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 | |
|---|---|---|---|---|---|---|
8126
PUT
Backblaze
BLZE
$683M
| $22K | ﹤0.01% |
2,100
+1,500
| +250% | +$18.7K |
|
8127
PUT
CBAK Energy Technology Ltd
CBAT
$43.1M
| $22K | ﹤0.01% |
17,900
-23,500
| -57% | -$29.2K |
|
8128
Cerus
CERS
$575M
| $22K | ﹤0.01% |
4,018
-14,113
| -78% | -$78.1K |
|
8129
PUT
Churchill Downs
CHDN
$6.17B
| $22K | ﹤0.01% |
+200
| New | +$22K |
|
8130
PUT
Core Laboratories
CLB
$455M
| $22K | ﹤0.01% |
700
-100
| -13% | -$2.8K |
|
8131
Cohu
COHU
$1.86B
| $22K | ﹤0.01% |
755
-1,131
| -60% | -$36.1K |
|
8132
Carter's
CRI
$1.43B
| $22K | ﹤0.01% |
+243
| New | +$22.8K |
|
8133
PUT
DoubleVerify
DV
$1.77B
| $22K | ﹤0.01% |
900
-2,200
| -71% | -$57.2K |
|
8134
Ichor Holdings
ICHR
$2.17B
| $22K | ﹤0.01% |
636
+527
| +483% | +$20.5K |
|
8135
iShares Cybersecurity and Tech ETF
IHAK
$988M
| $22K | ﹤0.01% |
530
-3,261
| -86% | -$133K |
|
8136
CALL
iHeartMedia
IHRT
$531M
| $22K | ﹤0.01% |
1,200
-15,900
| -93% | -$317K |
|
8137
Korn Ferry
KFY
$4.31B
| $22K | ﹤0.01% |
+352
| New | +$23.7K |
|
8138
CALL
KT
KT
$8.74B
| $22K | ﹤0.01% |
1,600
+900
| +129% | +$11.9K |
|
8139
CALL
Loop Industries
LOOP
$34.8M
| $22K | ﹤0.01% |
2,500
-15,000
| -86% | -$125K |
|
8140
CALL
Lesaka Technologies
LSAK
$384M
| $22K | ﹤0.01% |
3,900
-61,000
| -94% | -$312K |
|
8141
PUT
Myriad Genetics
MYGN
$476M
| $22K | ﹤0.01% |
900
-400
| -31% | -$10.2K |
|
8142
CALL
Natural Health Trends
NHTC
$14.8M
| $22K | ﹤0.01% |
3,200
-1,100
| -26% | -$8K |
|
8143
Nerdy
NRDY
$108M
| $22K | ﹤0.01% |
4,390
-299,206
| -99% | -$1.33M |
|
8144
PUT
NETSCOUT
NTCT
$2.83B
| $22K | ﹤0.01% |
700
-1,900
| -73% | -$59.7K |
|
|
ONL
8145
CALL
Orion Office REIT
ONL
$151M
| $22K | ﹤0.01% |
+1,600
| New | +$27K |
|
8146
Provident Financial Services
PFS
$3.14B
| $22K | ﹤0.01% |
+956
| New | +$23K |
|
8147
PUT
Quest Resource Holding
QRHC
$27.6M
| $22K | ﹤0.01% |
3,600
+1,400
| +64% | +$9.22K |
|
|
RDHL
8148
PUT
Redhill Biopharma
RDHL
$4.15M
| $22K | ﹤0.01% |
9
-41
| -82% | -$97.2K |
|
8149
Construction Partners
ROAD
$5.88B
| $22K | ﹤0.01% |
847
+779
| +1,146% | +$20.6K |
|
8150
PUT
Star Group
SGU
$413M
| $22K | ﹤0.01% |
+2,000
| New | +$20.9K |
|
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.