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 | |
|---|---|---|---|---|---|---|
1451
CALL
Freeport-McMoran
FCX
$90B
| $1.73M | ﹤0.01% |
1,806
-815
| -31% | -$8.37K |
|
1452
CALL
Hormel Foods
HRL
$13.9B
| $1.73M | ﹤0.01% |
395
+185
| +88% | +$7.76K |
|
|
NVRO
1453
PUT
DELISTED
NEVRO CORP.
NVRO
| $1.73M | ﹤0.01% |
201
+53
| +36% | +$4.01K |
|
|
LKFT
1454
CALL
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.82B
| $1.73M | ﹤0.01% |
113
+69
| +157% | +$11.3K |
|
1455
CALL
Molson Coors Class B
TAP
$7.68B
| $1.73M | ﹤0.01% |
300
-160
| -35% | -$8.68K |
|
1456
CALL
Boot Barn
BOOT
$4.55B
| $1.72M | ﹤0.01% |
493
+331
| +204% | +$11K |
|
1457
CALL
Vornado Realty Trust
VNO
$7.47B
| $1.72M | ﹤0.01% |
270
-126
| -32% | -$7.92K |
|
|
ECOL
1458
CALL
DELISTED
US Ecology, Inc.
ECOL
| $1.72M | ﹤0.01% |
269
+212
| +372% | +$13.1K |
|
1459
CALL
Enbridge
ENB
$124B
| $1.72M | ﹤0.01% |
490
-15
| -3% | -$519 |
|
|
SGEN
1460
PUT
DELISTED
Seagen Inc. Common Stock
SGEN
| $1.72M | ﹤0.01% |
201
+136
| +209% | +$9.97K |
|
|
SNV
1461
PUT
DELISTED
Synovus
SNV
| $1.71M | ﹤0.01% |
479
-342
| -42% | -$12.3K |
|
1462
PUT
Ashland
ASH
$3.04B
| $1.71M | ﹤0.01% |
222
-48
| -18% | -$3.65K |
|
1463
Cencora
COR
$60.3B
| $1.71M | ﹤0.01% |
20,780
-768
| -4% | -$66K |
|
1464
CALL
Medifast
MED
$108M
| $1.71M | ﹤0.01% |
165
+75
| +83% | +$8.06K |
|
1465
CALL
Aramark
ARMK
$15B
| $1.71M | ﹤0.01% |
543
+109
| +25% | +$3.06K |
|
1466
CALL
Dillards
DDS
$8.87B
| $1.71M | ﹤0.01% |
258
+105
| +69% | +$6.71K |
|
1467
Gen Digital
GEN
$15.6B
| $1.71M | ﹤0.01% |
72,193
+43,713
| +153% | +$1.02M |
|
1468
CALL
Barclays
BCS
$94.1B
| $1.7M | ﹤0.01% |
2,319
+1,093
| +89% | +$7.9K |
|
|
ZGNX
1469
DELISTED
Zogenix, Inc.
ZGNX
| $1.7M | ﹤0.01% |
+42,457
| New | +$1.96M |
|
1470
CALL
Evergy
EVRG
$20.1B
| $1.7M | ﹤0.01% |
255
+247
| +3,088% | +$15.6K |
|
|
MMP
1471
CALL
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $1.69M | ﹤0.01% |
255
-348
| -58% | -$22.9K |
|
1472
CALL
Chewy
CHWY
$8.54B
| $1.69M | ﹤0.01% |
687
+490
| +249% | +$15.4K |
|
1473
CALL
State Street
STT
$50.9B
| $1.69M | ﹤0.01% |
285
-525
| -65% | -$29.1K |
|
1474
WisdomTree Japan Hedged Equity Fund
DXJ
$7.23B
| $1.68M | ﹤0.01% |
33,357
+12,966
| +64% | +$627K |
|
1475
CALL
KeyCorp
KEY
$24.3B
| $1.68M | ﹤0.01% |
943
+551
| +141% | +$9.53K |
|
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.