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 | |
|---|---|---|---|---|---|---|
476
PUT
Sherwin-Williams
SHW
$76.6B
| $8.47M | 0.02% |
462
+180
| +64% | +$30.6K |
|
477
PUT
Check Point Software Technologies
CHKP
$12.9B
| $8.42M | 0.02% |
769
+259
| +51% | +$28.9K |
|
478
PUT
MarketAxess Holdings
MKTX
$4.06B
| $8.38M | 0.02% |
256
-95
| -27% | -$34K |
|
479
CALL
Novartis
NVS
$297B
| $8.38M | 0.02% |
1,222
+257
| +27% | +$23.1K |
|
480
PUT
Ecolab
ECL
$74.1B
| $8.36M | 0.02% |
422
+167
| +65% | +$33.5K |
|
481
CALL
RH
RH
$3.14B
| $8.3M | 0.02% |
486
+57
| +13% | +$8.12K |
|
482
CALL
Oneok
OKE
$58.7B
| $8.28M | 0.02% |
1,123
+259
| +30% | +$18.3K |
|
|
ETFC
483
PUT
DELISTED
E*Trade Financial Corporation
ETFC
| $8.21M | 0.02% |
1,879
-156
| -8% | -$6.91K |
|
|
PARA
484
CALL
DELISTED
Paramount Global Class B
PARA
| $8.17M | 0.02% |
2,024
+639
| +46% | +$29.9K |
|
485
CALL
S&P Global
SPGI
$124B
| $8.16M | 0.02% |
333
-13
| -4% | -$3.25K |
|
486
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
$21.3B
| $8.13M | 0.02% |
134,694
+109,276
| +430% | +$6.59M |
|
487
PUT
Post Holdings
POST
$4.09B
| $8.09M | 0.02% |
1,167
+305
| +35% | +$20.8K |
|
|
CGC
488
CALL
Canopy Growth
CGC
$382M
| $8.09M | 0.02% |
353
+60
| +20% | +$18.3K |
|
489
PUT
Kimberly-Clark
KMB
$35.6B
| $8.07M | 0.02% |
568
+274
| +93% | +$37.7K |
|
|
PXD
490
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $8.06M | 0.02% |
641
+81
| +14% | +$10.7K |
|
491
PUT
Norfolk Southern
NSC
$78.3B
| $8.05M | 0.02% |
448
-250
| -36% | -$46K |
|
492
CALL
Morgan Stanley
MS
$338B
| $7.99M | 0.02% |
1,872
-1,912
| -51% | -$81.7K |
|
493
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $7.98M | 0.02% |
6,088
+648
| +12% | +$10.3K |
|
494
CALL
Lyft
LYFT
$5.32B
| $7.96M | 0.02% |
1,948
+650
| +50% | +$35.5K |
|
|
495
PUT
Novartis
NVS
$297B
| $7.96M | 0.02% |
1,059
-56
| -5% | -$5.03K |
|
496
CALL
SLB Ltd
SLB
$70.6B
| $7.92M | 0.02% |
2,318
-334
| -13% | -$12.2K |
|
497
PUT
Dell
DELL
$284B
| $7.82M | 0.02% |
2,975
+1,716
| +136% | +$45.5K |
|
498
PUT
Veeva Systems
VEEV
$29.2B
| $7.79M | 0.02% |
510
-328
| -39% | -$52.6K |
|
499
PUT
Take-Two Interactive
TTWO
$42.7B
| $7.77M | 0.02% |
620
-629
| -50% | -$78.5K |
|
500
CALL
Synopsys
SNPS
$71.5B
| $7.75M | 0.02% |
565
+204
| +57% | +$27.6K |
|
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.