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 | |
|---|---|---|---|---|---|---|
4901
Credicorp
BAP
$32B
| $116K | ﹤0.01% |
+626
| New | +$116K |
|
4902
PUT
Bain Capital Specialty
BCSF
$810M
| $116K | ﹤0.01% |
7,000
+6,900
| +6,900% | +$122K |
|
4903
CALL
Driven Brands
DRVN
$2.37B
| $116K | ﹤0.01% |
6,800
-6,200
| -48% | -$101K |
|
4904
PUT
DoubleVerify
DV
$1.69B
| $116K | ﹤0.01% |
8,700
+3,400
| +64% | +$63K |
|
4905
Ecovyst
ECVT
$1.32B
| $116K | ﹤0.01% |
+18,732
| New | +$139K |
|
4906
PUT
FerroAtlántica
GSM
$600M
| $116K | ﹤0.01% |
31,500
-31,900
| -50% | -$123K |
|
|
THS
4907
CALL
DELISTED
Treehouse Foods
THS
| $116K | ﹤0.01% |
4,300
+100
| +2% | +$3.17K |
|
4908
W&T Offshore
WTI
$515M
| $116K | ﹤0.01% |
75,179
+37,286
| +98% | +$61.5K |
|
|
BWIN
4909
CALL
Baldwin Insurance Group
BWIN
$2.6B
| $116K | ﹤0.01% |
2,600
-1,300
| -33% | -$52.9K |
|
4910
CALL
Asure Software
ASUR
$240M
| $115K | ﹤0.01% |
12,100
+2,100
| +21% | +$23K |
|
4911
CALL
CEVA Inc
CEVA
$916M
| $115K | ﹤0.01% |
4,500
+2,500
| +125% | +$80.3K |
|
4912
CALL
Lexicon Pharmaceuticals
LXRX
$1.04B
| $115K | ﹤0.01% |
251,600
+131,300
| +109% | +$82.8K |
|
4913
PUT
Matsons
MATX
$6.16B
| $115K | ﹤0.01% |
+900
| New | +$123K |
|
4914
Playboy Inc
PLBY
$133M
| $115K | ﹤0.01% |
104,884
+89,744
| +593% | +$140K |
|
4915
PUT
Reliance Steel & Aluminium
RS
$20.5B
| $115K | ﹤0.01% |
400
-400
| -50% | -$114K |
|
4916
PUT
SFL Corp
SFL
$1.64B
| $115K | ﹤0.01% |
14,100
-16,400
| -54% | -$158K |
|
4917
CALL
Arrow Electronics
ARW
$10.9B
| $114K | ﹤0.01% |
+1,100
| New | +$121K |
|
4918
BuzzFeed
BZFD
$99.9M
| $114K | ﹤0.01% |
53,762
-193,121
| -78% | -$461K |
|
|
CAN
4919
PUT
Canaan Creative
CAN
$182M
| $114K | ﹤0.01% |
130,300
-14,500
| -10% | -$23K |
|
4920
DocGo
DCGO
$65.9M
| $114K | ﹤0.01% |
+43,405
| New | +$174K |
|
4921
CALL
FTI Consulting
FCN
$4.53B
| $114K | ﹤0.01% |
700
+400
| +133% | +$71.9K |
|
4922
CALL
Hain Celestial
HAIN
$44.4M
| $114K | ﹤0.01% |
27,700
+18,000
| +186% | +$80.5K |
|
4923
CALL
Kilroy Realty
KRC
$4.6B
| $114K | ﹤0.01% |
3,500
+3,000
| +600% | +$107K |
|
|
4924
Kilroy Realty
KRC
$4.6B
| $114K | ﹤0.01% |
+3,481
| New | +$125K |
|
4925
CALL
LoveSac
LOVE
$236M
| $114K | ﹤0.01% |
6,300
-1,000
| -14% | -$21.9K |
|
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.