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 | |
|---|---|---|---|---|---|---|
|
NCI
2551
CALL
DELISTED
Navigant Consulting, Inc.
NCI
| $533K | ﹤0.01% |
191
+148
| +344% | +$3.91K |
|
2552
CALL
AES
AES
$10.6B
| $532K | ﹤0.01% |
326
+191
| +141% | +$3.08K |
|
2553
CALL
Anika Therapeutics
ANIK
$200M
| $532K | ﹤0.01% |
97
+56
| +137% | +$2.88K |
|
2554
PUT
LCI Industries
LCII
$2.54B
| $532K | ﹤0.01% |
58
+22
| +61% | +$1.96K |
|
2555
PUT
Puma Biotechnology
PBYI
$414M
| $532K | ﹤0.01% |
495
+447
| +931% | +$4.83K |
|
2556
PUT
Energizer
ENR
$1.45B
| $531K | ﹤0.01% |
122
-151
| -55% | -$6.01K |
|
2557
CALL
MPLX
MPLX
$59.5B
| $531K | ﹤0.01% |
190
-818
| -81% | -$24K |
|
2558
PUT
Neurocrine Biosciences
NBIX
$17.8B
| $531K | ﹤0.01% |
59
-57
| -49% | -$5.33K |
|
2559
CALL
Eldorado Gold
EGO
$8.4B
| $530K | ﹤0.01% |
684
+502
| +276% | +$4.08K |
|
2560
CALL
NNN REIT
NNN
$9.44B
| $530K | ﹤0.01% |
94
+77
| +453% | +$4.19K |
|
2561
CALL
Texas Capital Bancshares
TCBI
$4.32B
| $530K | ﹤0.01% |
97
+64
| +194% | +$3.65K |
|
2562
PUT
FTI Consulting
FCN
$4.88B
| $529K | ﹤0.01% |
+50
| New | +$5.1K |
|
|
TDAY
2563
CALL
USA Today Co
TDAY
$1.26B
| $529K | ﹤0.01% |
601
+596
| +11,920% | +$5.44K |
|
|
WRK
2564
DELISTED
WestRock Company
WRK
| $529K | ﹤0.01% |
+14,539
| New | +$519K |
|
|
ALDR
2565
PUT
DELISTED
Alder Biopharmaceuticals
ALDR
| $529K | ﹤0.01% |
281
+201
| +251% | +$2.3K |
|
2566
CALL
EPAM Systems
EPAM
$4.88B
| $528K | ﹤0.01% |
29
-91
| -76% | -$17.1K |
|
2567
CALL
Range Resources
RRC
$9B
| $528K | ﹤0.01% |
1,384
+1,023
| +283% | +$4.91K |
|
2568
CALL
Acco Brands
ACCO
$381M
| $527K | ﹤0.01% |
534
+27
| +5% | +$244 |
|
2569
CALL
Magna International
MGA
$17.9B
| $527K | ﹤0.01% |
99
+41
| +71% | +$2.04K |
|
|
KEM
2570
CALL
DELISTED
KEMET Corporation
KEM
| $527K | ﹤0.01% |
290
-130
| -31% | -$2.45K |
|
2571
PUT
Fox Class B
FOX
$21.6B
| $525K | ﹤0.01% |
167
-848
| -84% | -$29.3K |
|
2572
CALL
Columbia Sportswear
COLM
$3.21B
| $523K | ﹤0.01% |
54
+37
| +218% | +$3.66K |
|
2573
PUT
Wingstop
WING
$3.76B
| $523K | ﹤0.01% |
60
-105
| -64% | -$9.99K |
|
2574
CALL
Designer Brands
DBI
$292M
| $522K | ﹤0.01% |
305
+245
| +408% | +$4.16K |
|
2575
CALL
Sally Beauty Holdings
SBH
$1.44B
| $522K | ﹤0.01% |
351
+333
| +1,850% | +$4.36K |
|
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.