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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
BERY
2501
DELISTED
Berry Global Group, Inc.
BERY
| $585K | ﹤0.01% |
11,834
-3,716
| -24% | -$176K |
|
|
CHK
2502
PUT
DELISTED
Chesapeake Energy Corporation
CHK
| $585K | ﹤0.01% |
9
+2
| +29% | +$1.12K |
|
2503
Direxion Daily MSCI Emerging Markets Bull 3X ETF
EDC
$147M
| $584K | ﹤0.01% |
7,330
+6,232
| +568% | +$479K |
|
2504
BP
BP
$113B
| $582K | ﹤0.01% |
13,554
-16,618
| -55% | -$681K |
|
2505
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $582K | ﹤0.01% |
555
+351
| +172% | +$15.9K |
|
2506
Infosys
INFY
$45B
| $581K | ﹤0.01% |
+53,207
| New | +$563K |
|
|
LM
2507
DELISTED
Legg Mason, Inc.
LM
| $581K | ﹤0.01% |
21,235
-28,984
| -58% | -$831K |
|
2508
CALL
Vistra
VST
$55.1B
| $580K | ﹤0.01% |
223
-340
| -60% | -$8.58K |
|
|
CY
2509
PUT
DELISTED
Cypress Semiconductor
CY
| $580K | ﹤0.01% |
389
+139
| +56% | +$2.02K |
|
2510
PUT
Glaukos
GKOS
$9.02B
| $579K | ﹤0.01% |
74
+30
| +68% | +$2K |
|
|
SAFM
2511
DELISTED
Sanderson Farms Inc
SAFM
| $579K | ﹤0.01% |
4,399
+3,384
| +333% | +$405K |
|
|
AMWD
2512
PUT
DELISTED
American Woodmark
AMWD
| $578K | ﹤0.01% |
70
+67
| +2,233% | +$5.01K |
|
|
VSM
2513
PUT
DELISTED
Versum Materials, Inc.
VSM
| $578K | ﹤0.01% |
115
+75
| +188% | +$2.99K |
|
2514
PUT
Ericsson
ERIC
$30.7B
| $577K | ﹤0.01% |
629
-178
| -22% | -$1.61K |
|
2515
Harley-Davidson
HOG
$2.68B
| $577K | ﹤0.01% |
+16,194
| New | +$589K |
|
2516
PUT
Spok Holdings
SPOK
$221M
| $577K | ﹤0.01% |
424
+201
| +90% | +$2.79K |
|
|
CTLP
2517
CALL
DELISTED
Cantaloupe
CTLP
| $576K | ﹤0.01% |
1,389
+1,306
| +1,573% | +$5.85K |
|
|
CATM
2518
PUT
DELISTED
Cardtronics plc Class A Ordinary Shares (UK)
CATM
| $576K | ﹤0.01% |
162
+161
| +16,100% | +$4.8K |
|
|
USG
2519
PUT
DELISTED
Usg
USG
| $575K | ﹤0.01% |
133
-25
| -16% | -$1.08K |
|
2520
CALL
Popular Inc
BPOP
$11B
| $573K | ﹤0.01% |
110
+78
| +244% | +$4.14K |
|
2521
PUT
Flowserve
FLS
$9.25B
| $573K | ﹤0.01% |
127
+108
| +568% | +$4.71K |
|
2522
PUT
Antero Midstream
AM
$10.8B
| $571K | ﹤0.01% |
+415
| New | +$5.42K |
|
2523
PUT
Scansource
SCSC
$1.12B
| $569K | ﹤0.01% |
159
+158
| +15,800% | +$5.91K |
|
|
AFMD
2524
CALL
DELISTED
Affimed
AFMD
| $568K | ﹤0.01% |
135
+73
| +118% | +$2.63K |
|
2525
CACI
CACI
$10.8B
| $568K | ﹤0.01% |
+3,124
| New | +$532K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.