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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7651
CALL
BeyondSpring
BYSI
$47.3M
| $49K | ﹤0.01% |
4,700
+4,659
| +11,363% | +$49.1K |
|
7652
CALL
Cytokinetics
CYTK
$10.6B
| $49K | ﹤0.01% |
+2,500
| New | +$58.7K |
|
7653
PUT
G-III Apparel Group
GIII
$1.54B
| $49K | ﹤0.01% |
1,500
+1,474
| +5,669% | +$47.7K |
|
7654
PUT
Gentex
GNTX
$5.1B
| $49K | ﹤0.01% |
1,500
+1,389
| +1,251% | +$48.2K |
|
|
GTY
7655
CALL
Getty Realty Corp
GTY
$2.16B
| $49K | ﹤0.01% |
1,600
+1,529
| +2,154% | +$47.8K |
|
7656
CALL
Kaiser Aluminum
KALU
$2.48B
| $49K | ﹤0.01% |
+400
| New | +$49.9K |
|
7657
PUT
Methode Electronics
MEI
$458M
| $49K | ﹤0.01% |
1,000
+977
| +4,248% | +$45.5K |
|
|
MVO
7658
PUT
DELISTED
MV Oil Trust
MVO
| $49K | ﹤0.01% |
+5,800
| New | +$35.3K |
|
7659
CALL
Nice
NICE
$6.15B
| $49K | ﹤0.01% |
200
+189
| +1,718% | +$43.5K |
|
7660
CALL
Power Integrations
POWI
$3.15B
| $49K | ﹤0.01% |
+600
| New | +$48.4K |
|
7661
PUT
RF Industries
RFIL
$116M
| $49K | ﹤0.01% |
6,700
+6,613
| +7,601% | +$46.7K |
|
7662
Rush Enterprises Class A
RUSHA
$6.34B
| $49K | ﹤0.01% |
1,719
+1,332
| +344% | +$42.6K |
|
7663
SK Telecom
SKM
$11.4B
| $49K | ﹤0.01% |
955
-37
| -4% | -$1.88K |
|
7664
CALL
SPS Commerce
SPSC
$2.55B
| $49K | ﹤0.01% |
500
+496
| +12,400% | +$49K |
|
7665
CALL
Wabash National
WNC
$504M
| $49K | ﹤0.01% |
3,100
+3,015
| +3,547% | +$51.8K |
|
|
BIOR
7666
PUT
DELISTED
Biora Therapeutics, Inc. Common Stock
BIOR
| $49K | ﹤0.01% |
+55
| New | +$42.1K |
|
|
SMED
7667
CALL
DELISTED
Sharps Compliance Corp
SMED
| $49K | ﹤0.01% |
4,800
+4,712
| +5,355% | +$65.6K |
|
|
RESN
7668
DELISTED
Resonant Inc.
RESN
| $49K | ﹤0.01% |
15,395
-18,966
| -55% | -$65.1K |
|
|
AMED
7669
CALL
DELISTED
Amedisys
AMED
| $48K | ﹤0.01% |
200
+197
| +6,567% | +$51.7K |
|
7670
AZZ Inc
AZZ
$4.24B
| $48K | ﹤0.01% |
+929
| New | +$48.8K |
|
|
BPMC
7671
DELISTED
Blueprint Medicines
BPMC
| $48K | ﹤0.01% |
+551
| New | +$50.5K |
|
|
BQ
7672
PUT
Boqii Holding Ltd
BQ
$5.73M
| $48K | ﹤0.01% |
55
+54
| +5,400% | +$50.8K |
|
7673
PUT
CPS Technologies
CPSH
$67.6M
| $48K | ﹤0.01% |
5,000
+4,948
| +9,515% | +$38.7K |
|
7674
CALL
Freshpet
FRPT
$3.04B
| $48K | ﹤0.01% |
300
+271
| +934% | +$46.2K |
|
7675
PUT
Gilat Satellite Networks
GILT
$789M
| $48K | ﹤0.01% |
4,800
+4,745
| +8,627% | +$47.3K |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.