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 | |
|---|---|---|---|---|---|---|
826
PUT
Tractor Supply
TSCO
$16.3B
| $3.9M | 0.01% |
1,790
+1,035
| +137% | +$21.4K |
|
827
CALL
Ferrari
RACE
$63.3B
| $3.89M | 0.01% |
241
-464
| -66% | -$66.8K |
|
828
PUT
ProShares UltraShort Health Care
RXD
$3.25M
| $3.87M | 0.01% |
347
-228
| -40% | -$21K |
|
|
INFO
829
PUT
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $3.87M | 0.01% |
608
+605
| +20,167% | +$34.7K |
|
830
CALL
J.M. Smucker
SJM
$12.6B
| $3.87M | 0.01% |
336
-156
| -32% | -$19K |
|
|
MMP
831
CALL
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $3.86M | 0.01% |
603
-210
| -26% | -$13K |
|
|
MDCO
832
CALL
DELISTED
Medicines Co
MDCO
| $3.86M | 0.01% |
1,058
+164
| +18% | +$5.35K |
|
833
PUT
ING
ING
$93.8B
| $3.86M | 0.01% |
3,333
-235
| -7% | -$2.8K |
|
834
CALL
Franco-Nevada
FNV
$41.4B
| $3.85M | 0.01% |
454
+404
| +808% | +$30.5K |
|
|
FL
835
PUT
DELISTED
Foot Locker
FL
| $3.85M | 0.01% |
919
-42
| -4% | -$2.18K |
|
836
CALL
Repligen
RGEN
$7.44B
| $3.85M | 0.01% |
448
+209
| +87% | +$14.2K |
|
837
CALL
Innoviva
INVA
$1.58B
| $3.85M | 0.01% |
2,643
+2,631
| +21,925% | +$37.3K |
|
|
STMP
838
PUT
DELISTED
Stamps.com, Inc.
STMP
| $3.85M | 0.01% |
850
-410
| -33% | -$23.5K |
|
|
AVLR
839
CALL
DELISTED
Avalara, Inc.
AVLR
| $3.84M | 0.01% |
532
+60
| +13% | +$3.87K |
|
|
ONCE
840
CALL
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $3.84M | 0.01% |
375
+46
| +14% | +$4.96K |
|
841
CALL
PagSeguro Digital
PAGS
$2.57B
| $3.84M | 0.01% |
985
+274
| +39% | +$8.48K |
|
842
CALL
AstraZeneca
AZN
$263B
| $3.83M | 0.01% |
464
+207
| +81% | +$16.2K |
|
843
Boeing
BA
$165B
| $3.83M | 0.01% |
+10,515
| New | +$3.83M |
|
844
PUT
Equifax
EFX
$20.3B
| $3.83M | 0.01% |
283
-21
| -7% | -$2.63K |
|
|
AMED
845
PUT
DELISTED
Amedisys
AMED
| $3.81M | 0.01% |
314
-30
| -9% | -$3.56K |
|
846
CALL
Wolfspeed
WOLF
$1.2B
| $3.81M | 0.01% |
678
+318
| +88% | +$19.4K |
|
|
FLIR
847
CALL
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
| $3.81M | 0.01% |
704
-117
| -14% | -$5.93K |
|
848
PUT
Acadia Pharmaceuticals
ACAD
$4.25B
| $3.8M | 0.01% |
1,423
+408
| +40% | +$10.4K |
|
849
PUT
NRG Energy
NRG
$29.8B
| $3.8M | 0.01% |
1,083
-84
| -7% | -$3.17K |
|
850
PUT
Cardinal Health
CAH
$53.4B
| $3.8M | 0.01% |
807
-306
| -27% | -$14.1K |
|
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.