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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1101
Linde
LIN
$237B
| $2.6M | 0.01% |
+12,943
| New | +$2.42M |
|
1102
CALL
Norwegian Cruise Line
NCLH
$8.89B
| $2.6M | 0.01% |
484
+162
| +50% | +$9K |
|
1103
PUT
Columbia Sportswear
COLM
$3.19B
| $2.59M | 0.01% |
259
+2
| +0.8% | +$198 |
|
|
BHVN
1104
PUT
DELISTED
Biohaven Pharmaceutical Holding Company Ltd.
BHVN
| $2.59M | 0.01% |
592
+547
| +1,216% | +$30.8K |
|
1105
PUT
Signet Jewelers
SIG
$3.55B
| $2.59M | 0.01% |
1,449
-149
| -9% | -$3.2K |
|
1106
CALL
Popular Inc
BPOP
$11B
| $2.59M | 0.01% |
477
+367
| +334% | +$20K |
|
1107
Advance Auto Parts
AAP
$3.37B
| $2.58M | 0.01% |
16,738
+9,924
| +146% | +$1.61M |
|
1108
CALL
Molson Coors Class B
TAP
$7.68B
| $2.58M | 0.01% |
460
+171
| +59% | +$9.98K |
|
1109
PUT
Teladoc Health
TDOC
$1.58B
| $2.58M | 0.01% |
388
+76
| +24% | +$4.43K |
|
1110
CALL
Westlake Corp
WLK
$9.46B
| $2.58M | 0.01% |
371
+4
| +1% | +$266 |
|
|
INXN
1111
CALL
DELISTED
Interxion Holding N.V.
INXN
| $2.57M | 0.01% |
338
+177
| +110% | +$12.6K |
|
1112
PUT
Repligen
RGEN
$7.44B
| $2.57M | 0.01% |
299
+162
| +118% | +$11K |
|
1113
CALL
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $2.56M | 0.01% |
986
+229
| +30% | +$5.99K |
|
|
BKI
1114
PUT
DELISTED
Black Knight, Inc. Common Stock
BKI
| $2.56M | 0.01% |
425
| – | – |
|
1115
Ferrari
RACE
$63.3B
| $2.55M | 0.01% |
15,807
+10,134
| +179% | +$1.46M |
|
1116
CALL
Akamai
AKAM
$16.8B
| $2.55M | 0.01% |
318
-95
| -23% | -$7.35K |
|
1117
PUT
Bank OZK
OZK
$5.49B
| $2.55M | 0.01% |
847
-550
| -39% | -$17K |
|
1118
CALL
NCR Voyix
VYX
$1.06B
| $2.55M | 0.01% |
1,335
+769
| +136% | +$14.3K |
|
1119
CALL
Teradata
TDC
$2.68B
| $2.54M | 0.01% |
710
+239
| +51% | +$9.32K |
|
1120
CALL
Vornado Realty Trust
VNO
$7.47B
| $2.54M | 0.01% |
396
+211
| +114% | +$14.2K |
|
1121
CALL
Eversource Energy
ES
$28.2B
| $2.54M | 0.01% |
335
+323
| +2,692% | +$23.6K |
|
1122
PUT
Trimble
TRMB
$12.3B
| $2.54M | 0.01% |
562
-540
| -49% | -$22.4K |
|
|
AVYA
1123
PUT
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $2.54M | 0.01% |
2,129
+2,013
| +1,735% | +$30.8K |
|
|
MLNX
1124
CALL
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $2.53M | 0.01% |
229
-482
| -68% | -$55.5K |
|
1125
CALL
Five Below
FIVE
$11.2B
| $2.53M | 0.01% |
211
-19
| -8% | -$2.5K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.