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 | |
|---|---|---|---|---|---|---|
526
CALL
Boston Beer
SAM
$1.82B
| $7.39M | 0.02% |
203
+124
| +157% | +$48.7K |
|
527
JD.com
JD
$40.6B
| $7.38M | 0.02% |
+261,772
| New | +$7.91M |
|
528
CALL
BHP
BHP
$212B
| $7.35M | 0.02% |
1,669
+393
| +31% | +$18.4K |
|
529
PUT
Vulcan Materials
VMC
$35.7B
| $7.35M | 0.02% |
486
+5
| +1% | +$706 |
|
|
CGC
530
PUT
Canopy Growth
CGC
$382M
| $7.33M | 0.02% |
320
-149
| -32% | -$45.6K |
|
|
GRUB
531
PUT
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $7.32M | 0.02% |
652
+401
| +160% | +$53.3K |
|
532
Amgen
AMGN
$201B
| $7.3M | 0.02% |
37,738
+15,455
| +69% | +$2.97M |
|
|
AVLR
533
CALL
DELISTED
Avalara, Inc.
AVLR
| $7.3M | 0.02% |
1,085
+553
| +104% | +$44.7K |
|
534
PUT
Cheniere Energy
LNG
$57B
| $7.3M | 0.02% |
1,157
-342
| -23% | -$21.9K |
|
535
PUT
Zimmer Biomet
ZBH
$17.3B
| $7.29M | 0.02% |
547
+399
| +270% | +$51.5K |
|
|
HES
536
CALL
DELISTED
Hess
HES
| $7.27M | 0.02% |
1,202
-224
| -16% | -$14K |
|
537
PUT
Lyft
LYFT
$5.32B
| $7.25M | 0.02% |
1,776
+471
| +36% | +$25.7K |
|
538
CALL
Eaton
ETN
$161B
| $7.24M | 0.02% |
871
-699
| -45% | -$56.6K |
|
|
KFYP
539
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $7.23M | 0.02% |
1,750
+414
| +31% | +$11.2K |
|
|
LHCG
540
PUT
DELISTED
LHC Group LLC
LHCG
| $7.22M | 0.02% |
636
+291
| +84% | +$35.1K |
|
541
PUT
MGM Resorts International
MGM
$11.5B
| $7.21M | 0.02% |
2,603
+1,006
| +63% | +$28.9K |
|
542
CALL
Verisk Analytics
VRSK
$25.3B
| $7.2M | 0.02% |
455
+446
| +4,956% | +$69.2K |
|
543
PUT
TSMC
TSM
$2.16T
| $7.18M | 0.02% |
1,546
+483
| +45% | +$20.6K |
|
544
CALL
D.R. Horton
DHI
$39.9B
| $7.17M | 0.02% |
1,360
-713
| -34% | -$34K |
|
545
PUT
General Dynamics
GD
$103B
| $7.16M | 0.02% |
392
+143
| +57% | +$26.6K |
|
546
PUT
Motorola Solutions
MSI
$67.6B
| $7.16M | 0.02% |
420
+260
| +163% | +$44.6K |
|
547
Wynn Resorts
WYNN
$10B
| $7.15M | 0.02% |
65,747
+53,100
| +420% | +$6.32M |
|
548
CALL
Capital One
COF
$123B
| $7M | 0.02% |
770
-446
| -37% | -$40.1K |
|
549
CALL
KLA
KLAC
$286B
| $7M | 0.02% |
4,390
+740
| +20% | +$10.3K |
|
|
WWE
550
CALL
DELISTED
World Wrestling Entertainment
WWE
| $6.99M | 0.02% |
983
+311
| +46% | +$22.3K |
|
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.