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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1451
CALL
Welltower
WELL
$178B
| $111K | 0.01% |
721
-2
| -0.3% | -$132 |
|
|
BLCM
1452
DELISTED
Bellicum Pharmaceuticals, Inc.
BLCM
| $111K | 0.01% |
821
-900
| -52% | -$160K |
|
|
MEMP
1453
PUT
DELISTED
Memorial Production Partners LP Common Units
MEMP
| $111K | 0.01% |
453
+425
| +1,518% | +$329 |
|
1454
PUT
Anavex Life Sciences
AVXL
$222M
| $110K | 0.01% |
508
+61
| +14% | +$217 |
|
1455
Editas Medicine
EDIT
$399M
| $110K | 0.01% |
6,786
-1,800
| -21% | -$27.3K |
|
|
FL
1456
PUT
DELISTED
Foot Locker
FL
| $110K | 0.01% |
407
+185
| +83% | +$13.2K |
|
1457
Iron Mountain
IRM
$38.2B
| $110K | 0.01% |
3,394
+3,240
| +2,104% | +$108K |
|
1458
Grand Canyon Education
LOPE
$3.71B
| $110K | 0.01% |
+1,886
| New | +$96.5K |
|
1459
Reading International Class A
RDI
$32.9M
| $110K | 0.01% |
6,668
+6,007
| +909% | +$88K |
|
|
NVRO
1460
DELISTED
NEVRO CORP.
NVRO
| $110K | 0.01% |
+1,523
| New | +$130K |
|
|
GRUB
1461
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $110K | 0.01% |
1,475
-3,462
| -70% | -$267K |
|
|
ASRT
1462
CALL
DELISTED
Assertio
ASRT
| $109K | 0.01% |
27
+20
| +286% | +$25.5K |
|
1463
BBVA Argentina
BBAR
$3.85B
| $109K | 0.01% |
6,268
+5,804
| +1,251% | +$108K |
|
1464
CALL
C.H. Robinson
CHRW
$22B
| $109K | 0.01% |
836
+510
| +156% | +$36.9K |
|
1465
CALL
Cigna
CI
$76.6B
| $109K | 0.01% |
463
+11
| +2% | +$1.44K |
|
1466
Oshkosh
OSK
$9.67B
| $109K | 0.01% |
1,691
-502
| -23% | -$31.1K |
|
1467
CALL
Synopsys
SNPS
$71.5B
| $109K | 0.01% |
509
+380
| +295% | +$22.6K |
|
1468
PUT
Verizon
VZ
$194B
| $109K | 0.01% |
1,959
+1,026
| +110% | +$51.3K |
|
1469
WIX.com
WIX
$2.15B
| $109K | 0.01% |
2,447
-1,448
| -37% | -$65.3K |
|
|
VMW
1470
CALL
DELISTED
VMware, Inc
VMW
| $109K | 0.01% |
644
-1,678
| -72% | -$130K |
|
1471
American Financial Group
AFG
$11.9B
| $108K | 0.01% |
+1,233
| New | +$98.9K |
|
1472
SiriusXM
SIRI
$10B
| $108K | 0.01% |
2,441
+2,240
| +1,114% | +$97.5K |
|
1473
CALL
Westlake Corp
WLK
$9.46B
| $108K | 0.01% |
234
+63
| +37% | +$3.44K |
|
|
PTLA
1474
PUT
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $108K | 0.01% |
845
+539
| +176% | +$10.5K |
|
|
CBI
1475
CALL
DELISTED
Chicago Bridge & Iron Nv
CBI
| $108K | 0.01% |
826
+250
| +43% | +$7.82K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.