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 | |
|---|---|---|---|---|---|---|
3676
Skywest
SKYW
$4.51B
| $385K | ﹤0.01% |
4,415
-4,676
| -51% | -$478K |
|
3677
Unum
UNM
$14B
| $385K | ﹤0.01% |
4,732
-7,371
| -61% | -$568K |
|
3678
Customers Bancorp
CUBI
$2.69B
| $384K | ﹤0.01% |
+7,655
| New | +$402K |
|
|
CALY
3679
CALL
Callaway Golf Company
CALY
$3.28B
| $384K | ﹤0.01% |
58,400
-83,300
| -59% | -$611K |
|
3680
Vanguard World Funds Extended Duration ETF
EDV
$3.36B
| $383K | ﹤0.01% |
+5,396
| New | +$373K |
|
3681
Estee Lauder
EL
$30.7B
| $383K | ﹤0.01% |
+5,814
| New | +$421K |
|
3682
CALL
Elbit Systems
ESLT
$38.4B
| $383K | ﹤0.01% |
1,000
+900
| +900% | +$291K |
|
3683
Northern Trust
NTRS
$22.2B
| $383K | ﹤0.01% |
+3,883
| New | +$412K |
|
|
BBBY
3684
Bed Bath & Beyond
BBBY
$503M
| $382K | ﹤0.01% |
72,607
+26,561
| +58% | +$161K |
|
3685
PUT
Meritage Homes
MTH
$4.89B
| $382K | ﹤0.01% |
5,400
+2,200
| +69% | +$165K |
|
3686
Vipshop
VIPS
$7.13B
| $382K | ﹤0.01% |
24,419
-45,261
| -65% | -$684K |
|
|
VISN
3687
CALL
Vistance Networks Inc
VISN
$2.67B
| $381K | ﹤0.01% |
71,900
-214,300
| -75% | -$1.14M |
|
3688
CALL
RxSight
RXST
$250M
| $381K | ﹤0.01% |
15,100
-11,300
| -43% | -$336K |
|
|
SAFE
3689
PUT
Safehold
SAFE
$1.19B
| $381K | ﹤0.01% |
20,400
+16,800
| +467% | +$295K |
|
3690
CALL
TE Connectivity
TEL
$62.1B
| $381K | ﹤0.01% |
2,700
-13,600
| -83% | -$2.01M |
|
3691
Teucrium Wheat Fund
WEAT
$294M
| $381K | ﹤0.01% |
16,311
-3,797
| -19% | -$93.3K |
|
|
ONC
3692
PUT
BeOne Medicines Ltd
ONC
$34.3B
| $381K | ﹤0.01% |
1,400
-1,400
| -50% | -$327K |
|
3693
CALL
St. Joe Company
JOE
$3.57B
| $380K | ﹤0.01% |
8,100
+6,400
| +376% | +$299K |
|
3694
PUT
Telus
TU
$16.7B
| $380K | ﹤0.01% |
26,500
-3,100
| -10% | -$45.5K |
|
3695
PUT
A.O. Smith
AOS
$8.82B
| $379K | ﹤0.01% |
5,800
+3,200
| +123% | +$216K |
|
3696
PUT
ASP Isotopes
ASPI
$475M
| $379K | ﹤0.01% |
80,900
+64,800
| +402% | +$323K |
|
3697
Bitwise Bitcoin ETF
BITB
$2.45B
| $379K | ﹤0.01% |
8,453
+2,864
| +51% | +$145K |
|
3698
Direxion Daily GOOGL Bull 2X ETF
GGLL
$873M
| $379K | ﹤0.01% |
+13,215
| New | +$544K |
|
3699
Procept Biorobotics
PRCT
$1.03B
| $379K | ﹤0.01% |
+6,522
| New | +$445K |
|
3700
PUT
Compass Minerals
CMP
$1.25B
| $378K | ﹤0.01% |
40,700
-336,700
| -89% | -$3.84M |
|
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.