energy
FCEL
$1.57B
| $429K | ﹤0.01% |
93,600
-24,200
| -21% | -$180K |
|
|
HPP
3549
PUT
Hudson Pacific Properties
HPP
$764M
| $429K | ﹤0.01% |
20,814
+5,543
| +36% | +$116K |
|
3550
PUT
JB Hunt Transport Services
JBHT
$26.1B
| $429K | ﹤0.01% |
2,900
-21,600
| -88% | -$3.56M |
|
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.