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 | |
|---|---|---|---|---|---|---|
6601
Columbia Sportswear
COLM
$3.25B
| $19K | ﹤0.01% |
+254
| New | +$21.2K |
|
6602
CALL
Cumberland Pharmaceuticals
CPIX
$99.8M
| $19K | ﹤0.01% |
4,600
-7,700
| -63% | -$31.9K |
|
6603
PUT
Enovis
ENOV
$1.74B
| $19K | ﹤0.01% |
500
-700
| -58% | -$29.7K |
|
6604
PUT
Enova International
ENVA
$6.09B
| $19K | ﹤0.01% |
+200
| New | +$20.6K |
|
6605
iShares MSCI Sweden ETF
EWD
$534M
| $19K | ﹤0.01% |
+456
| New | +$19.2K |
|
|
XRN
6606
Chiron Real Estate Inc
XRN
$535M
| $19K | ﹤0.01% |
447
-97
| -18% | -$4.01K |
|
6607
CALL
Gold Royalty Corp
GROY
$602M
| $19K | ﹤0.01% |
13,400
+12,500
| +1,389% | +$17K |
|
6608
CALL
Helix Energy Solutions
HLX
$1.34B
| $19K | ﹤0.01% |
2,400
+1,900
| +380% | +$16K |
|
6609
CALL
Disc Medicine
IRON
$2.81B
| $19K | ﹤0.01% |
400
-700
| -64% | -$38.9K |
|
6610
KFA Mount Lucas Managed Futures Index Strategy ETF
KMLM
$384M
| $19K | ﹤0.01% |
715
+445
| +165% | +$12.2K |
|
6611
CALL
Kodiak Sciences
KOD
$2.5B
| $19K | ﹤0.01% |
6,800
+4,000
| +143% | +$21.7K |
|
6612
Marten Transport
MRTN
$1.22B
| $19K | ﹤0.01% |
1,437
-21,535
| -94% | -$320K |
|
6613
Nuvation Bio
NUVB
$2.29B
| $19K | ﹤0.01% |
10,947
-41,790
| -79% | -$95.1K |
|
6614
CALL
Navigator Holdings
NVGS
$1.35B
| $19K | ﹤0.01% |
1,500
+500
| +50% | +$7.77K |
|
6615
Ocugen
OCGN
$403M
| $19K | ﹤0.01% |
27,591
-145,170
| -84% | -$100K |
|
6616
PUT
Organogenesis Holdings
ORGO
$324M
| $19K | ﹤0.01% |
4,400
+3,900
| +780% | +$15.7K |
|
6617
PUT
OraSure Technologies
OSUR
$273M
| $19K | ﹤0.01% |
+5,800
| New | +$21.4K |
|
6618
Par Pacific Holdings
PARR
$4.17B
| $19K | ﹤0.01% |
1,355
+1,171
| +636% | +$18.4K |
|
|
PCH
6619
DELISTED
PotlatchDeltic
PCH
| $19K | ﹤0.01% |
+427
| New | +$18.8K |
|
6620
CALL
Relay Therapeutics
RLAY
$4B
| $19K | ﹤0.01% |
+7,600
| New | +$29.8K |
|
6621
ROBO Global Robotics & Automation Index ETF
ROBO
$1.87B
| $19K | ﹤0.01% |
383
+231
| +152% | +$13.2K |
|
6622
CALL
SandRidge Energy
SD
$503M
| $19K | ﹤0.01% |
1,700
-51,100
| -97% | -$606K |
|
6623
CALL
Cambria Tail Risk ETF
TAIL
$150M
| $19K | ﹤0.01% |
300
-100
| -25% | -$1.13K |
|
6624
PUT
Protara Therapeutics
TARA
$214M
| $19K | ﹤0.01% |
4,600
-15,200
| -77% | -$67.9K |
|
6625
PUT
Tiptree Inc
TIPT
$694M
| $19K | ﹤0.01% |
800
+300
| +60% | +$6.38K |
|
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.