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 | |
|---|---|---|---|---|---|---|
|
LKFT
726
PUT
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.83B
| $4.58M | 0.01% |
355
+227
| +177% | +$26.9K |
|
727
PUT
National Healthcare
NHC
$3.53B
| $4.58M | 0.01% |
564
+154
| +38% | +$11.9K |
|
728
PUT
MGM Resorts International
MGM
$11.7B
| $4.56M | 0.01% |
1,597
+182
| +13% | +$4.86K |
|
729
CALL
HP
HPQ
$23.7B
| $4.56M | 0.01% |
2,194
-102
| -4% | -$2.02K |
|
730
Shopify
SHOP
$148B
| $4.56M | 0.01% |
151,940
+124,660
| +457% | +$3.25M |
|
|
UN
731
CALL
DELISTED
Unilever NV New York Registry Shares
UN
| $4.55M | 0.01% |
750
+21
| +3% | +$1.26K |
|
|
PPLI
732
CALL
People Inc
PPLI
$3.12B
| $4.55M | 0.01% |
1,169
+509
| +77% | +$20.3K |
|
733
CALL
DaVita
DVA
$15.2B
| $4.54M | 0.01% |
808
+26
| +3% | +$1.35K |
|
734
CALL
State Street
STT
$50.8B
| $4.54M | 0.01% |
810
+606
| +297% | +$37.7K |
|
735
CALL
Teva Pharmaceuticals
TEVA
$36B
| $4.53M | 0.01% |
4,910
+2,640
| +116% | +$31.8K |
|
736
PUT
General Dynamics
GD
$104B
| $4.53M | 0.01% |
249
-112
| -31% | -$19.3K |
|
737
PUT
uniQure
QURE
$2.64B
| $4.52M | 0.01% |
579
+555
| +2,313% | +$35.4K |
|
738
CALL
Stryker
SYK
$126B
| $4.52M | 0.01% |
220
-29
| -12% | -$5.54K |
|
739
CALL
Nucor
NUE
$56.4B
| $4.52M | 0.01% |
820
-264
| -24% | -$14.5K |
|
740
PUT
Lear
LEA
$7.21B
| $4.48M | 0.01% |
322
+18
| +6% | +$2.52K |
|
|
DOCU
741
CALL
DocuSign
DOCU
$9.58B
| $4.46M | 0.01% |
897
+132
| +17% | +$7.05K |
|
742
CALL
Quest Diagnostics
DGX
$25.5B
| $4.43M | 0.01% |
435
+342
| +368% | +$32.9K |
|
743
PUT
Freeport-McMoran
FCX
$89.6B
| $4.42M | 0.01% |
3,808
+730
| +24% | +$8.5K |
|
|
BKI
744
CALL
DELISTED
Black Knight, Inc. Common Stock
BKI
| $4.42M | 0.01% |
734
+2
| +0.3% | +$114 |
|
745
PUT
VeriSign
VRSN
$25.3B
| $4.41M | 0.01% |
211
-28
| -12% | -$5.5K |
|
|
MDR
746
CALL
DELISTED
McDermott International
MDR
| $4.4M | 0.01% |
4,557
+1,591
| +54% | +$12.7K |
|
747
PUT
Johnson Controls International
JCI
$87.1B
| $4.39M | 0.01% |
1,064
+551
| +107% | +$21.2K |
|
748
CALL
Enterprise Products Partners
EPD
$84B
| $4.39M | 0.01% |
1,522
-35
| -2% | -$1.01K |
|
749
Palo Alto Networks
PANW
$264B
| $4.38M | 0.01% |
+129,150
| New | +$4.83M |
|
|
CY
750
CALL
DELISTED
Cypress Semiconductor
CY
| $4.38M | 0.01% |
1,971
+1,265
| +179% | +$22.9K |
|
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.