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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
926
PUT
Madison Square Garden
MSGS
$9.52B
| $3.3M | 0.01% |
219
-211
| -49% | -$40.9K |
|
927
CALL
Lennar Class B
LEN.B
$19.2B
| $3.29M | 0.01% |
906
-334
| -27% | -$14.6K |
|
928
CALL
Cboe Global Markets
CBOE
$30B
| $3.28M | 0.01% |
368
-86
| -19% | -$9.63K |
|
929
ProShares UltraPro Short Dow 30
SDOW
$174M
| $3.28M | 0.01% |
+4,249
| New | +$3.05M |
|
930
CALL
Entegris
ENTG
$20.4B
| $3.26M | 0.01% |
729
+332
| +84% | +$17.2K |
|
931
CALL
Cameco
CCJ
$38.9B
| $3.25M | 0.01% |
4,256
+4,024
| +1,734% | +$33K |
|
932
CALL
KLA
KLAC
$281B
| $3.25M | 0.01% |
2,260
+460
| +26% | +$7.41K |
|
|
WW
933
PUT
DELISTED
WW International
WW
| $3.25M | 0.01% |
1,920
-212
| -10% | -$6.59K |
|
|
SAFM
934
CALL
DELISTED
Sanderson Farms Inc
SAFM
| $3.24M | 0.01% |
263
+231
| +722% | +$32.2K |
|
935
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$294M
| $3.24M | 0.01% |
+201,668
| New | +$4.36M |
|
936
Arista Networks
ANET
$222B
| $3.24M | 0.01% |
+255,744
| New | +$3.32M |
|
937
PUT
Moderna
MRNA
$22.6B
| $3.23M | 0.01% |
1,080
+230
| +27% | +$5.29K |
|
938
CALL
Truist Financial
TFC
$62.3B
| $3.23M | 0.01% |
1,048
-595
| -36% | -$28.1K |
|
939
Electronic Arts
EA
$52.4B
| $3.23M | 0.01% |
+32,211
| New | +$3.39M |
|
940
PUT
Equifax
EFX
$19.4B
| $3.23M | 0.01% |
270
+62
| +30% | +$9.02K |
|
941
PUT
eHealth
EHTH
$43.2M
| $3.22M | 0.01% |
229
+66
| +40% | +$7.57K |
|
|
ABB
942
PUT
DELISTED
ABB Ltd
ABB
| $3.22M | 0.01% |
1,866
+1,540
| +472% | +$33.6K |
|
943
PUT
Enterprise Products Partners
EPD
$83.9B
| $3.21M | 0.01% |
2,248
+1,581
| +237% | +$36.7K |
|
944
CALL
NetEase
NTES
$76.7B
| $3.21M | 0.01% |
500
-1,185
| -70% | -$77.9K |
|
|
ABMD
945
CALL
DELISTED
Abiomed Inc
ABMD
| $3.21M | 0.01% |
221
-422
| -66% | -$70.1K |
|
946
PUT
Sysco
SYY
$38.8B
| $3.21M | 0.01% |
703
+534
| +316% | +$36.9K |
|
947
CALL
Norwegian Cruise Line
NCLH
$8.57B
| $3.19M | 0.01% |
2,912
+2,669
| +1,098% | +$107K |
|
948
PUT
Lumen
LUMN
$6.66B
| $3.19M | 0.01% |
3,370
-51
| -1% | -$638 |
|
949
CALL
SolarEdge
SEDG
$2.73B
| $3.19M | 0.01% |
389
-336
| -46% | -$35.5K |
|
|
950
PUT
NetEase
NTES
$76.7B
| $3.18M | 0.01% |
495
-855
| -63% | -$56.2K |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.