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 | |
|---|---|---|---|---|---|---|
1001
CALL
Zoetis
ZTS
$31.6B
| $3.08M | 0.01% |
247
-177
| -42% | -$21.4K |
|
1002
CALL
MSCI
MSCI
$40B
| $3.07M | 0.01% |
141
-6
| -4% | -$1.39K |
|
1003
CALL
Amphenol
APH
$188B
| $3.07M | 0.01% |
1,272
+1,000
| +368% | +$23K |
|
1004
PUT
Hershey
HSY
$35.4B
| $3.07M | 0.01% |
198
+47
| +31% | +$7.1K |
|
1005
CALL
New York Times
NYT
$11.6B
| $3.07M | 0.01% |
1,077
+714
| +197% | +$22.5K |
|
1006
PUT
Repligen
RGEN
$7.44B
| $3.07M | 0.01% |
400
+101
| +34% | +$8.83K |
|
1007
PUT
Exelon
EXC
$48.6B
| $3.06M | 0.01% |
889
+28
| +3% | +$940 |
|
1008
PUT
CONMED
CNMD
$1.29B
| $3.06M | 0.01% |
+318
| New | +$29.9K |
|
|
PPL
1009
CALL
PPL Corp
PPL
$27.3B
| $3.06M | 0.01% |
971
-117
| -11% | -$3.54K |
|
1010
CALL
Canadian Natural Resources
CNQ
$96.9B
| $3.05M | 0.01% |
2,336
-108
| -4% | -$1.34K |
|
1011
CALL
Howmet Aerospace
HWM
$116B
| $3.04M | 0.01% |
1,523
+138
| +10% | +$2.72K |
|
1012
CALL
TripAdvisor
TRIP
$1.59B
| $3.03M | 0.01% |
784
+263
| +50% | +$11K |
|
1013
iShares MSCI United Kingdom ETF
EWU
$4.04B
| $3.03M | 0.01% |
+96,446
| New | +$3.01M |
|
1014
CALL
Pinterest
PINS
$12.4B
| $3.03M | 0.01% |
1,145
+581
| +103% | +$17.4K |
|
1015
Advance Auto Parts
AAP
$3.37B
| $3.02M | 0.01% |
18,238
+1,500
| +9% | +$225K |
|
1016
PUT
Huntington Ingalls Industries
HII
$11.3B
| $3.01M | 0.01% |
142
+75
| +112% | +$16.3K |
|
1017
PUT
TAL Education Group
TAL
$5.71B
| $3.01M | 0.01% |
878
-29
| -3% | -$1.01K |
|
1018
PUT
Danaher
DHR
$135B
| $3M | 0.01% |
235
+157
| +201% | +$19.7K |
|
1019
PUT
F5
FFIV
$22.1B
| $3M | 0.01% |
214
+185
| +638% | +$25.6K |
|
1020
PUT
NCR Voyix
VYX
$1.06B
| $3M | 0.01% |
1,552
-67
| -4% | -$1.29K |
|
1021
Analog Devices
ADI
$181B
| $3M | 0.01% |
26,847
-49,301
| -65% | -$5.58M |
|
1022
PUT
American Electric Power
AEP
$73.7B
| $3M | 0.01% |
320
+184
| +135% | +$16.7K |
|
|
ZEN
1023
PUT
DELISTED
ZENDESK INC
ZEN
| $3M | 0.01% |
411
-57
| -12% | -$4.7K |
|
1024
PUT
VanEck Durable High Dividend ETF
DURA
$38.7M
| $2.99M | 0.01% |
907
+659
| +266% | +$18.4K |
|
1025
CALL
Tencent Music
TME
$14.5B
| $2.99M | 0.01% |
2,344
+1,262
| +117% | +$17.8K |
|
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.