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 | |
|---|---|---|---|---|---|---|
3551
Allot
ALLT
$373M
| $621K | ﹤0.01% |
76,782
+59,179
| +336% | +$539K |
|
3552
iShares US Basic Materials ETF
IYM
$1.14B
| $621K | ﹤0.01% |
4,156
-1,463
| -26% | -$202K |
|
3553
CALL
Manulife Financial
MFC
$73.2B
| $621K | ﹤0.01% |
29,100
+20,600
| +242% | +$422K |
|
3554
PUT
Organon & Co
OGN
$3.56B
| $621K | ﹤0.01% |
17,800
-8,700
| -33% | -$298K |
|
|
AMED
3555
CALL
DELISTED
Amedisys
AMED
| $620K | ﹤0.01% |
3,600
+2,000
| +125% | +$299K |
|
3556
PUT
Group 1 Automotive
GPI
$4.01B
| $620K | ﹤0.01% |
3,700
-6,200
| -63% | -$1.13M |
|
|
CODX
3557
CALL
Co-Diagnostics
CODX
$7.52M
| $619K | ﹤0.01% |
3,343
+900
| +37% | +$186K |
|
3558
CALL
Phillips Edison & Co
PECO
$5.46B
| $619K | ﹤0.01% |
+18,000
| New | +$591K |
|
3559
PUT
Aon
AON
$78.4B
| $618K | ﹤0.01% |
1,900
-800
| -30% | -$233K |
|
3560
CALL
Ionis Pharmaceuticals
IONS
$9.25B
| $618K | ﹤0.01% |
16,700
-7,500
| -31% | -$245K |
|
3561
PUT
Tenable Holdings
TENB
$3.58B
| $618K | ﹤0.01% |
10,700
+9,800
| +1,089% | +$506K |
|
3562
CALL
Varonis Systems
VRNS
$5.36B
| $618K | ﹤0.01% |
13,000
+4,000
| +44% | +$164K |
|
|
POLY
3563
DELISTED
Plantronics, Inc.
POLY
| $618K | ﹤0.01% |
15,702
+13,945
| +794% | +$397K |
|
|
DISCK
3564
CALL
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $618K | ﹤0.01% |
956,100
+554,000
| +138% | +$15M |
|
3565
Amphenol
APH
$184B
| $617K | ﹤0.01% |
+16,390
| New | +$635K |
|
3566
CALL
Ethan Allen Interiors
ETD
$592M
| $617K | ﹤0.01% |
23,700
+12,600
| +114% | +$325K |
|
3567
PUT
Aramark
ARMK
$15.2B
| $616K | ﹤0.01% |
22,714
-186,975
| -89% | -$4.88M |
|
3568
Flex
FLEX
$42.5B
| $616K | ﹤0.01% |
44,117
+43,607
| +8,550% | +$557K |
|
|
AVLR
3569
CALL
DELISTED
Avalara, Inc.
AVLR
| $616K | ﹤0.01% |
6,200
-14,500
| -70% | -$1.47M |
|
3570
PUT
Huntington Bancshares
HBAN
$34.7B
| $614K | ﹤0.01% |
42,000
-14,300
| -25% | -$224K |
|
|
MOMO
3571
CALL
Hello Group
MOMO
$869M
| $614K | ﹤0.01% |
106,400
-49,100
| -32% | -$426K |
|
3572
PUT
Newell Brands
NWL
$2.2B
| $614K | ﹤0.01% |
28,700
-11,900
| -29% | -$275K |
|
|
SBOW
3573
PUT
DELISTED
SilverBow Resources, Inc.
SBOW
| $614K | ﹤0.01% |
+19,200
| New | +$493K |
|
3574
Aldeyra Therapeutics
ALDX
$95.3M
| $612K | ﹤0.01% |
137,741
+44,002
| +47% | +$175K |
|
3575
CALL
MarketAxess Holdings
MKTX
$4.19B
| $612K | ﹤0.01% |
1,800
+400
| +29% | +$145K |
|
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.