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 | |
|---|---|---|---|---|---|---|
|
LSI
551
PUT
DELISTED
Life Storage, Inc.
LSI
| $6.99M | 0.02% |
995
-403
| -29% | -$27.4K |
|
552
CALL
Tyson Foods
TSN
$20B
| $6.98M | 0.02% |
810
+87
| +12% | +$7.4K |
|
553
CALL
Papa John's
PZZA
$999M
| $6.94M | 0.02% |
1,325
+994
| +300% | +$46.8K |
|
554
CALL
Franco-Nevada
FNV
$41.3B
| $6.92M | 0.02% |
759
+305
| +67% | +$28K |
|
555
PUT
Mettler-Toledo International
MTD
$26.9B
| $6.9M | 0.02% |
98
+74
| +308% | +$54.3K |
|
556
PUT
PVH
PVH
$3.59B
| $6.89M | 0.02% |
781
+582
| +292% | +$48.6K |
|
|
ANSS
557
PUT
DELISTED
Ansys
ANSS
| $6.88M | 0.02% |
311
+250
| +410% | +$52.7K |
|
558
PUT
Old Dominion Freight Line
ODFL
$48B
| $6.88M | 0.02% |
1,215
+915
| +305% | +$49.6K |
|
559
Amazon
AMZN
$2.51T
| $6.88M | 0.02% |
+79,220
| New | +$7.35M |
|
560
CALL
PG&E
PCG
$47B
| $6.85M | 0.02% |
6,854
+2,264
| +49% | +$34.2K |
|
561
CALL
Danaher
DHR
$135B
| $6.77M | 0.02% |
529
-378
| -42% | -$47.3K |
|
|
AMRN
562
PUT
Amarin Corp
AMRN
$285M
| $6.76M | 0.02% |
223
+91
| +69% | +$31.8K |
|
563
Morgan Stanley
MS
$338B
| $6.76M | 0.02% |
158,418
+103,389
| +188% | +$4.42M |
|
564
ProShares Short VIX Short-Term Futures ETF
SVXY
$218M
| $6.75M | 0.02% |
252,744
+213,278
| +540% | +$5.73M |
|
|
565
State Street Industrial Select Sector SPDR ETF
XLI
$33.7B
| $6.74M | 0.02% |
86,822
-225,904
| -72% | -$17.3M |
|
566
CALL
Carvana
CVNA
$43.1B
| $6.74M | 0.02% |
5,105
+835
| +20% | +$12K |
|
567
PUT
Penumbra
PEN
$12.5B
| $6.74M | 0.02% |
501
+500
| +50,000% | +$77.3K |
|
568
CALL
Zscaler
ZS
$22.6B
| $6.7M | 0.02% |
1,418
+1,031
| +266% | +$74.3K |
|
569
PUT
Cencora
COR
$59.4B
| $6.69M | 0.02% |
813
+304
| +60% | +$26.1K |
|
|
BLUE
570
CALL
DELISTED
bluebird bio
BLUE
| $6.66M | 0.02% |
56
+25
| +81% | +$38.2K |
|
571
PUT
iShares Silver Trust
SLV
$27.8B
| $6.63M | 0.02% |
4,164
+1,642
| +65% | +$26.1K |
|
572
PUT
SolarEdge
SEDG
$2.75B
| $6.61M | 0.02% |
790
+395
| +100% | +$29.4K |
|
|
CBM
573
CALL
DELISTED
Cambrex Corporation
CBM
| $6.61M | 0.02% |
1,111
+944
| +565% | +$50.5K |
|
574
CALL
Weibo
WB
$1.92B
| $6.6M | 0.02% |
1,475
+408
| +38% | +$17.3K |
|
575
PUT
MetLife
MET
$59.5B
| $6.56M | 0.02% |
1,392
-633
| -31% | -$30.2K |
|
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.