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 | |
|---|---|---|---|---|---|---|
576
CALL
United States Oil Fund
USO
$2.5B
| $6.56M | 0.02% |
723
+243
| +51% | +$22.8K |
|
|
GRUB
577
CALL
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $6.56M | 0.02% |
584
+217
| +59% | +$28.8K |
|
578
CALL
Boston Scientific
BSX
$64.8B
| $6.55M | 0.02% |
1,611
-1,412
| -47% | -$59.8K |
|
|
PXD
579
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $6.55M | 0.02% |
521
-189
| -27% | -$25K |
|
580
PUT
Intuit
INTU
$77B
| $6.54M | 0.02% |
246
-379
| -61% | -$104K |
|
581
CALL
Hilton Worldwide
HLT
$72.9B
| $6.5M | 0.02% |
698
+360
| +107% | +$34.2K |
|
582
PUT
Capri Holdings
CPRI
$1.78B
| $6.48M | 0.02% |
1,954
+744
| +61% | +$23.8K |
|
583
CALL
Truist Financial
TFC
$62.5B
| $6.48M | 0.02% |
1,214
+143
| +13% | +$7.09K |
|
584
PUT
OSI Systems
OSIS
$3.53B
| $6.47M | 0.02% |
637
+75
| +13% | +$8.1K |
|
585
CALL
Southern Company
SO
$109B
| $6.45M | 0.02% |
1,045
+369
| +55% | +$21.4K |
|
586
CALL
Equifax
EFX
$19.6B
| $6.44M | 0.02% |
458
+230
| +101% | +$32.4K |
|
587
PUT
Crown Castle
CCI
$32.6B
| $6.42M | 0.02% |
462
-530
| -53% | -$73.3K |
|
588
Pfizer
PFE
$143B
| $6.42M | 0.02% |
188,364
-734
| -0.4% | -$26.7K |
|
|
JWN
589
PUT
DELISTED
Nordstrom
JWN
| $6.39M | 0.02% |
1,898
+346
| +22% | +$10.6K |
|
590
PUT
Williams Companies
WMB
$92B
| $6.38M | 0.02% |
2,650
+424
| +19% | +$10.7K |
|
591
CALL
CarMax
KMX
$8.29B
| $6.36M | 0.02% |
723
-56
| -7% | -$4.81K |
|
592
CALL
Royal Caribbean
RCL
$76B
| $6.35M | 0.02% |
586
+439
| +299% | +$48.3K |
|
593
CALL
Diageo
DEO
$45.7B
| $6.33M | 0.02% |
387
+98
| +34% | +$16.4K |
|
594
PUT
Trip.com Group
TCOM
$27.1B
| $6.32M | 0.02% |
2,159
+1,484
| +220% | +$52.2K |
|
595
PUT
T-Mobile US
TMUS
$183B
| $6.31M | 0.02% |
801
-957
| -54% | -$75K |
|
596
CALL
Fidelity National Information Services
FIS
$20.7B
| $6.3M | 0.02% |
475
-291
| -38% | -$38.6K |
|
597
CALL
Colgate-Palmolive
CL
$72.1B
| $6.3M | 0.02% |
857
-960
| -53% | -$69.6K |
|
598
PUT
Zebra Technologies
ZBRA
$12.2B
| $6.27M | 0.02% |
304
+226
| +290% | +$45.7K |
|
599
CALL
Axalta
AXTA
$6.78B
| $6.24M | 0.02% |
2,071
+199
| +11% | +$5.87K |
|
600
CALL
Kraft Heinz
KHC
$30.1B
| $6.24M | 0.02% |
2,232
-3,361
| -60% | -$96.7K |
|
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.