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 | |
|---|---|---|---|---|---|---|
451
RTX Corp
RTX
$282B
| $9M | 0.03% |
104,747
-32,002
| -23% | -$2.66M |
|
452
PUT
LyondellBasell Industries
LYB
$19.9B
| $8.96M | 0.03% |
1,002
-100
| -9% | -$8.15K |
|
453
CALL
Wayfair
W
$10.9B
| $8.96M | 0.03% |
799
+287
| +56% | +$36.7K |
|
454
CALL
Kimberly-Clark
KMB
$35.6B
| $8.95M | 0.03% |
630
+98
| +18% | +$13.5K |
|
455
CALL
CSX Corp
CSX
$98.1B
| $8.94M | 0.03% |
3,870
-522
| -12% | -$12.2K |
|
456
CALL
Cracker Barrel
CBRL
$1.16B
| $8.93M | 0.03% |
549
-57
| -9% | -$9.6K |
|
|
XYZ
457
Block Inc
XYZ
$45.5B
| $8.91M | 0.03% |
143,833
+49,881
| +53% | +$3.39M |
|
458
PUT
Zoetis
ZTS
$31.3B
| $8.88M | 0.03% |
713
+37
| +5% | +$4.47K |
|
459
PUT
Simon Property Group
SPG
$73B
| $8.87M | 0.03% |
570
-328
| -37% | -$51K |
|
460
PUT
Okta
OKTA
$23.7B
| $8.87M | 0.03% |
901
-22
| -2% | -$2.75K |
|
|
AMRN
461
CALL
Amarin Corp
AMRN
$285M
| $8.82M | 0.03% |
291
+98
| +51% | +$34.2K |
|
462
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$707M
| $8.81M | 0.03% |
2,333
+694
| +42% | +$23.1K |
|
|
VMW
463
CALL
DELISTED
VMware, Inc
VMW
| $8.79M | 0.03% |
586
+85
| +17% | +$13.4K |
|
464
CALL
Edwards Lifesciences
EW
$48.3B
| $8.73M | 0.02% |
1,191
+609
| +105% | +$42.8K |
|
465
CALL
Match Group
MTCH
$8.72B
| $8.73M | 0.02% |
1,222
+360
| +42% | +$28.1K |
|
466
PUT
Verisk Analytics
VRSK
$25.3B
| $8.67M | 0.02% |
548
+463
| +545% | +$71.8K |
|
467
PUT
Chubb
CB
$137B
| $8.65M | 0.02% |
536
+490
| +1,065% | +$75.8K |
|
468
PUT
Best Buy
BBY
$17.8B
| $8.65M | 0.02% |
1,254
+398
| +46% | +$27.8K |
|
469
CALL
Cognizant
CTSH
$20.3B
| $8.63M | 0.02% |
1,433
+178
| +14% | +$11.3K |
|
470
PUT
American Airlines Group
AAL
$8.96B
| $8.6M | 0.02% |
3,189
-616
| -16% | -$18K |
|
|
471
PUT
Edwards Lifesciences
EW
$48.3B
| $8.6M | 0.02% |
1,173
+966
| +467% | +$67.9K |
|
472
PUT
Linde
LIN
$234B
| $8.54M | 0.02% |
441
+237
| +116% | +$45.9K |
|
473
PUT
Agnico Eagle Mines
AEM
$72.3B
| $8.53M | 0.02% |
1,592
+1,184
| +290% | +$67.1K |
|
|
CERN
474
PUT
DELISTED
Cerner Corp
CERN
| $8.53M | 0.02% |
1,252
+823
| +192% | +$58.3K |
|
475
PUT
Sea Limited
SE
$60.9B
| $8.52M | 0.02% |
2,752
-488
| -15% | -$16.4K |
|
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.