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 | |
|---|---|---|---|---|---|---|
401
PUT
GE Aerospace
GE
$362B
| $10.6M | 0.03% |
2,382
-76
| -3% | -$3.57K |
|
402
Fidelity National Information Services
FIS
$20.7B
| $10.6M | 0.03% |
+79,603
| New | +$10.6M |
|
403
PUT
Ferrari
RACE
$63.2B
| $10.5M | 0.03% |
684
-797
| -54% | -$127K |
|
404
PUT
Whirlpool
WHR
$2.31B
| $10.5M | 0.03% |
665
+247
| +59% | +$35.5K |
|
|
WW
405
PUT
DELISTED
WW International
WW
| $10.4M | 0.03% |
2,760
+2,002
| +264% | +$56.5K |
|
|
SPLK
406
CALL
DELISTED
Splunk Inc
SPLK
| $10.4M | 0.03% |
883
+55
| +7% | +$6.87K |
|
407
PUT
MSCI
MSCI
$40.2B
| $10.4M | 0.03% |
477
-68
| -12% | -$15.8K |
|
408
CALL
Seagate
STX
$207B
| $10.3M | 0.03% |
1,914
+652
| +52% | +$32K |
|
409
CALL
Dow Inc
DOW
$22.3B
| $10.3M | 0.03% |
2,160
+819
| +61% | +$38.3K |
|
410
CALL
Dollar General
DG
$25.4B
| $10.3M | 0.03% |
647
+250
| +63% | +$36.2K |
|
411
Northrop Grumman
NOC
$75.8B
| $10.3M | 0.03% |
27,389
+24,532
| +859% | +$8.69M |
|
412
Salesforce
CRM
$129B
| $10.2M | 0.03% |
68,744
-26,129
| -28% | -$3.97M |
|
413
PUT
HCA Healthcare
HCA
$83.5B
| $10.2M | 0.03% |
846
+75
| +10% | +$9.69K |
|
414
PUT
WisdomTree US Total Dividend Fund
DTD
$1.64B
| $10.2M | 0.03% |
5,472
-76
| -1% | -$3.71K |
|
415
CALL
Global Payments
GPN
$21.3B
| $10M | 0.03% |
629
+412
| +190% | +$67.2K |
|
416
CALL
Johnson Controls International
JCI
$87.4B
| $9.93M | 0.03% |
2,263
-1,231
| -35% | -$52.1K |
|
417
CALL
Tilray
TLRY
$493M
| $9.91M | 0.03% |
401
-120
| -23% | -$43.7K |
|
418
PayPal
PYPL
$49.4B
| $9.9M | 0.03% |
+95,624
| New | +$10.5M |
|
419
PUT
Advance Auto Parts
AAP
$3.22B
| $9.89M | 0.03% |
598
+392
| +190% | +$58.9K |
|
420
CALL
Valero Energy
VLO
$90.6B
| $9.87M | 0.03% |
1,158
-108
| -9% | -$8.73K |
|
421
PUT
SAP
SAP
$171B
| $9.85M | 0.03% |
836
+414
| +98% | +$51.3K |
|
422
PUT
Waste Management
WM
$95.3B
| $9.79M | 0.03% |
851
-125
| -13% | -$14.6K |
|
423
CALL
Crown Castle
CCI
$32.5B
| $9.73M | 0.03% |
700
+274
| +64% | +$37.9K |
|
|
JJT
424
PUT
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $9.73M | 0.03% |
4,077
-3,198
| -44% | -$140K |
|
425
PUT
eBay
EBAY
$48.5B
| $9.72M | 0.03% |
2,495
-736
| -23% | -$29.5K |
|
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.