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 | |
|---|---|---|---|---|---|---|
4476
Build-A-Bear
BBW
$445M
| $314K | ﹤0.01% |
17,189
+7,495
| +77% | +$142K |
|
4477
CALL
CMS Energy
CMS
$23B
| $314K | ﹤0.01% |
4,500
+4,200
| +1,400% | +$272K |
|
4478
PUT
Hormel Foods
HRL
$14.2B
| $314K | ﹤0.01% |
6,100
-11,700
| -66% | -$573K |
|
4479
CALL
Motorola Solutions
MSI
$72.1B
| $314K | ﹤0.01% |
1,300
-100
| -7% | -$23.2K |
|
4480
CALL
Pentair
PNR
$10.8B
| $314K | ﹤0.01% |
5,800
-17,200
| -75% | -$1.04M |
|
4481
PUT
QuinStreet
QNST
$927M
| $314K | ﹤0.01% |
27,100
-1,000
| -4% | -$13.4K |
|
4482
SiTime
SITM
$13.8B
| $314K | ﹤0.01% |
1,269
-3,133
| -71% | -$679K |
|
|
SOHU
4483
PUT
Sohu.com
SOHU
$352M
| $314K | ﹤0.01% |
18,700
+7,000
| +60% | +$121K |
|
4484
CALL
Xeris Biopharma Holdings
XERS
$1.45B
| $314K | ﹤0.01% |
122,800
+25,300
| +26% | +$61.8K |
|
|
ACRE
4485
CALL
Ares Commercial Real Estate
ACRE
$247M
| $313K | ﹤0.01% |
20,200
-53,500
| -73% | -$787K |
|
4486
PUT
Autohome
ATHM
$2.62B
| $313K | ﹤0.01% |
10,300
+6,400
| +164% | +$194K |
|
4487
CALL
Cannae Holdings
CNNE
$653M
| $313K | ﹤0.01% |
13,100
-800
| -6% | -$22.5K |
|
4488
PUT
Energizer
ENR
$1.47B
| $313K | ﹤0.01% |
10,200
+7,000
| +219% | +$243K |
|
4489
PUT
Malibu Boats
MBUU
$548M
| $313K | ﹤0.01% |
5,400
+2,200
| +69% | +$142K |
|
4490
Ring Energy
REI
$307M
| $313K | ﹤0.01% |
82,191
+60,070
| +272% | +$184K |
|
|
JOBS
4491
DELISTED
51job Inc
JOBS
| $313K | ﹤0.01% |
+5,355
| New | +$274K |
|
|
EFC
4492
PUT
Ellington Financial
EFC
$1.69B
| $312K | ﹤0.01% |
17,600
+10,000
| +132% | +$176K |
|
4493
CALL
Alliant Energy
LNT
$18.6B
| $312K | ﹤0.01% |
5,000
+3,500
| +233% | +$208K |
|
4494
CALL
Semtech
SMTC
$9.65B
| $312K | ﹤0.01% |
4,500
-46,600
| -91% | -$3.34M |
|
|
LSI
4495
DELISTED
Life Storage, Inc.
LSI
| $312K | ﹤0.01% |
2,224
-13,618
| -86% | -$1.83M |
|
|
IELG
4496
CALL
DELISTED
ISHARES ENHANCED U.S. LARGE CAP ETF
IELG
| $312K | ﹤0.01% |
7,800
+7,700
| +7,700% | +$308K |
|
|
SLI
4497
CALL
Standard Lithium
SLI
$475M
| $311K | ﹤0.01% |
35,400
-21,900
| -38% | -$148K |
|
4498
CALL
Twist Bioscience
TWST
$5.32B
| $311K | ﹤0.01% |
6,300
+3,800
| +152% | +$211K |
|
|
ECOL
4499
PUT
DELISTED
US Ecology, Inc.
ECOL
| $311K | ﹤0.01% |
+6,500
| New | +$260K |
|
4500
PUT
Carpenter Technology
CRS
$26.4B
| $310K | ﹤0.01% |
7,400
+3,000
| +68% | +$105K |
|
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.