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 | |
|---|---|---|---|---|---|---|
|
ABK
4751
PUT
DELISTED
Ambac Financial Group
ABK
| $134K | ﹤0.01% |
15,400
+4,500
| +41% | +$39.2K |
|
4752
PUT
Atlas Energy Solutions
AESI
$1.29B
| $133K | ﹤0.01% |
+7,500
| New | +$156K |
|
4753
PUT
Byrna Technologies
BYRN
$103M
| $133K | ﹤0.01% |
7,900
-6,800
| -46% | -$176K |
|
4754
CALL
Capital Southwest
CSWC
$1.47B
| $133K | ﹤0.01% |
6,000
-8,600
| -59% | -$194K |
|
4755
Denison Mines
DNN
$2.64B
| $133K | ﹤0.01% |
103,011
-370,516
| -78% | -$618K |
|
4756
CALL
JELD-WEN Holding
JELD
$117M
| $133K | ﹤0.01% |
22,400
+20,100
| +874% | +$149K |
|
4757
CALL
Paysafe
PSFE
$434M
| $133K | ﹤0.01% |
8,500
-16,900
| -67% | -$307K |
|
|
TXNM
4758
PUT
TXNM Energy Inc
TXNM
$6.42B
| $133K | ﹤0.01% |
+2,500
| New | +$125K |
|
4759
CALL
CrossAmerica Partners
CAPL
$831M
| $132K | ﹤0.01% |
5,400
-10,900
| -67% | -$250K |
|
4760
CALL
Ezcorp Inc
EZPW
$1.79B
| $132K | ﹤0.01% |
9,000
+3,900
| +76% | +$51.5K |
|
4761
CALL
Lincoln Electric
LECO
$13.7B
| $132K | ﹤0.01% |
700
-600
| -46% | -$118K |
|
4762
CALL
NewtekOne
NEWT
$423M
| $132K | ﹤0.01% |
11,100
+9,500
| +594% | +$120K |
|
4763
CALL
Northwest Natural Holdings
NWN
$2.11B
| $132K | ﹤0.01% |
3,100
+2,200
| +244% | +$89.7K |
|
4764
PUT
Primoris Services
PRIM
$4.65B
| $132K | ﹤0.01% |
2,300
+2,000
| +667% | +$145K |
|
4765
Simplify Short Term Treasury Futures Strategy ETF
TUA
$699M
| $132K | ﹤0.01% |
6,053
+4,669
| +337% | +$100K |
|
4766
CALL
American Financial Group
AFG
$11.8B
| $131K | ﹤0.01% |
+1,000
| New | +$129K |
|
|
DAO
4767
CALL
Youdao
DAO
$1.97B
| $131K | ﹤0.01% |
17,300
-4,900
| -22% | -$40.4K |
|
|
DSL
4768
CALL
DoubleLine Income Solutions Fund
DSL
$1.23B
| $131K | ﹤0.01% |
10,400
+9,400
| +940% | +$119K |
|
4769
CALL
DXP Enterprises
DXPE
$2.4B
| $131K | ﹤0.01% |
+1,600
| New | +$148K |
|
4770
CALL
Energizer
ENR
$1.44B
| $131K | ﹤0.01% |
4,400
+200
| +5% | +$6.4K |
|
4771
Golub Capital BDC
GBDC
$3.34B
| $131K | ﹤0.01% |
8,686
+4,129
| +91% | +$63.4K |
|
4772
PUT
G-III Apparel Group
GIII
$1.55B
| $131K | ﹤0.01% |
4,800
-6,900
| -59% | -$200K |
|
4773
CALL
Goldman Sachs BDC
GSBD
$975M
| $131K | ﹤0.01% |
11,300
+6,100
| +117% | +$76.3K |
|
4774
IMAX
IMAX
$2.61B
| $131K | ﹤0.01% |
4,984
-595
| -11% | -$14.8K |
|
4775
PUT
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.37B
| $131K | ﹤0.01% |
2,700
-7,400
| -73% | -$370K |
|
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.