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 | |
|---|---|---|---|---|---|---|
3751
CALL
Genpact
G
$5.87B
| $357K | ﹤0.01% |
7,100
+1,900
| +37% | +$94.2K |
|
3752
Morgan Stanley Direct Lending Fund
MSDL
$1.29B
| $357K | ﹤0.01% |
17,904
+9,840
| +122% | +$203K |
|
3753
PUT
Oshkosh
OSK
$9.51B
| $357K | ﹤0.01% |
3,800
+300
| +9% | +$30K |
|
3754
Centene
CNC
$31.6B
| $356K | ﹤0.01% |
5,874
-33,892
| -85% | -$2.05M |
|
|
ETNB
3755
CALL
DELISTED
89bio
ETNB
| $356K | ﹤0.01% |
49,100
-22,600
| -32% | -$198K |
|
3756
Structure Therapeutics
GPCR
$3.4B
| $356K | ﹤0.01% |
20,604
+3,258
| +19% | +$79.8K |
|
|
VTLE
3757
DELISTED
Vital Energy
VTLE
| $356K | ﹤0.01% |
+16,818
| New | +$487K |
|
3758
PUT
Corvus Pharmaceuticals
CRVS
$1.12B
| $355K | ﹤0.01% |
111,800
-351,700
| -76% | -$1.66M |
|
3759
CALL
Hyatt Hotels
H
$17.8B
| $355K | ﹤0.01% |
2,900
-26,100
| -90% | -$3.76M |
|
3760
Kinetik
KNTK
$3.64B
| $355K | ﹤0.01% |
6,850
+686
| +11% | +$40.2K |
|
3761
CALL
Terex
TEX
$7.84B
| $355K | ﹤0.01% |
9,400
+1,600
| +21% | +$69.9K |
|
|
SW
3762
PUT
Smurfit Westrock
SW
$26.6B
| $355K | ﹤0.01% |
7,900
+7,200
| +1,029% | +$365K |
|
3763
CALL
Innoviz Technologies
INVZ
$99.5M
| $354K | ﹤0.01% |
543,100
+338,800
| +166% | +$392K |
|
3764
CALL
Burford Capital
BUR
$955M
| $351K | ﹤0.01% |
26,600
-36,000
| -58% | -$505K |
|
|
CPRX
3765
CALL
DELISTED
Catalyst Pharmaceutical
CPRX
| $351K | ﹤0.01% |
14,500
+9,300
| +179% | +$209K |
|
3766
PUT
Fomento Económico Mexicano
FMX
$43.5B
| $351K | ﹤0.01% |
3,600
+2,600
| +260% | +$235K |
|
|
OBE
3767
CALL
Obsidian Energy
OBE
$628M
| $351K | ﹤0.01% |
60,000
+43,000
| +253% | +$237K |
|
3768
PIMCO 25+ Year Zero Coupon US Treasury Index Exchange-Traded Fund
ZROZ
$1.37B
| $351K | ﹤0.01% |
4,911
+2,564
| +109% | +$179K |
|
3769
PUT
Invesco
IVZ
$13B
| $350K | ﹤0.01% |
23,100
-163,300
| -88% | -$2.79M |
|
|
HAPN
3770
PUT
Happen Inc
HAPN
$2.19B
| $350K | ﹤0.01% |
34,000
+8,400
| +33% | +$113K |
|
3771
PUT
Pool Corp
POOL
$7B
| $350K | ﹤0.01% |
1,100
| – | – |
|
3772
Advanced Drainage Systems
WMS
$11.1B
| $350K | ﹤0.01% |
+3,229
| New | +$376K |
|
3773
PUT
ACV Auctions
ACVA
$1.43B
| $349K | ﹤0.01% |
24,800
+24,600
| +12,300% | +$453K |
|
|
GRNY
3774
FundStrat Granny Shots US Large Cap ETF
GRNY
$4.28B
| $349K | ﹤0.01% |
19,207
-16,989
| -47% | -$337K |
|
3775
PUT
Agilon Health
AGL
$1.65B
| $348K | ﹤0.01% |
3,216
+2,996
| +1,362% | +$261K |
|
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.