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 | |
|---|---|---|---|---|---|---|
|
KFYP
601
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $5.87M | 0.02% |
1,336
+145
| +12% | +$4.02K |
|
602
PUT
Post Holdings
POST
$4.09B
| $5.86M | 0.02% |
862
+404
| +88% | +$28.4K |
|
603
PUT
iShares Convertible Bond ETF
ICVT
$7.37B
| $5.85M | 0.02% |
1,685
-762
| -31% | -$44.6K |
|
604
CALL
Tyson Foods
TSN
$20B
| $5.84M | 0.02% |
723
+245
| +51% | +$18.9K |
|
|
CRON
605
CALL
Cronos Group
CRON
$1.02B
| $5.83M | 0.02% |
3,647
-1,008
| -22% | -$16.3K |
|
606
Baidu
BIDU
$36.5B
| $5.82M | 0.02% |
49,590
-57,084
| -54% | -$8.13M |
|
|
EXAS
607
CALL
DELISTED
Exact Sciences
EXAS
| $5.82M | 0.02% |
493
+69
| +16% | +$6.95K |
|
608
PUT
Galicia Financial Group
GGAL
$8.06B
| $5.82M | 0.02% |
1,639
+1,239
| +310% | +$33.2K |
|
609
CALL
VeriSign
VRSN
$23.8B
| $5.81M | 0.02% |
278
+273
| +5,460% | +$53.6K |
|
|
KFYP
610
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $5.8M | 0.02% |
1,326
+1,016
| +328% | +$28.2K |
|
611
CALL
Rockwell Automation
ROK
$51.3B
| $5.8M | 0.02% |
354
+243
| +219% | +$41.1K |
|
612
CALL
Match Group
MTCH
$8.72B
| $5.8M | 0.02% |
862
+628
| +268% | +$41.1K |
|
613
Dominion Energy
D
$62.8B
| $5.79M | 0.02% |
+74,882
| New | +$5.71M |
|
614
CALL
Agnico Eagle Mines
AEM
$72.3B
| $5.78M | 0.02% |
1,128
-371
| -25% | -$16.2K |
|
615
PUT
SAP
SAP
$171B
| $5.77M | 0.02% |
422
-198
| -32% | -$24.6K |
|
616
CALL
Novartis
NVS
$297B
| $5.76M | 0.02% |
965
+385
| +66% | +$32.6K |
|
617
CALL
Zillow
Z
$6.77B
| $5.75M | 0.02% |
1,241
+497
| +67% | +$19.8K |
|
|
GRUB
618
CALL
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $5.72M | 0.02% |
367
+16
| +5% | +$2.18K |
|
|
B
619
PUT
Barrick Mining
B
$62.3B
| $5.7M | 0.02% |
3,615
+1,452
| +67% | +$19.3K |
|
620
CALL
Stanley Black & Decker
SWK
$13.6B
| $5.61M | 0.02% |
388
-307
| -44% | -$43.3K |
|
621
CALL
Allstate
ALL
$65.5B
| $5.6M | 0.02% |
551
+93
| +20% | +$9.09K |
|
622
CALL
Ciena
CIEN
$57.7B
| $5.59M | 0.02% |
1,360
+28
| +2% | +$1.08K |
|
623
CALL
Vanguard FTSE Europe ETF
VGK
$29.8B
| $5.59M | 0.02% |
1,290
+865
| +204% | +$47.1K |
|
624
PUT
Deckers Outdoor
DECK
$13.4B
| $5.58M | 0.02% |
1,902
+1,248
| +191% | +$32.4K |
|
625
PUT
XPO
XPO
$25.1B
| $5.58M | 0.02% |
2,790
-781
| -22% | -$15.9K |
|
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.