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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
651
PUT
CoStar Group
CSGP
$11.3B
| $5.69M | 0.02% |
+960
| New | +$57.5K |
|
652
CALL
Wabtec
WAB
$50.8B
| $5.68M | 0.02% |
791
+370
| +88% | +$26.3K |
|
653
PUT
Public Storage
PSA
$60B
| $5.64M | 0.02% |
230
+176
| +326% | +$44.2K |
|
654
CALL
Whirlpool
WHR
$2.44B
| $5.64M | 0.02% |
356
-121
| -25% | -$17.4K |
|
655
PUT
Ambarella
AMBA
$2.95B
| $5.64M | 0.02% |
897
+201
| +29% | +$10.4K |
|
656
PUT
Johnson Controls International
JCI
$87.4B
| $5.63M | 0.02% |
1,282
+218
| +20% | +$9.23K |
|
657
CALL
Paychex
PAYX
$40.1B
| $5.61M | 0.02% |
678
+378
| +126% | +$31.4K |
|
658
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$249M
| $5.6M | 0.02% |
2,530
+1,381
| +120% | +$66.6K |
|
|
PPLI
659
PUT
People Inc
PPLI
$3.12B
| $5.54M | 0.02% |
1,421
-509
| -26% | -$21.7K |
|
660
CALL
Charter Communications
CHTR
$15B
| $5.52M | 0.02% |
134
-77
| -36% | -$31.1K |
|
661
CALL
GDS Holdings
GDS
$6.37B
| $5.52M | 0.02% |
1,377
+508
| +58% | +$20.5K |
|
662
CALL
Royal Gold
RGLD
$17.1B
| $5.52M | 0.02% |
448
-19
| -4% | -$2.31K |
|
663
CALL
Genuine Parts
GPC
$17B
| $5.52M | 0.02% |
554
-49
| -8% | -$4.7K |
|
|
PPLC
664
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $5.51M | 0.02% |
2,560
+306
| +14% | +$12.2K |
|
665
CALL
NetEase
NTES
$76.7B
| $5.51M | 0.02% |
1,035
+90
| +10% | +$4.58K |
|
|
PPLC
666
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $5.5M | 0.02% |
3,302
-1,118
| -25% | -$44.7K |
|
|
WRK
667
PUT
DELISTED
WestRock Company
WRK
| $5.48M | 0.02% |
1,503
+1,004
| +201% | +$35.9K |
|
|
ALXN
668
DELISTED
Alexion Pharmaceuticals
ALXN
| $5.47M | 0.02% |
55,897
+13,488
| +32% | +$1.52M |
|
669
CALL
VF Corp
VFC
$6.69B
| $5.47M | 0.02% |
638
+352
| +123% | +$30.1K |
|
670
PUT
Prologis
PLD
$138B
| $5.45M | 0.02% |
639
+119
| +23% | +$9.84K |
|
671
CALL
HEICO Corp Class A
HEI.A
$35.3B
| $5.42M | 0.02% |
434
+419
| +2,793% | +$44.4K |
|
672
CALL
Suncor Energy
SU
$77.6B
| $5.4M | 0.02% |
1,711
+163
| +11% | +$4.9K |
|
673
PUT
Truist Financial
TFC
$63B
| $5.4M | 0.02% |
1,012
-1,293
| -56% | -$64.1K |
|
|
674
CALL
Public Storage
PSA
$60B
| $5.39M | 0.02% |
220
+187
| +567% | +$47K |
|
675
CALL
XPO
XPO
$25.1B
| $5.39M | 0.02% |
2,177
+1,041
| +92% | +$24.1K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.