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 | |
|---|---|---|---|---|---|---|
3051
CALL
Singularity Future Technology
SGLY
$241K
| $890K | ﹤0.01% |
6,350
+5,240
| +472% | +$353K |
|
3052
Pembina Pipeline
PBA
$29.9B
| $889K | ﹤0.01% |
+23,668
| New | +$799K |
|
3053
CALL
Celsius Holdings
CELH
$6.93B
| $888K | ﹤0.01% |
48,300
-900
| -2% | -$16.2K |
|
3054
CALL
Encompass Health
EHC
$11.2B
| $888K | ﹤0.01% |
15,713
-182,642
| -92% | -$9.54M |
|
3055
CALL
Mitek Systems
MITK
$762M
| $887K | ﹤0.01% |
60,500
-29,300
| -33% | -$449K |
|
3056
CALL
ZTO Express
ZTO
$18.2B
| $887K | ﹤0.01% |
35,500
-22,300
| -39% | -$630K |
|
3057
CALL
Azenta
AZTA
$1.26B
| $886K | ﹤0.01% |
10,700
+9,900
| +1,238% | +$850K |
|
3058
PUT
Box
BOX
$4.02B
| $886K | ﹤0.01% |
30,500
-66,400
| -69% | -$1.75M |
|
3059
PUT
Worthington Enterprises
WOR
$2.76B
| $884K | ﹤0.01% |
27,898
+27,574
| +8,510% | +$952K |
|
3060
PUT
JB Hunt Transport Services
JBHT
$27.1B
| $883K | ﹤0.01% |
4,400
-6,200
| -58% | -$1.24M |
|
|
CHS
3061
CALL
DELISTED
Chicos FAS, Inc.
CHS
| $883K | ﹤0.01% |
184,100
-26,500
| -13% | -$124K |
|
3062
Ciena
CIEN
$55.3B
| $881K | ﹤0.01% |
14,540
+466
| +3% | +$30.5K |
|
3063
CALL
AEye
LIDR
$52.3M
| $881K | ﹤0.01% |
5,370
+447
| +9% | +$51.2K |
|
3064
PUT
NOV
NOV
$7.45B
| $880K | ﹤0.01% |
44,900
+2,300
| +5% | +$40.3K |
|
3065
PUT
Quince Therapeutics
QNCX
$17.5M
| $880K | ﹤0.01% |
712
+514
| +260% | +$699K |
|
3066
CALL
Fulgent Genetics
FLGT
$559M
| $879K | ﹤0.01% |
14,100
+1,300
| +10% | +$85.6K |
|
3067
PUT
Innoviz Technologies
INVZ
$135M
| $879K | ﹤0.01% |
242,900
+126,400
| +108% | +$505K |
|
|
UNIT
3068
Uniti Group
UNIT
$2.63B
| $879K | ﹤0.01% |
+63,922
| New | +$809K |
|
3069
CALL
Progyny
PGNY
$2.44B
| $878K | ﹤0.01% |
17,100
+6,200
| +57% | +$266K |
|
3070
iShares MSCI Canada ETF
EWC
$6.04B
| $876K | ﹤0.01% |
21,797
+18,950
| +666% | +$732K |
|
3071
CALL
Duolingo
DUOL
$5.7B
| $875K | ﹤0.01% |
9,200
+3,700
| +67% | +$334K |
|
3072
CALL
Gentex
GNTX
$4.88B
| $875K | ﹤0.01% |
30,000
+26,800
| +838% | +$833K |
|
3073
CALL
Old Republic International
ORI
$10.3B
| $874K | ﹤0.01% |
33,800
+9,100
| +37% | +$235K |
|
|
GOL
3074
CALL
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $874K | ﹤0.01% |
121,500
+100
| +0.1% | +$636 |
|
3075
PUT
Kulicke & Soffa
KLIC
$5.3B
| $873K | ﹤0.01% |
15,600
-3,100
| -17% | -$171K |
|
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.