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 | |
|---|---|---|---|---|---|---|
3551
CALL
Kratos Defense & Security Solutions
KTOS
$9.02B
| $211K | ﹤0.01% |
135
+7
| +5% | +$110 |
|
|
MPT
3552
CALL
Medical Properties Trust
MPT
$2.86B
| $211K | ﹤0.01% |
114
+10
| +10% | +$178 |
|
3553
PENN Entertainment
PENN
$2.83B
| $211K | ﹤0.01% |
+10,502
| New | +$246K |
|
3554
CALL
Perrigo
PRGO
$1.41B
| $211K | ﹤0.01% |
44
-262
| -86% | -$12.3K |
|
3555
CALL
abrdn Physical Gold Shares ETF
SGOL
$6.87B
| $211K | ﹤0.01% |
170
-110
| -39% | -$1.38K |
|
3556
PUT
W.R. Berkley
WRB
$28.2B
| $211K | ﹤0.01% |
84
+50
| +147% | +$1.18K |
|
|
BHVN
3557
CALL
DELISTED
Biohaven Pharmaceutical Holding Company Ltd.
BHVN
| $211K | ﹤0.01% |
41
+33
| +413% | +$1.43K |
|
3558
CALL
RB Global
RBA
$21.7B
| $210K | ﹤0.01% |
62
+61
| +6,100% | +$2.15K |
|
3559
Tredegar Corp
TG
$266M
| $210K | ﹤0.01% |
13,069
+11,010
| +535% | +$186K |
|
3560
TG Therapeutics
TGTX
$8.41B
| $210K | ﹤0.01% |
26,146
-11,512
| -31% | -$62.2K |
|
|
AYR
3561
DELISTED
Aircastle Ltd
AYR
| $210K | ﹤0.01% |
10,422
+9,302
| +831% | +$186K |
|
3562
CALL
Sonoco
SON
$5.97B
| $209K | ﹤0.01% |
+34
| New | +$1.96K |
|
3563
Unisys
UIS
$252M
| $209K | ﹤0.01% |
17,933
+9,496
| +113% | +$123K |
|
3564
PUT
US Foods
USFD
$22.5B
| $209K | ﹤0.01% |
60
-131
| -69% | -$4.49K |
|
|
LEXEA
3565
PUT
DELISTED
Liberty Expedia Holdings, Inc. Class A Common Stock
LEXEA
| $209K | ﹤0.01% |
+49
| New | +$2.11K |
|
3566
HDFC Bank
HDB
$122B
| $208K | ﹤0.01% |
7,200
+6,228
| +641% | +$162K |
|
3567
MacroGenics
MGNX
$241M
| $208K | ﹤0.01% |
11,588
+11,500
| +13,068% | +$199K |
|
|
MOMO
3568
Hello Group
MOMO
$869M
| $208K | ﹤0.01% |
5,442
-4,997
| -48% | -$160K |
|
3569
Murphy USA
MUSA
$11.2B
| $208K | ﹤0.01% |
2,430
+1,432
| +143% | +$113K |
|
3570
PUT
Invesco Aerospace & Defense ETF
PPA
$8.39B
| $208K | ﹤0.01% |
20
-13
| -39% | -$729 |
|
3571
PUT
ABM Industries
ABM
$2.87B
| $207K | ﹤0.01% |
57
-16
| -22% | -$556 |
|
3572
CALL
Guardant Health
GH
$19.1B
| $207K | ﹤0.01% |
+27
| New | +$1.5K |
|
3573
PUT
PetMed Express
PETS
$42.7M
| $207K | ﹤0.01% |
91
+48
| +112% | +$1.08K |
|
3574
Werner Enterprises
WERN
$2.33B
| $207K | ﹤0.01% |
+6,076
| New | +$202K |
|
3575
CALL
Arlo Technologies
ARLO
$1.55B
| $206K | ﹤0.01% |
499
+450
| +918% | +$2.49K |
|
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.