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 |
Apple
AAPL
|
+$179M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$90.1M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$56M |
| 4 |
iShares Silver Trust
SLV
|
+$41.7M |
| 5 |
Advanced Micro Devices
AMD
|
+$39.8M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.8M |
| 2 |
Verizon
VZ
|
+$42.5M |
| 3 |
Occidental Petroleum
OXY
|
+$34.7M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Direxion Daily S&P 500 Bull 3x ETF
SPXL
|
+$32.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.67% |
| 2 | Consumer Discretionary | 0.37% |
| 3 | Industrials | 0.24% |
| 4 | Healthcare | 0.22% |
| 5 | Financials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4776
Gold Royalty Corp
GROY
$602M
| $255K | ﹤0.01% |
62,090
+38,534
| +164% | +$163K |
|
4777
CALL
InterDigital
IDCC
$6.75B
| $255K | ﹤0.01% |
4,000
+1,700
| +74% | +$113K |
|
4778
Republic Services
RSG
$67.4B
| $255K | ﹤0.01% |
+1,929
| New | +$245K |
|
4779
Sasol
SSL
$7.4B
| $255K | ﹤0.01% |
10,572
-4,294
| -29% | -$93.8K |
|
|
ONIT
4780
Onity Group
ONIT
$342M
| $255K | ﹤0.01% |
10,743
+8,095
| +306% | +$264K |
|
4781
PUT
AeroVironment
AVAV
$7.19B
| $254K | ﹤0.01% |
2,700
-27,200
| -91% | -$1.88M |
|
4782
CALL
Brown-Forman Class B
BF.B
$13.5B
| $254K | ﹤0.01% |
3,800
-700
| -16% | -$46.6K |
|
|
TPC
4783
PUT
Tutor Perini Cor
TPC
$4.03B
| $254K | ﹤0.01% |
23,600
+1,900
| +9% | +$21.3K |
|
|
VRAY
4784
CALL
DELISTED
ViewRay, Inc.
VRAY
| $254K | ﹤0.01% |
65,000
-2,300
| -3% | -$9.79K |
|
4785
PUT
ABM Industries
ABM
$2.89B
| $253K | ﹤0.01% |
5,500
+2,300
| +72% | +$100K |
|
4786
CALL
Constellation Energy
CEG
$92.1B
| $253K | ﹤0.01% |
+4,500
| New | +$220K |
|
4787
CALL
Oxford Industries
OXM
$581M
| $253K | ﹤0.01% |
2,800
+2,100
| +300% | +$185K |
|
4788
PUT
FreightCar America
RAIL
$263M
| $253K | ﹤0.01% |
42,900
+23,400
| +120% | +$95.9K |
|
4789
RLX Technology
RLX
$2.37B
| $253K | ﹤0.01% |
141,679
-39,106
| -22% | -$116K |
|
|
VLTA
4790
DELISTED
Volta Inc.
VLTA
| $253K | ﹤0.01% |
83,044
+50,939
| +159% | +$245K |
|
4791
ESS Tech
GWH
$21M
| $252K | ﹤0.01% |
+3,027
| New | +$270K |
|
|
INFA
4792
CALL
DELISTED
Informatica
INFA
| $252K | ﹤0.01% |
+12,800
| New | +$308K |
|
|
MITT
4793
CALL
TPG Mortgage Investment Trust
MITT
$228M
| $252K | ﹤0.01% |
27,100
-54,800
| -67% | -$527K |
|
4794
Snowflake
SNOW
$98.1B
| $252K | ﹤0.01% |
1,100
-10,098
| -90% | -$2.61M |
|
|
TEF
4795
CALL
DELISTED
Telefonica
TEF
| $252K | ﹤0.01% |
54,297
+24,774
| +84% | +$110K |
|
|
VRN
4796
DELISTED
Veren
VRN
| $252K | ﹤0.01% |
34,895
+22,232
| +176% | +$150K |
|
4797
PUT
AerSale
ASLE
$291M
| $251K | ﹤0.01% |
16,000
+10,900
| +214% | +$168K |
|
4798
CALL
Atea Pharmaceuticals
AVIR
$370M
| $251K | ﹤0.01% |
34,800
-12,900
| -27% | -$87.6K |
|
|
RADA
4799
DELISTED
Rada Electronic Industries Ltd
RADA
| $251K | ﹤0.01% |
18,080
-14,342
| -44% | -$163K |
|
|
TUZ
4800
CALL
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $251K | ﹤0.01% |
+1,900
| New | +$251K |
|
Similar funds
Simplex Trading's Q1 2022 Portfolio in Review
As of Q1 2022, Simplex Trading held 12,038 positions worth $109B, up 10% from $99B the previous quarter. Its ten largest holdings account for 37% of the portfolio.
Simplex Trading deployed $17.5B of net new capital in Q1 2022, opening 1,603 new positions and adding to 4,441 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 652,921 shares worth $86.2M.
By sector, the portfolio is most concentrated in Technology at 0.67% of assets, up from 0.61% a quarter earlier, followed by Consumer Discretionary and Industrials.
On the sell side, the largest reduction was Verizon, an estimated $42.5M trimmed.
- Simplex Trading's largest Q1 2022 buy was iShares 20+ Year Treasury Bond ETF: 652,921 shares worth $86.2M.
- Simplex Trading added most to Apple in Q1 2022, an estimated $179M increase.
- Simplex Trading's biggest Q1 2022 reduction was Verizon, cutting an estimated $42.5M.
- Simplex Trading fully exited State Street Financial Select Sector SPDR ETF in Q1 2022, selling an estimated $42.8M.
- Simplex Trading's ten largest holdings make up 37% of its $109B portfolio in Q1 2022.
- Simplex Trading opened 1,603 new positions and closed 1,637 in Q1 2022.
- Simplex Trading's portfolio value rose 10% quarter-over-quarter to $109B.
Based on Simplex Trading's 13F filing for Q1 2022, filed 2 May 2022.