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 | |
|---|---|---|---|---|---|---|
1576
PUT
Sony
SONY
$123B
| $1.59M | ﹤0.01% |
1,880
+1,150
| +158% | +$10.8K |
|
1577
CALL
TransDigm Group
TDG
$69.2B
| $1.59M | ﹤0.01% |
35
-64
| -65% | -$26K |
|
1578
PUT
KeyCorp
KEY
$24.3B
| $1.59M | ﹤0.01% |
1,008
+570
| +130% | +$9.51K |
|
1579
CALL
Rithm Capital
RITM
$5.09B
| $1.59M | ﹤0.01% |
939
-1,010
| -52% | -$16.6K |
|
1580
CALL
Pultegroup
PHM
$24.5B
| $1.58M | ﹤0.01% |
567
+198
| +54% | +$5.4K |
|
1581
PUT
Royal Gold
RGLD
$17.1B
| $1.58M | ﹤0.01% |
174
-8
| -4% | -$699 |
|
1582
CALL
AllianceBernstein
AB
$3.47B
| $1.58M | ﹤0.01% |
547
+77
| +16% | +$2.26K |
|
1583
CALL
HubSpot
HUBS
$10.5B
| $1.58M | ﹤0.01% |
95
-33
| -26% | -$5.23K |
|
1584
PUT
Universal Health Services
UHS
$9.43B
| $1.58M | ﹤0.01% |
118
+5
| +4% | +$658 |
|
1585
CALL
Entegris
ENTG
$19.7B
| $1.58M | ﹤0.01% |
442
+358
| +426% | +$11.9K |
|
1586
PUT
LivaNova
LIVN
$4.3B
| $1.57M | ﹤0.01% |
162
+94
| +138% | +$8.78K |
|
1587
CALL
Shenandoah Telecom
SHEN
$632M
| $1.57M | ﹤0.01% |
355
+325
| +1,083% | +$15.3K |
|
1588
PUT
CenterPoint Energy
CNP
$29.1B
| $1.57M | ﹤0.01% |
512
+452
| +753% | +$13.7K |
|
1589
PUT
Agnico Eagle Mines
AEM
$72.6B
| $1.57M | ﹤0.01% |
361
-758
| -68% | -$32.1K |
|
1590
PUT
AutoNation
AN
$6.97B
| $1.57M | ﹤0.01% |
439
+396
| +921% | +$14.4K |
|
1591
PUT
Editas Medicine
EDIT
$399M
| $1.56M | ﹤0.01% |
640
+116
| +22% | +$2.63K |
|
1592
CALL
Columbia Sportswear
COLM
$3.19B
| $1.56M | ﹤0.01% |
150
+4
| +3% | +$386 |
|
|
LOGM
1593
CALL
DELISTED
LogMein, Inc.
LOGM
| $1.56M | ﹤0.01% |
195
+86
| +79% | +$7.35K |
|
1594
CALL
Trimble
TRMB
$12.3B
| $1.56M | ﹤0.01% |
386
+241
| +166% | +$9.15K |
|
|
CTLT
1595
CALL
DELISTED
CATALENT, INC.
CTLT
| $1.56M | ﹤0.01% |
384
+28
| +8% | +$1.09K |
|
|
CADE
1596
PUT
DELISTED
Cadence Bancorporation
CADE
| $1.56M | ﹤0.01% |
+840
| New | +$16K |
|
|
PRAH
1597
CALL
DELISTED
PRA Health Sciences, Inc.
PRAH
| $1.55M | ﹤0.01% |
141
+83
| +143% | +$8.67K |
|
1598
Diamondback Energy
FANG
$57.6B
| $1.55M | ﹤0.01% |
+15,299
| New | +$1.57M |
|
1599
Howmet Aerospace
HWM
$116B
| $1.55M | ﹤0.01% |
105,923
+21,801
| +26% | +$312K |
|
1600
Capri Holdings
CPRI
$1.77B
| $1.55M | ﹤0.01% |
33,868
-20,807
| -38% | -$909K |
|
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.